U.S. Pat. No. 7,682,237

DESCRIPTION OF THE PREFERRED EMBODIMENTS

In what follows, an embodiment of the present invention will be explained in conjunction with the accompanying drawings. Meanwhile, like references indicate the same or functionally similar elements throughout the respective drawings, and therefore redundant explanation is not repeated.

FIG. 1is a view showing the overall configuration of a stick drum game system as the music game system in accordance with the embodiment of the present invention. As shown inFIG. 1, this music game system comprises a music game console1, a pair of sticks96and a television monitor90.

The music game console1includes a housing which is formed by housing member3and5. Then, a strike surface9is exposed from an opening of the housing member5. In addition, the housing member5is provided with a power switch11. Furthermore, the housing member3is provided with a stand7. With this stand7, the strike surface9is to incline at a predetermined angle from the horizontal surface. Incidentally, the stand7can be detached such that the strike surface9levels out. The player can enjoy a game by striking the strike surface9with the sticks96. The strike surface9is provided with a left batter surface2and a right batter surface4.

Optionally, a memory cartridge95containing a ROM (read only memory) can be inserted into the music game console1. Accordingly, the game can be enjoyed together with a variety of music by changing the memory cartridge95.

The music game console1and the television monitor90are connected to each other by an AV cable93. Furthermore, a DC power voltage is supplied to the music game console1through an AC adapter94. Alternatively, a battery cell (not shown in the figure) can be used to supply the DC power voltage in place of the AC adaptor94. The television monitor90is provided with a screen91at the front side.

FIG. 2is a plan view of the music game console1ofFIG. 1.FIG. 3is a side view showing the music game console1ofFIG. 1. As shown inFIG. 3, the strike surface9inclines with the stand7at a predetermined angle from the horizontal surface.

FIG. 4is an exploded assembly diagram showing the music game console1ofFIG. 1.FIG. 5is a cross sectional view along I-I line ofFIG. 2. As shown inFIG. 4andFIG. 5, the music game console1is constructed as follows. In this example, the illustration of the stand7is omitted.

In the bottom surface inside the housing member3, there are disposed a battery box33and a substrate31. A high speed processor to be described below, a ROM and other necessary components are mounted on this substrate31together with necessary circuitry, while a connector29is electrically connected thereto for the memory cartridge95to be inserted.

While a transmission plate13ais provided just below the right batter surface4, a piezoelectric elements17ais fixed to the lower surface of the vibration transmission plate13aby a fixing plate23aand screws37. In this case, the piezoelectric element17ais disposed between two buffer members15aand19awhich serve to prevent the vibration of the vibration transmission plate13afrom being transmitted directly to the piezoelectric element17a. Similarly, while a vibration transmission plate13bis provided just below the left batter surface2, a piezoelectric element17bis fixed to the lower surface of the vibration transmission plate13bin a symmetrical fashion.

The vibration transmission plate13awith the piezoelectric element17afixed thereto is supported by a support plate25through four cylindrical resilient members21a. In this case, the vibration transmission plate13ais provided at its lower surface with four guides130a(only two are as illustrated in the figure) which are inserted into through four holes27a(only two are as illustrated in the figure) opened in the support plate25with the intervening resilient member21a. Then, the diameter of the through holes27ais determined in order that the guides130ado not come in contact with the inner surfaces of the through hole27a. On the other hand, the vibration transmission plate13aand the vibration transmission plate13bare separated with a predetermined interval therebetween.

In this configuration, the vibration of the vibration transmission plate13ais prevented from being transmitted to the piezoelectric element17bfixed to the vibration transmission plate13bas much as possible. Also in the right hand side as configured in the same fashion as in the left hand side, the vibration of the vibration transmission plate13bis prevented from being transmitted to the piezoelectric element17afixed to the vibration transmission plate13aas much as possible. Meanwhile, the cylindrical resilient members21aand21bare made of a rubber. Alternatively, for example, the resilient members21aand21bmay be made of a spring.

The support plate25is fixed to the housing member5by screws35. The, the vibration transmission plates13aand13bare covered with the strike surface9.

The signal lines from the piezoelectric element17ais connected to a right strike detection circuit (to be described below) of the substrate31through the through hole39aopened in the support plate25. Similarly, the signal lines from the piezoelectric element17bis connected to a left strike detection circuit (to be described below) of the substrate31.

FIG. 6is a view showing the electrical construction of the music game console1as illustrated inFIG. 1. As shown inFIG. 6, a high speed processor50, a ROM56, the right strike detection circuit52, the left strike detecting circuit54, a bus62, a video signal output terminal58and an audio signal output terminal60are mounted or implemented on the substrate31of this the music game console1.

The right strike detection circuit52includes the piezoelectric element17afrom which signals are given to an A/D converter (to be described below) of the high speed processor50. The left strike detection circuit54includes the piezoelectric element17bfrom which signals are given to the A/D converter (to be described below) of the high speed processor50. This A/D converter serves to convert the signals of the piezoelectric element17aand the piezoelectric element17binto digital signals, for example, 8 bit signals indicative of 256 signal levels. Then, the high speed processor50performs necessary processes of these signals.

Also, the high speed processor50can access the ROM56through the bus62and run a game program stored in the ROM56. Furthermore, the high speed processor50reads image data and music data stored in the ROM56and performs a necessary process of the data to generate video signals and audio signals. These video signals and audio signals as generated in this way are transmitted to the video signal output terminal58and the audio signal output terminal60respectively and output to the television monitor90through the AV cable93.

Furthermore, the high speed processor50can access an external ROM64through the bus62. Accordingly, it is possible to run a game program stored in the external ROM64and read image data and music data therefrom. This ROM64is included in the memory cartridge95ofFIG. 1and is connected to the bus62through the connector29ofFIG. 4.

FIG. 7is a circuit diagram of the right strike detecting circuit52ofFIG. 6. As shown inFIG. 7, this right strike detecting circuit52includes the piezoelectric device17a, resistance elements72,74,76and78, diodes80,81and82and capacitors70and71.

One terminal of the resistance element76is connected to one terminal of the piezoelectric element17a, respective one terminals of resistance elements74and72and one terminal of the capacitor70. The other terminal of the resistance element76is connected to the other terminal of the piezoelectric device17a, the anode of the diode81, the anode of diode80and the cathode of the diode82respectively.

The other terminal of the resistance element74is connected to a power supply VCC. The other terminal of the resistance element72is connected to a ground GND. The other terminal of the capacitor70is connected to the ground GND. The cathode of the diode80is connected to the power supply VCC. The anode of the diode82is connected to the ground GND. The cathode of the diode81is connected to one terminal of the capacitor71and one terminal of the resistance element78. In addition, the cathode of the diode81is connected to the A/D converter (to be described below) of the high speed processor50.

The diode81, the capacitor71and the resistance element78constitute a peak holding circuit83.

In this case, the piezoelectric element17agenerates a voltage signal in accordance with the pressure as applied, i.e., the strength of striking the vibration transmission plate13aby the stick96through the strike surface9. Then, the peak holding circuit83holds the peak value (peak voltage) of the voltage generated by the piezoelectric element17aand outputs the peak value to the A/D converter (to be described below) of the high speed processor50. As described below, the high speed processor50obtains the maximum value of the peak voltage output from the peak holding circuit83within one frame.

In the following, the voltage signal input to the A/D converter (to be described below) from the peak holding circuit83is referred to as a “strike signal”.

Incidentally, the circuit diagram of the left strike detection circuit54ofFIG. 6is similar to the circuit diagram of the right strike detection circuit52ofFIG. 7, and therefore such a redundant drawing is not provided.

Next, the game process will be explained with reference to several drawings showing examples of the game screen.

FIG. 8is a view showing an example of the game screen in accordance with the embodiment of the present invention. As shown inFIG. 8, the game screen is displayed on the screen91of the television monitor90. Also, after starting the game, music is output from a speaker (not shown) of the television monitor90.

This game screen includes a score display area400, a main window410and a life display area420. In the lower left area of the main window410, there is displayed a response object170L corresponding to the left batter surface2(the piezoelectric device17b) of the strike surface9. In the lower right area of the main window410, there is displayed a response object170R corresponding to the right batter surface4(the piezoelectric device17a) of the strike surface9.

Indication objects419L are displayed along the motion lane “a” in the left side of the main window410. The indication objects419L appear from the upper end of the left motion lane “a” and move downward with a predetermined acceleration along the left motion lane “a”. Similarly, indication objects419R appear from the upper end of the right motion lane “b” and move downward with a predetermined acceleration along the motion lane “b”. Here, the initial velocity and the acceleration of the indication objects419L are equal to those of the indication object419R.

When the player strikes the left batter surface2of the strike surface9by the stick96with a strength no weaker than a predetermined level, the response object170L responds to the strike, moves upwards in the screen and then returns to its base position. In the same way, when the player strikes the right batter surface4of the strike surface9by the stick96with a strength no weaker than the predetermined level, the response object170R responds to the strike, moves upwards in the screen and then returns to its base position.

Thus, if the player strikes the left batter surface2of the strike surface9in an appropriate timing by the stick96with a strength no weaker than the predetermined level, he can hit back the indication object419L by the response object170L along the left motion lane “a” in the upward direction. In the same way, if the player strikes the right batter surface4of the strike surface9in an appropriate timing by the stick96with a strength no weaker than the predetermined level, he can hit back the indication object419R by the response object170R along the right motion lane “b” in the upward direction. This point will be explained in detail.

FIG. 9is a view for explaining the hit back operation of the indication objects419L and419R by the response objects170L and170R ofFIG. 8. As shown inFIG. 9, if the player strikes the left batter surface2of the strike surface9by the stick96with a strength no weaker than a predetermined level when the indication object419L enters a best hit range r1, he can hit back the indication object419L by the response object170L in response thereto. If the player successfully hits back in the best hit range r1, the indication object419L moves in the upward direction at twice the velocity just before the hit and disappears at the upper edge of the main window410.

In the same way, if the player strikes the left batter surface2of the strike surface9by the stick96with a strength no weaker than a predetermined level when the indication object419L enters a hit range r2, he can hit back the indication object419L by the response object170L in response thereto. If the player can hit back in the hit range r2, the indication object419L moves in the upward direction at the same velocity just before the hit, and then may disappear at the upper edge of the main window410or may move down again before reaching the upper edge depending upon the velocity. Meanwhile, it is possible to repeatedly hit back the indication object419L moving down again by the response object170L.

On the other hand, if the player strikes the left batter surface2of the strike surface9with a strength no weaker than the predetermined level when the indication object419L is located outside of the best hit range r1and the hit range r2to drive the response object170L, he cannot hit back the indication object419L.

If the player fails to strikes the left batter surface2of the strike surface9with a strength no weaker than the predetermined level when the indication object419L is located within the best hit range r1or the hit range r2, the indication object419L reaches the disappearing position P and then disappears. In this case, one of the lives405displayed in the life display area420ofFIG. 8is lost (turned off). When all the lives405are turned off, the game is over.

Incidentally, the hit back operation of the indication object419R by the response object170R is same as the hit back operation of the indication object419L by the response object170L, and therefore the redundant description is dispensed with.

As has been discussed above, unless the player strikes the strike surface9by the stick96with a strength no weaker than the predetermined level, the response objects170L and170R do not respond. On the other hand, the strength of striking is judged. This point will be explained in detail.

FIG. 10is a view for explaining the strength judgment of striking the strike surface9by the stick96. As shown inFIG. 10, if the level of the strike signal, as output when the player strikes the left batter surface2of the strike surface9, exceeds a level L1, it is determined that the left batter is surface2is struck so that the response object419L responds thereto. In this case, if the level of the strike signal falls within the range between the level L1and a level L3(referred to herein as a “weak strike range”), the strike is judged as a weak strike. Also, if the level of the strike signal falls within the range of a level L2to a level L4(referred to herein as a “strong strike range”), the strike is judged as a strong strike. As described above, the player can drive the response object170L only by striking the strike surface9in order to generate a strike signal exceeding the level L1.

Meanwhile, if the level of the strike signal generated by striking the left batter surface2of the strike surface9exceeds the level L1, the high speed processor50generates and outputs a striking sound signal to the audio signal output terminal60. Accordingly, in this case, a strike sound is output from the speaker of the television monitor90(not shown in the figure). In this case, the strike sound is a percussion sound.

In the following, the level L1is sometimes referred to as an input acceptable threshold L1. Meanwhile, the above description about the strength judgment of striking the right batter surface4of the strike surface9and the sounds output in response thereto are the same as about the strength judgment of striking the left batter surface2of the strike surface9and the sounds output in response thereto, and therefore the redundant description is dispensed with.

As illustrated inFIG. 10, there is an area where the strong strike range and the weak strike range overlaps. This is because there is the possibility that the player may feel difficulty and less funny to play if the strong strike range and the weak strike range are exactly separated to make the judgment of the strength too strict.

Returning toFIG. 8, the explanation will be continued. As has been discussed above, the indication object419L moves downward along the left motion lane “a” with a predetermined acceleration. In this case, the respective intervals between the indication objects419L are set in agreement with the rhythm of music. Accordingly, if the player hits back the indication object419L in the best hit range r1, a strike is sound is output in synchronization with the rhythm of music. If the player hits back the indication object419L in the hit range r2, the timing of the strike sounds is somewhat displaced from the rhythm of music. Needless to say, the similar explanation of the indication object419L is applicable to the indication object419R.

Accordingly, it is possible for the player to make the music more sonorous and deeper with accompanying strike sounds in synchronization with the rhythm of music by striking the indication objects419L and419R in the best hit range r1.

Next, several drawings are referred to for explaining the indication given to the player by means of the indication objects419L and419R.

FIG. 11is a view showing another example of the game screen in accordance with the embodiment of the present invention. As shown inFIG. 11, the indication objects409L which are smaller in size are used to indicate that the player has to weakly strike the left batter surface2of the strike surface9. On the other hand, the indication objects411L which are larger in size are used to indicate that the player has to strongly strike the left batter surface2of the strike surface9. In a similar fashion, the indication object409R and the indication object411R are used to indicate respectively that the player has to weakly and strongly strike the right batter surface4of the strike surface9.

If the player strikes the strike surface9in the best hit range r1and with an appropriate strength as indicated, he can get many points. However, even if he strikes the strike surface9in the best hit range r1, he can get a few points unless the strength of striking is not as indicated. If the player strikes the strike surface9in the hit range r2, he cannot get many points irrespective of the strength of striking.

Incidentally, relating to the timing judgment of hitting and the strength judgment of striking, the explanation ofFIG. 9andFIG. 10is applicable even to this case.

FIG. 12is a view showing a further example of the game screen in accordance with the embodiment of the present invention. As shown inFIG. 12, the player may be indicated to repeatedly strike the left batter surface2of the strike surface9by displaying the number of consecutive strikes in the indication object413L. Then, when the indication object413L reaches the response object170L, the indication object413L stays on the response object170L for a predetermined time period. Similarly, the player may be indicated to repeatedly strike the right batter surface4of the strike surface9by displaying the number of consecutive strikes in the indication object413R (not shown in the figure). Then, when the indication object413R reaches the response object170R, the indication object413R stays on the response object170R for a predetermined time period.

Furthermore, the player may be indicated to alternately and successively strike the left batter surface2and the right batter surface4of the strike surface9by displaying the indication object415L and the indication object415R on the left motion lane “a” and the right motion lane “b” at the same time together with the numbers of consecutive strikes respectively therein. Then, when the indication object415L and the indication object415R reach the response object170L and the response object170R, the indication object415L and the indication object415R stay respectively on the response object170L and the response object170R for a predetermined time period.

The player must perform the number of consecutive strikes as indicated within the predetermined time period (i.e., during the time that the indication object413L,413R,415L or415R stays). Points are given only when the number of consecutive strikes as indicated is performed within the predetermined time period, while no point is given if the number of consecutive strikes as indicated is not performed within the predetermined time period. Incidentally, in the case of such consecutive strikes, only the input acceptable threshold L1ofFIG. 10is required of the strength of striking.

FIG. 13is a view showing a further example of the game screen in accordance with the embodiment of the present invention. As shown inFIG. 13, the player may be indicated to alternately use the pair of the sticks96to repeatedly and regularly strike the left batter surface2of the strike surface9by displaying the indication object409L alternately on the left lane “a1” and the right lane “a2” in the right and left hand sides of the left motion lane “a”. In this particular example as illustrated, the smaller indication objects409L are displayed to indicate the player to strikes weakly. Conversely, when the player is indicated to strikes strongly, the indication objects411L are displayed alternately in the right and left hand sides.

Similarly, the player may be indicated to alternately use the pair of the sticks96to repeatedly and regularly strike the right batter surface4of the strike surface9by displaying the indication object409R alternately on the left lane “b1” and the right lane “b2” in the right and left hand sides of the left motion lane “b”.

Incidentally, relating to the timing judgment of hitting and the strength judgment of striking, the explanation ofFIG. 9andFIG. 10is applicable even to this case.

Also, the player may be indicated to strike at the same time the left batter surface2and the right batter surface4of the strike surface9by displaying the indication objects411L and411R at the same time on the left motion lane “a” and the right motion lane “b”. Alternatively, for the same purpose, the indication objects409L and409R are displayed at the same time on the left motion lane “a” and the right motion lane “b”.

Next, the operation of the game machine1will be explained in detail by referring to the drawing showing the electric configuration of the game machine1in detail.

FIG. 14is a block diagram showing the high speed processor50ofFIG. 6in detail. As shown inFIG. 14, this high speed processor50includes a central processing unit (CPU)201, a graphics processor202, a sound processor203, a DMA (direct memory access) controller204, a first bus arbiter circuit205, a second bus arbiter circuit206, an internal memory207, an A/D converter (ADC: analog to digital converter), an input/output controller209, a timer circuit210, a DRAM (dynamic random access memory) refresh control circuit211, an external memory interface circuit212, a clock driver213, a PLL (phase-locked loop) circuitry214, an undervoltage detecting circuit215, a first bus218and a second bus219.

The CPU201performs various operations and controls the overall system in accordance with a program stored in a memory (the internal memory207, the ROM56or the ROM64). The CPU201is a bus master of the first bus218and the second bus219, and can access the resources connected to the respective buses.

The graphics processor202is also a bus master of the first bus218and the second bus219, and serves to generate and output video signals to the video signal output terminal58on the basis of the data stored in the inner memory207, the ROM56or the ROM64. The graphic processor202is controlled by the CPU201through the first bus218. Also, the graphic processor202has the functionality of outputting an interrupt request signal220to the CPU201.

The sound processor203is also a bus master of the first bus218and the second bus219, and generates audio signals on the basis of the data as stored in the inner memory207, the ROM56or the ROM64, and output the audio signals through the audio signal output terminal60. The sound processor203is controlled by the CPU201through the first bus218. Also, the sound processor203has the functionality of outputting an interrupt request signal220to the CPU201.

The DMA controller204serves to transfer data from the ROM56or the ROM64to the inner memory207. Also, the DMA controller204has the functionality of outputting, to the CPU201, an interrupt request signal220indicative of the completion of the data transfer. The DMA controller204is also a bus master of the first bus218and the second bus219. The DMA controller204is controlled by the CPU201through the first bus218.

The inner memory207may be implemented with appropriate one of a mask ROM, an SRAM (static random access memory) and a DRAM in accordance with the system requirements. A battery217is provided if an SRAM has to be powered by the battery for maintaining the data contained therein. In the case where a DRAM is used, the so called refresh cycle is periodically performed to maintain the data contained therein.

The first bus arbiter circuit205accepts first bus use request signals from the respective bus masters of the first bus218, performs bus arbitration among the requests for the first bus218, and issue a first bus use permission signal to one of the respective bus masters. Each bus master is permitted to access the first bus218after receiving the first bus use permission signal. InFIG. 14, the first bus use request signal and the first bus use permission signal are illustrated as first bus arbitration signals222.

The second bus arbiter circuit206accepts second bus use request signals from the respective bus masters of the second bus219, performs bus arbitration among the requests for the second bus219, and issue a second bus use permission signal to one of the respective bus masters. Each bus master is permitted to access the second bus219after receiving the second bus use permission signal. InFIG. 14, the second bus use request signal and the second bus use permission signal are illustrated as second bus arbitration signals223.

The input/output control circuit209serves to perform input and output operations of input/output signals to enable the communication with external input/output device(s) and/or external semiconductor device(s). The read and write operations of input/output signals are performed by the CPU201through the first bus218. Also, the input/output control circuit209has the functionality of outputting an interrupt request signal220to the CPU201.

The timer circuit210has the functionality of periodically outputting an interrupt request signal220to the CPU201at time intervals as preset. The setting of the timer circuit210such as the time interval is performed by the CPU201through the first bus218.

The ADC208converts analog input signals into digital signals. The digital signals are read by the CPU201through the first bus218. Also, the ADC208has the functionality of outputting an interrupt request signal220to the CPU201.

The analog strike signals as output from the right strike detection circuit52and the left strike detection circuit54are input to the ADC208and converted into digital strike signals. Accordingly, the high speed processor50performs necessary processes of these digital strike signals.

The PLL circuit214generates a high frequency clock signal by multiplication of the sinusoidal signal as obtained from a quartz oscillator216.

The clock driver213amplifies the high frequency clock signal as received from the PLL circuit214to a sufficient signal level to supply the respective blocks with the clock signal225.

The low voltage detection circuit215monitors the power potential VCC and issues the reset signal226of the PLL circuit214and the reset signal227to the other circuit elements of the entire system when the power potential VCC falls below a certain voltage. Also, in the case where the inner memory207is implemented with an SRAM requiring the power supply from the battery217for maintaining data, the low voltage detection circuit215serves to issue a battery backup control signal224when the power potential VCC falls below the certain voltage.

The external memory interface circuit212has the functionality of connecting the second bus219to the external bus62and issuing a bus cycle completion signal228of the second bus219to control the length of the bus cycle of the second bus.

The DRAM refresh cycle control circuit211periodically and unconditionally gets the ownership of the first bus218to perform the refresh cycle of the DRAM at certain intervals.

Needless to say, the DRAM refresh cycle control circuit211is provided in the case where the inner memory207includes a DRAM.

FIG. 15is a schematic representation of a program and data stored in the ROM56ofFIG. 6. As illustrated inFIG. 15, the ROM56is used to store a game program300, image data302, and music data303. The music data303includes first musical score data305, second musical score data306, third musical score data307and sound source data308.

Alternatively, the program and the data stored in the ROM56may stored in the ROM64of the memory cartridge95which is inserted into the connector29to make use of the program and the data.

Of the music data303, the first musical score data305is time-series data containing melody control information entries arranged in a time series.

FIG. 16is a schematic representation of an example of the first musical score data305ofFIG. 15. As illustrated inFIG. 16, the melody control information contains commands, note number/waiting time information, instrument designation information, velocity information, and gate time information.

In the figure, “Note On” is a command to output a sound, and “Wait” is a command to set a waiting time. The waiting time is the time period to elapse prior to reading the next command after reading the current command (the time period between one musical note and the next musical note). The note number information designates a pitch (the frequency of sound vibration). The waiting time information designates a waiting time. The instrument designation information designates a musical instrument whose tone quality is to be used. The velocity information designates a magnitude of sounds, i.e., a sound volume. The gate time information designates a period for which the output of a sound is continued.

Of the music data303, the second musical score data306is time-series data containing indication object control information items arranged in a time series. Then, the second musical score data306is used to display the indication objects409L to419R in the main window410. In other words, while the first musical score data305is musical score data to play music, the second musical score data306is musical score data to have the indication objects409L to419R appear at correct intervals in synchronization with the music.

FIG. 17is a schematic representation of an example of the second musical score data306ofFIG. 15. As shown inFIG. 17, the indication object control information contains commands, note number/waiting time information, and instrument designation information.

In the second musical score data306, the instrument designation information designates the number corresponding to the instrument relating to which the indication objects409L to419R is to be displayed rather than the instrument number (tone quality) corresponding to the instrument of which a sound is to be output. It is indicated by the instrument designation information that the second musical score data306is not musical score data for outputting music sounds but musical score data for letting the indication objects409L to419R be displayed.

Accordingly, “Note On” in this case is not a command to output a sound but a command to let the indication objects409L to419R be displayed. Also, the note number is not the information which designates a pitch (the frequency of sound vibration) but the information indicating which indication object is displayed and which motion lane is used. This point will be explained in detail.

FIG. 18is a view showing the relation between the note numbers used in the second musical score data306ofFIG. 17and the indication objects409L to419R. As shown inFIG. 18, for example, the note number “76” designates that the indication object indicative of a strong strike is displayed on the right motion lane “b” of the main window410. Also, fox example, the note number “77” designates that the indication object indicative of a strong strike is displayed on the right lane “b2” of the right motion lane “b” of the main window410.

Also, for example, the note number “72” designates that the indication object indicative of long repetition of strikes is displayed on the right motion lane “b” of the main window410. Also, for example, the note number “71” designates that the indication object indicative of long repetition of strikes is displayed on both the right motion lane “b” and the left motion lane “a” of the main window410at the same time.

On the other hand, for example, the note number “81” is a dummy data item which is placed at the head of the second musical score data306(refer toFIG. 17) but not the information indicating which indication object is displayed and which motion lane is used. In this configuration, the head of the first musical score data305is aligned with the head of the second musical score data306. Furthermore, for example, the note number “79” is a data item which is placed at the tail end of the second musical score data306to indicate the end of music (refer toFIG. 17). Meanwhile, the note number “79” is not the information indicating which indication object is displayed and which motion lane is used.

Of the music data303, the third musical score data307is time-series data containing strike sound control information items arranged in a time series.

FIG. 19is a schematic representation of an example of the third musical score data307ofFIG. 15. As shown inFIG. 19, the strike sound control information contains commands, note number/waiting time information, and instrument designation information.

The third musical score data307is not the instrument (tone quality) number corresponding to the instrument of which sound is to be output. The instrument designation information comprises a number indicating that the third musical score data307is musical score data indicative of the strike sound to be output in response to the strike of the strike surface9.

Accordingly, “Note On” in this case is not a command to output a sound but a command designating the strike sound to be output in response to the strike of the strike surface9. Also, the note number is not the information which designates a pitch (the frequency of sound vibration) but the information indicating a strike sound. The strike sound indicating information will be explained in detail.

The latest strike sound indicating information item (note number) read from the third musical score data307is registered. Then, the initial address of the waveform data and the volume information item associated with the strike sound indicating information item as registered are read from the ROM56and stored in the inner memory207. In this case, the stored strike sound setting table stored in the ROM56is referred to. Incidentally, this third musical score data is registered to change the quality of strike sound and/or the sound volume of strike sound such that the previous quality and/or sound volume of strike sound are read for outputting strike sounds.

FIG. 20is a view showing an example of the strike sound setting table stored in the ROM56ofFIG. 6. As shown inFIG. 20, the strike sound setting table is a table in which the strike sound indicating information items, the waveform data is initial addresses and the volume information items are associated with each other. The waveform data initial address and the volume information item associated with the strike sound indicating information item as registered can be acquired by referring to this strike sound setting table.

When the strike surface9is struck with a strength greater than the input acceptable threshold L1, the waveform data initial address and the volume information item associated with the strike sound indicating information item as registered are given to the sound processor203. Then, the sound processor203reads the waveform data item stored in the location pointed to by the waveform data initial address from the ROM56, generates audio signals corresponding to the waveform data and the volume information item and outputs the audio signals to the audio signal output terminal60. In this configuration, the musical tone (strike sound) corresponding to the waveform data read from the ROM56is output through the speaker (not shown in the figure) of the television monitor90at the sound volume corresponding to the volume information item. Incidentally, the waveform data is contained in the sound source data308ofFIG. 15.

Next, the main process performed by the CPU201ofFIG. 14will be explained.

[Game State Check] The game ends when the CPU201checks the state of the game and it is confirmed that the music ends or all the lives405are turned off.

[Strike Sound Setting] The CPU201reads the initial address of the waveform data associated with the strike sound indicating information item as registered and the volume information item from the ROM56, and stores them in the data area for musical tones of the inner memory207(refer toFIG. 20). This point will be explained in detail.

The strike sound indicating information is separately registered for the left batter surface2(the piezoelectric element17b) and the right batter surface4(the piezoelectric element17a) of the strike surface9. Thus, the CPU201acquires the waveform data initial addresses and the volume information items separately for the respective left batter surface2and the right batter surface4of the strike surface9. Incidentally, the strike sound setting table ofFIG. 20may be transferred from the ROM56to the inner memory207in advance of starting the game.

[Maximum Strike Signal Detection] The CPU201determines a strike signal having the maximum level (referred to as the “maximum left strike signal” in the following explanation) from among the strike signals which are input from the left strike detection circuit54in a period in which an image corresponding to one frame is displayed. Likewise, the CPU201determines a strike signal having the maximum level (referred to as the “maximum right strike signal” in the following explanation) from among the strike signals which are input from the right strike detection circuit52in a period in which an image corresponding to one frame is displayed. Here, the term “maximum strike signal” may be used to generally represent the maximum left strike signal and the maximum right strike signal.

The CPU201compares the level of the maximum left strike signal with the input acceptable threshold L1(refer toFIG. 10). If the level of the maximum left strike signal is greater than the input acceptable threshold L1, the CPU201judges that an effective left strike is made and turns on a strike accepting flag and a sound output flag corresponding to the left batter surface2(the piezoelectric element17b). Similarly, the CPU201compares the level of the maximum right strike signal with the input acceptable threshold L1(refer toFIG. 10), and judges that an effective right strike is made and turns on a strike accepting flag and a sound output flag corresponding to the right batter surface4(the piezoelectric element17a) if the level of the maximum right strike signal is greater than the input acceptable threshold L1.

Also, the CPU201judges whether or not the level of the maximum left strike signal falls within the weak strike range (refer toFIG. 10). If the level of the maximum left strike signal falls within the weak strike range, the CPU201turns on a weak strike flag corresponding to the left batter surface2. Similarly, the CPU201judges whether or not the level of the maximum right strike signal falls within the weak strike range (refer toFIG. 10), and turns on the weak strike flag corresponding to the right batter surface4if the level of the maximum right strike signal falls within the weak strike range.

Furthermore, the CPU201judges whether or not the level of the maximum left strike signal falls within the strong strike range (refer toFIG. 10). If the level of the maximum left strike signal falls within the strong strike range, the CPU201turns on a strong strike flag corresponding to the left batter surface2. Similarly, the CPU201judges whether or not the level of the maximum right strike signal falls within the strong strike range (refer toFIG. 10), and turns on the strong strike flag corresponding to the right batter surface4if the level of the maximum right strike signal falls within the strong strike range.

[Sound Generation Process In Response To Strikes] If the level of the strike signal, as output when the player strikes the left batter surface2of the strike surface9, exceeds the input acceptable threshold L1(refer toFIG. 10), i.e., if the sound output flag corresponding to the left batter surface2(the piezoelectric element17b) is turned on, the CPU201controls the sound processor203to read the waveform data initial address and the volume information item which are currently stored corresponding to the left batter surface2at that time point. Also, if the level of the strike signal, as output when the player strikes the right batter surface4of the strike surface9, exceeds the input acceptable threshold L1(refer toFIG. 10), i.e., if the sound output flag corresponding to the right batter surface4(the piezoelectric element17a) is turned on, the CPU201controls the sound processor203to read the waveform data initial address and the volume information item which are currently stored corresponding to the right batter surface4at that time point.

The sound processor203reads the waveform data stored in the location pointed to by the waveform data initial address from the ROM56, generates audio signals corresponding to the waveform data and the volume information item and outputs the audio signals to the audio signal output terminal60. In this configuration, the musical tone (strike sound) corresponding to the waveform data read from the ROM56is output through the speaker (not shown in the figure) of the television monitor90at the sound volume corresponding to the volume information item. As has been discussed above, a strike sound is output in response to a strike of the left batter surface2and also in response to a strike of the right batter surface4.

[Repeated Strike Judgment] When the indication object413L or415L (refer toFIG. 12) indicates repetition of strikes, the CPU201counts the number of effective left strikes. The indication objects413L or415L is staying on the response object170L when the repetition of strikes are indicated. A left strike is accepted as an effective left strike if the strength of striking exceeds the input acceptable threshold L1.

Similarly, when the indication object413R or415R (refer toFIG. 12) indicates repetition of strikes, the CPU201counts the number of effective right strikes. The indication objects413R and415R are staying on the response object170R when the repetition of strikes are indicated. A right strike is accepted as an effective right strike if the strength of striking exceeds the input acceptable threshold L1.

If an effective left strike is repeated for the number of times as indicated with the indication object413L or415L (refer toFIG. 12), the CPU201adds points. Similarly, if an effective right strike is repeated for the number of times as indicated with the indication object413R or415R (refer toFIG. 12), the CPU201adds points.

[Hit Judgment] When an effective left strike is performed, i.e., when the strike accepting flag corresponding to the left batter surface2(the piezoelectric element17b) is turned on, the CPU201judges whether or not the indication object409L or the indication object411L is located in the best hit range r1.

If the indication object409L indicative of a weak strike is located in the best hit range r1, the CPU201judges whether or not the indication object409L is struck with an appropriate strength as indicated with reference to the weak strike flag corresponding to the left batter surface2.

On the other hand, if the indication object411L indicative of a strong strike is located in the best hit range r1, the CPU201judges whether or not the indication object411L is struck with an appropriate strength as indicated with reference to the strong strike flag corresponding to the left batter surface2.

As a result, the CPU201adds points if the effective left strike is performed when the indication object409L is located in the best hit range r1with an appropriate strength as indicated by the indication object409L, or if the effective left strike is performed when the indication object411L is located in the best hit range r1with an appropriate strength as indicated by the indication object411L, the CPU201adds points.

When an effective right strike is performed, i.e., when the strike accepting flag corresponding to the right batter surface4(the piezoelectric element17a) is turned on, the CPU201judges whether or not the indication object409R or the indication object411R is located in the best hit range r1.

If the indication object409R indicative of a weak strike is located in the best hit range r1, the CPU201judges whether or not the indication object409R is struck with an appropriate strength as indicated with reference to the weak strike flag corresponding to the right batter surface4.

On the other hand, if the indication object411R indicative of a strong strike is located in the best hit range r1, the CPU201judges whether or not the indication object411R is struck with an appropriate strength as indicated with reference to the strong strike flag corresponding to the right batter surface4.

As a result, the CPU201adds points if the effective right strike is performed when the indication object409R is located in the best hit range r1with an appropriate strength as indicated by the indication object409R, or if the effective right strike is performed when the indication object411R is located in the best hit range r1with an appropriate strength as indicated by the indication object411R, the CPU201adds points.

Incidentally, while points are added even if a strike is performed in the best hit range r1but with a strength out of the range as indicated, the number of points as added is smaller than that are added when a strike is performed in the best hit range r1and with a strength in the range as indicated.

Also, when an effective left strike is performed, the CPU201judges whether or not the indication object409L or the indication object411L is located in the hit range r2. Similarly, when an effective right strike is performed, the CPU201judges whether or not the indication object409R or the indication object411R is located in the hit range r2. If either indication object is located in the hit range r2as a result of the judgment, the CPU201adds points. In this case, however, the number of points as added is smaller than that are added when a strike is performed in the best hit range r1and with a strength in the range as indicated.

Incidentally, if the indication object409L or the indication object411L is located in the best hit range r1when an effective left strike is performed, a best hit flag corresponding to the left batter surface2is turned on. Similarly, if the indication object409R or the indication object411R is located in the best hit range r1when an effective left strike is performed, a best hit flag corresponding to the right batter surface4is turned on.

Also, if the indication object409L or the indication object411L is located in the hit range r2when an effective left strike is performed, a hit flag corresponding to the left batter surface2is turned on. Similarly, if the indication object409R or the indication object411R is located in the hit range r2when an effective left strike is performed, a hit flag corresponding to the right batter surface4is turned on.

[indication Object Registration] The CPU201reads and interprets the indication object control information ofFIG. 17while incrementing the musical score data pointer for the registration of indication objects. In this case, the musical score data pointer for the registration of indication objects is a pointer pointing to the location to be accessed for reading the second musical score data306.

Then, if the command contained in the indication object control information as read is “Note On”, the CPU201registers the note number contained in that indication object control information. This is the process to register a new indication object.

[Strike Sound Indicating Information Registration] The CPU201reads and interprets the strike sound control information ofFIG. 19while incrementing the musical score data pointer for the registration of the strike sound indicating information. In this case, the musical score data pointer for the registration of the strike sound indicating information is a pointer pointing to the location to be accessed for reading the third musical score data307.

Then, if the command contained in the strike sound control information as read is “Note On”, the CPU201registers the note number contained in that strike sound control information. This is the process to register the strike sound indicating information.

[Indication Object Control] the CPU201controls displaying the indication objects409L to419R in the main window410. More specific description is as follows. The control of displaying the indication object409L is described as an example.

In the case where a new indication object409L is registered, the CPU201stores, in the inner memory207, coordinate data indicative of the location where the indication object409L appears and the storage location information of the image data of the indication object409L. Then, the CPU201gives the coordinate and image data to the graphics processor202during the vertical blanking period.

The graphics processor202reads the image data of the indication object409L from the ROM56with reference to the storage location information as given, generates video signals on the basis of the image data and the coordinate data as given, and outputs the video signals to the video signal output terminal58. By this process, a new indication object409L appears in the main window410.

Then, the CPU201calculates the coordinates of the indication object409L, which is being displayed, on the basis of a predetermined acceleration and a predetermined initial velocity. Then, the CPU201gives the graphics processor202the storage location information of the image data of the indication object409L and the coordinate data as calculated during the vertical blanking period.

The graphics processor202reads the image data of the indication object409L from the ROM56with reference to the storage location information as given, generates video signals on the basis of the image data and the coordinate data as given, and outputs the video signals to the video signal output terminal58. By this process, the indication object409L as moved is displayed in the main window410.

Also, if the indication object409L is located in the best hit range r1when the strike accepting flag corresponding to the left batter surface2is turned on (i.e., an effective left strike is performed), the CPU201performs coordinate calculation of the indication object409L for moving the indication object409L at twice the velocity of the indication object409L just before the strike. In this case, the acceleration is set to zero. Then, the CPU201gives the graphics processor202the storage location information of the image data of the indication object409L and the coordinate data as calculated during the vertical blanking period.

The graphics processor202reads the image data of the indication object409L from the ROM56with reference to the storage location information as given, generates video signals on the basis of the image data and the coordinate data as given, and outputs the video signals to the video signal output terminal58. By this process, the indication object409L hit back at the twice velocity is displayed in the main window410.

Also, if the indication object409L is located in the hit range r2when the strike accepting flag corresponding to the left batter surface2is turned on (i.e., an effective left strike is performed), the CPU201performs coordinate calculation of the indication object409L for moving the indication object409L at the velocity of the indication object409L just before the strike as the initial velocity. In this case, the direction of acceleration is the same as the falling acceleration of the indication object409L. Then, the CPU201gives the graphics processor202the storage location is information of the image data of the indication object409L and the coordinate data as calculated during the vertical blanking period.

The graphics processor202reads the image data of the indication object409L from the ROM56with reference to the storage location information as given, generates video signals on the basis of the image data and the coordinate data as given, and outputs the video signals to the video signal output terminal58. By this process, the indication object409L hit back at the velocity just before the strike is displayed in the main window410. Since this acceleration has the same direction as the falling acceleration of the indication object409L, the indication object409L may fall again depending upon the velocity just before the strike.

When the indication object409L reaches a disappearing position P (refer toFIG. 9), the CPU201sets the coordinates of the indication object409L out of the screen91. By this process, the indication object409L disappears from the game screen. In addition to this, when the indication object409L reaches the disappearing position P (refer toFIG. 9), the CPU201turns off one of the lives405.

Meanwhile, the control of displaying the indication object409L is applicable to the control of displaying the indication objects411L to419L and409R to419R in the main window410. However, the indication objects413L,413R,415L and415R are not hit back, but staying on the response objects170L and170R for a predetermined period and then disappear.

[Response Object Control] When an effective left strike is performed (i.e., the strike accepting flag corresponding to the left batter surface2is turned on), the CPU201moves the response object170L for a predetermined distance in the upward direction. In other words, when an effective left strike is performed, the CPU201performs coordinate calculation with a constant velocity in the upward direction.

On the other hand, when the best hit flag or the hit flag corresponding to the left batter surface2is turned on or when the response object170L is moved for a predetermined distance in the upward direction, the CPU201performs coordinate calculation with a constant velocity in the is downward direction in order to put the response object170L back into the base position.

Then, the CPU201gives the graphics processor202the storage location information of the image data of the response object170L and the coordinate data as calculated during the vertical blanking period.

The graphics processor202reads the image data of the response object170L from the ROM56with reference to the storage location information as given, generates video signals on the basis of the image data and the coordinate data as given, and outputs the video signals to the video signal output terminal58. By this process, the response object170L as moved is displayed in the main window410.

When the repetition of strikes are indicated (when the indication object413L or the indication object415L is staying on the response object170L), the response object170L is staying in its base position without moving.

The control of displaying the response object170L is applicable to the control of displaying the response object170R, and therefore the redundant description is dispensed with.

[Playback of Melody] The playback of melody is performed by an interrupt operation. The CPU201reads and interprets the melody control information ofFIG. 16while incrementing the musical score data pointer for the playback of melody. In this case, the musical score data pointer for the playback of melody is a pointer pointing to the location to be accessed for reading the first musical score data305.

Then, if the command contained in the melody control information as read is “Note On”, the CPU201stores, in the data area for musical tones of the inner memory207, the pitch (the frequency of sound vibration) corresponding to the note number contained in the melody control information and the initial address of the waveform data corresponding to the instrument (tone quality) designated by the instrument designation information.

Also, if the command contained in the melody control information as read is “Note On”, the CPU201stores, in the data area for musical tones of the inner memory207, the pitch control information of the pitch (the frequency of sound vibration) corresponding to the note number contained in the melody control information and the volume information item contained in the melody control information.

Here, the pitch control information will be explained. The pitch control information is used to perform the pitch conversion by changing the frequency of reading the waveform data. Namely, the sound processor203periodically reads the pitch control information at a certain period and accumulates the pitch control information. The sound processor203makes use of the result of accumulation as the address pointer of waveform data. Accordingly, if a large value is set as a pitch control information, the address pointer is quickly incremented by the large value to increase the frequency of the waveform data. Conversely, if a small value is set as a pitch control information, the address pointer is slowly incremented by the small value to decrease the frequency of the waveform data. In this way, the sound processor203performs the pitch conversion of the waveform data.

By the way, the sound processor203reads from the ROM56the waveform data, which is stored in the area pointed to by the initial address read from the data area for musical tones, while incrementing the address pointer on the basis of the pitch control information read from the data area for musical tones. Then, the sound processor203generates audio signals by multiplying the waveform data, as sequentially read, by the volume information item. In this way, audio signals indicative of the tone quality of the musical instrument, the pitch (the frequency of sound vibration) and the sound volume designated by the first musical score data305is output to the audio signal output terminal60.

On the other hand, the CPU201manages the gate times contained in the melody control information as read. Accordingly, when a gate time elapses, the CPU201instructs the sound processor203to stop outputting the sound corresponding to the gate time. In response to this, the sound processor203terminates the sound output as instructed.

Melody is produced on the basis of the first musical score data305ofFIG. 16, as has been discussed above, and output from the speaker (not shown in the figure) of the television monitor90.

Next, an example of the process flow of the game machine1will be explained with reference to several flow charts. In this example, the indication objects419L and419R ofFIG. 8are not explained.

FIG. 21is a flowchart showing the overall process flow of the game machine1. As shown inFIG. 21, the CPU201performs the initial setup of the system in step S1.

In step S2, the CPU201checks the state of the game. In step S3, the CPU201acquires the initial address of the waveform data and the volume information item associated with the strike sound indicating information item as registered with reference to the strike sound setting table of the ROM56(refer toFIG. 20).

In step S4, the CPU201detects the maximum value of the strike signals (maximum strike signal) in one frame. In step S5, the CPU201compares the maximum strike signal and the input acceptable threshold L1and judges whether or not an effective strike is performed. In addition, the CPU201judges whether or not the maximum strike signal falls within the strong strike range and whether or not falls within the weak strike range.

In step S6, the CPU201judges whether or not a strike is performed in the best hit range r1and whether or not a strike is performed in the hit range r2. In addition, the CPU201judges whether or not a strike is performed with a strength as indicated. When the indication of the repetition of strikes is confirmed in step S7, the CPU201starts counting strikes by the player and judges whether or not the predetermined number of strikes are performed.

In step S8, the CPU201takes control of the motion of the indication objects409L,409R to415L and415R in the main window410. In step39, the CPU201takes control of the motion of the response objects170L and170R in the main window410.

In step S10, it is determines whether or not the CPU201waits for the video system synchronous interrupt. In the case of the present embodiment, the CPU201supplies the graphics processor202with the image information for refreshing the display screen of the television monitor90after the vertical blanking period starts. Accordingly, after completing the arithmetic operations for use in refreshing the display screen, the CPU201refrains from proceeding its operation until the next video system synchronous interrupt is issued.

Namely, while it is “YES” in step S10, i.e., while the CPU201waits for a video system synchronous interrupt (there is no interrupt signal responsive to the video system synchronous signal), the process repeats the same step S10. On the other hand, if it is “NO” in step S10, i.e., if the CPU201gets out of the state of waiting for a video system synchronous interrupt (i.e., the CPU201is given a video system synchronous interrupt), the process proceeds to step S11. In step S11, the CPU201supplies the graphics processor202with the image information (the storage location information of the image data and the coordinate data thereof) for refreshing the display screen.

FIG. 22is a flowchart showing the process flow in the initial setting in step S1ofFIG. 21. As shown inFIG. 22, the CPU201initializes the musical score data pointer for melody in step S15. In step S16, the CPU201sets an execution stand-by counter for melody to “t”.

In step S17, the CPU201initializes the musical score data pointer for registering an indication object. In step S18, the CPU201sets an execution stand-by counter for registering an indication object to “0”.

In step S19, the CPU201initializes the musical score data pointer for registering strike sound indicating information. In step S20, the CPU201sets an execution stand-by counter for registering strike sound indicating information to “0”.

In step S21, the CPU201initializes various flags and various counters. In step S22, the CPU201sets the timer circuit210as a source of generating an interrupt request signal for generating a sound, and the process proceeds to step S2ofFIG. 21.

In this case, it is for the following reason that the execution stand-by counter for melody is set to “t” and that the execution stand-by counter for registering an indication object is set to “0”.

Namely, this is because it takes a certain period for the indication object411R to enter the best hit range r1after appearing at the uppermost edge of the right motion lane “b” of the main window410as illustrated inFIG. 11, and therefore the indication object411R must be displayed at the certain period earlier to compensate this differential time. In other words, the musical score data for registering an indication object is read out at the certain period (a counter value “t”) earlier than for melody. The execution stand-by counter for registering an indication object, the execution stand-by counter for melody and the execution stand-by counter for registering strike sound indicating information serve to count down.

FIG. 23is a flowchart showing the process flow of checking the state of the game in step S2ofFIG. 21. As shown inFIG. 23, the CPU201checks the number of existing lives405in step S25. If the number of existing lives405is “0”, the CPU201terminates the game (in step S26). Conversely, if the number of existing lives405is not “0”, i.e., if there is an existing life405, the CPU201proceeds to step S27(in step S26).

In step S27, the CPU201checks whether or not the music ends with reference to a music end flag to be described below. If the music does not end, the CPU201proceeds to step S3ofFIG. 21(in step S28). Conversely, if the music ends, the CPU201proceeds to step S29(in step S28).

In step S29, the CPU201adds a score P1and a score P2together to obtain a score P. This score P is displayed in the score display area400ofFIG. 11toFIG. 13.

As has been discussed above, in the case of this embodiment, the game ends when the music ends or when all the lives405are turned off.

FIG. 24is a flowchart showing the process flow of setting a strike sound in step S3ofFIG. 21. As shown inFIG. 24, the process of step S31to step S34is repeated for two times between step S30and step35. In this case, “i” set to “1” means that the process is performed for the left batter surface2(the piezoelectric element17b) while “i” set to “2” means that the process is performed for the right batter surface4(the piezoelectric element17a).

In step S31, the CPU201checks the strike sound indicating information H[i] which is currently registered. If the strike sound indicating information H[i] is not changed, the CPU201proceeds to step S35(in step S32). Conversely, if the strike sound indicating information H[i] is changed, the CPU201proceeds to step S33(in step S32).

In step S33, the CPU201refers to the strike sound setting table (refer toFIG. 20) stored in the ROM56. In step S34, the CPU201reads, from the ROM56, the waveform data initial address and the volume information item associated with the strike sound indicating information H[i] which is currently registered, and stores them in the inner memory207. More specifically speaking, the waveform data initial address is stored in an array element A[i] while the volume information item is stored in an array element V[i].

After completing step S35, the CPU201proceeds to step S4ofFIG. 21.

FIG. 25is a flowchart showing the flow of the maximum strike signal detection process of step S4ofFIG. 21. As shown inFIG. 25, the process of step S40to step S46is repeated for two times between step S39and step47. Here, the meaning of “i” is the same as that inFIG. 24.

In step S40, the CPU201clears the previous value MAX[i] of the maximum strike signal. In step S41, the CPU201assigns “1” to “M”.

In step S42, the CPU201compares the maximum MAX[i] of the previous strike signals and the latest strike signal. Incidentally, if “M” is “1”, the latest strike signal is assigned to the maximum MAX[i].

The CPU201proceeds to step S45(in step S43) if the latest strike signal is no larger than the maximum value MAX[i]. Contrary to this, the CPU201proceeds to step S44(in step S43) if the latest strike signal is larger than the maximum value MAX[i].

In step S44, the CPU201updates the maximum value MAX[i] of the strike signals to the latest strike signal value. In step S45, the CPU201increments “M” by one.

If “M” is smaller than a predetermined value m, the CPU201proceeds to step S42(in step S46). On the other hand, if “M” is no smaller than the predetermined value m, the CPU201proceeds to step S47(in step S46).

Here, the predetermined value m is the number of times that a strike signal is input to the ADC208. This number of times is the number of times per frame. Accordingly, it is possible to detect the maximum value of the strike signals input in each frame (the maximum strike signal) by performing the above process.

The CPU201performs step S5ofFIG. 21after completing step S47.

FIG. 26is a flowchart showing the process flow of judging the strength of striking in step S5ofFIG. 21. As shown inFIG. 26, the process of step S50to step S58is repeated for two times between step S49to step S59. In this flowchart, the index “i” has the same meaning as inFIG. 24.

In step S50, the CPU201compares the maximum strike signal value MAX[i] and the input acceptable threshold L1. If the maximum strike signal is no larger than the input acceptable threshold L1, the CPU201proceeds to step S59(in step S51). On the other hand, the maximum strike signal is larger than the input acceptable threshold L1, the CPU201proceeds to step S52(in step S51).

In step S52, the CPU201turns on the strike accepting flag AF[i] and the sound output flag SF[i]. In step S53, the CPU201judges whether or not the maximum strike signal value MAX[i] falls within the weak strike range. The CPU201proceeds to step S56(in step S54) if the maximum strike signal value MAX[i] is out of the weak strike range. Contrary to this, if the maximum strike signal value MAX[i] falls within the weak strike range, the CPU201proceeds to step S55(in step S54). In step S55, the CPU201turns on the weak strike flag F1[i].

In step S56, the CPU201judges whether or not the maximum strike signal value MAX[i] falls within the strong strike range. The CPU201then proceeds to step S59(in step S57) if the maximum strike signal value MAX[i] is out of the strong strike range. On the other hand, if the maximum strike signal value MAX[i] falls within the strong strike range, the CPU201proceeds to step S58(in step S57). In step S58, the CPU201turns on the strong strike flag F2[i] and proceeds to step S59.

The CPU201proceeds to step S6ofFIG. 21after step S59is completed.

FIG. 27is a flowchart showing the flow of the hit judgment process of step S6ofFIG. 21. As shown inFIG. 27, the process of step S61to step S76is repeated for two times between step S60and step77. In this flowchart, the index “i” has the same meaning as inFIG. 24.

In step S61, the CPU201checks a strike repetition flag CF[i]. In this case, the strike repetition flag CF[i] is a flag which is turned on when the repetition of strikes are indicated and turned off when the repetition of strikes are not indicated. More specifically speaking, the strike repetition flag CF[i] is turned on during the period that the indication object413L,413R,415L of415R is staying on the response object170L or170R.

When strike repetition flag CF[i] is turned on, the CPU201proceeds to step S77(in step S62). On the other hand, when strike repetition flag CF[i] is turned off, the CPU201proceeds to step S63(in step S62).

In step S63, the CPU201checks the strike accepting flag AF[i]. When the strike accepting flag AF[i] is turned off, the CPU201proceeds to step S77(in step S64). On the other hand, when the strike accepting flag AF[i] is turned on, the CPU201proceeds to step S65(in step S64).

In step S65, the CPU201judges whether or not there is an indication object in the best hit range r1. If there is an indication object in the best hit range r1, the CPU201proceeds to step S67(in step S66). On the other hand, if there is no indication object in the best hit range r1, the CPU201proceeds to step S73(in step S66).

In step S67, the CPU201judges whether or not the strike surface9is struck with a strength as indicated with reference to the weak strike flag F1[i] and the strong strike flag F2[i]. If the indication object is struck with a strength as indicated, the CPU201proceeds to step S69, otherwise proceeds to step S70(in step S68).

In step S69, the CPU201adds one hundred points to the score P1. On the other hand, in step S70, the CPU201adds 50 points to the score P2. In step S71, the CPU201turns on the best hit flag BF[i].

On the other hand, in step S73, the CPU201judges whether or not there is an indication object in the hit range r2. If no indication object is located in the hit range r2, the CPU201proceeds to step S72, and conversely if there is an indication object in the hit range r2, the CPU201proceeds to step S75(in step S74). In step S75, the CPU201adds 50 points to the score P2. In step S76, the CPU201turns on the hit flag HF[i].

In step S72, the CPU201turns off the weak strike flag F1[i] and the strong strike flag F2[i]. The CPU201proceeds to step S7ofFIG. 21after step S77is completed.

FIG. 28is a flowchart showing the flow of the strike repetition judgment process of step S7ofFIG. 21. As shown inFIG. 28, the process of step S79to step S87it is repeated a process of between step S78and step88. In this flowchart, the index “i” has the same meaning as inFIG. 24.

In step S79, the CPU201checks the strike repetition flag CF[i]. If the strike repetition flag CF[i] is turned off, the CPU201proceeds to step S87while the strike repetition flag CF[i] is turned off the CPU201proceeds to step S81(in step S80). In step S87, the CPU201reset a counter as C[i]=0.

On the other hand, in step S81, the CPU201checks the strike accepting flag AF[i]. If the strike accepting flag AF[i] is turned off, the CPU201proceeds to step S88while if it is turned on, the CPU201proceeds to step S83(in step S82).

In step S83, the CPU201increments the counter by one as (C[i]=C[i]+1). If the count value C[i] is equal to the number K of consecutive strikes as indicated by an indication object, the CPU201proceeds to step S85, otherwise proceeds to step S88(in step S84).

In step S85, the CPU201adds one hundred points to the is score P1. In step S86, the CPU201reset a counter as C[i]=0.

The CPU201proceeds to step S8ofFIG. 21after step S88is completed. As has been discussed above, the number of times that the player repeats striking is counted while points are added if the predetermined number of strikes are performed.

FIG. 29is a flowchart showing the process flow of displaying indication objects in step S8ofFIG. 21. As shown inFIG. 29, the process of step S180to step S185is repeated for two times between step S179and step S186. In this flowchart, the index “i” has the same meaning as inFIG. 24.

If the best hit flag BF[i] is turned on, the CPU201proceeds to step S181while if turned off the CPU201proceeds to step S182(in step S180). In step S181, the CPU201sets the initial velocity of the corresponding indication object to twice the velocity just before hitting. By this setting, the indication object which is hit in the best hit range r1is returned at twice the velocity just before hitting.

On the other hand, in the case where the best hit flag BF[i] is turned off, if the hit flag HF[i] is turned off the CPU201proceeds to step S183, and if the hit flag HF[i] is turned on the CPU201proceeds to step S184(in step S182).

In step S183, the CPU201sets the initial velocity of the corresponding indication object to the velocity just before hitting. By this setting, the indication object which is hit in the hit range r2is returned at the velocity just before hitting.

On the other hand, while the hit flag HF[i] is turned off, if the indication object reaches the disappearing position P (refer toFIG. 9), the CPU201proceeds to step S185, otherwise proceeds to step S186(in step S184). In step S185, the CPU201turns off one of the lives405.

After the process between step S179and step S186is performed for two times, in step S187, the CPU201performs the process of updating the positions of indication objects. More specifically speaking, the CPU201calculates and sets new coordinates on the basis of the velocity obtained in step S181or step S183, or sets the coordinates of the indication object that reaches the disappearing position P out of the screen91. Also, the CPU201calculates anew the coordinates of the indication objects which are moving.

In step S188, the CPU201checks whether or not there is registered a new indication object. If there is registered no new indication object, the CPU201proceeds to step S9ofFIG. 21(in step S189). Conversely, if there is registered a new indication object, the CPU201proceeds to step S190(in step S189). In step S190, the CPU201performs necessary processes required for displaying the new indication object, such as setting the coordinates thereof, and then proceeds to step S9ofFIG. 21.

FIG. 30is a flowchart showing the process flow of displaying the response objects in step S9ofFIG. 21. As shown inFIG. 30, the process of step S290to step S299is repeated for two times between step S289and step S300. In this flowchart, the index “i” has the same meaning as inFIG. 24.

If the strike accepting flag AF[i] is turned on, the CPU201proceeds to step S297, otherwise proceeds to step S291(in step S290).

If the response object is moving, the CPU201proceeds to step S292, otherwise proceeds to step S300(in step S291).

If the best hit flag BF[i] is turned on, the CPU201proceeds to step S293, otherwise proceeds to step S295(in step S292).

If the hit flag HF[i] is turned on, the CPU201proceeds to step S293, otherwise proceeds to step S296(in step S295).

If the moving response object reaches its highest position, the CPU201proceeds to step S293, otherwise proceeds to step S300(in step S296).

In step S293, the CPU201sets the coordinates of the response object in order that the response object returns to its base position. In other words, the process of returning the response object to its base position is performed when the response object hits an indication object or reaches its highest position. In step S294, the CPU201turns off the best hit flag BF[i] and the hit flag HF[i].

In the case where the strike accepting flag AF[i] is turned on, if the strike repetition flag CF[i] is turned on the CPU201proceeds to step S299, otherwise proceeds to step S298(in step S297).

In step S298, the CPU201sets the coordinates of the response object in order to move the response object. In other words, when an effective strike is performed, the response object is moved in response to this. In step S299, the CPU201turns off the strike accepting flag AF[i].

CPU201proceeds to step S10ofFIG. 21after step S300is completed.

FIG. 31is a flowchart showing the interrupt handling process flow. As shown inFIG. 31, the high speed processor50is operated to play a melody in step S500. In step S600, the CPU201performs the process of registering an indication object. In step S700, the CPU201performs the process of registering strike sound indicating information. In step S800, the high speed processor50performs the process of generating a sound triggered by the strike of the strike surface9.

FIG. 32is a flowchart showing the process flow of playing a melody in step S500ofFIG. 31. As shown inFIG. 32, the CPU201checks the execution stand-by counter for playing a melody in step S501. If the value of the execution stand-by counter for melody is “0” the process proceeds to step S503, otherwise proceeds to step S510(in step S502).

In step S510, the CPU201decrements the execution stand-by counter for melody.

On the other hand, in step S503, the CPU201reads and interprets the command pointed to by the musical score data pointer for melody. The process proceeds to step S505if the command is “Note On” (in step S502). On the other hand, if the command is not “Note On”, i.e., is “Stand-by”, the process proceeds to step S511.

In step S511, the CPU201sets a waiting time to the execution stand-by counter for melody. On the other hand, in step S505, the CPU201stores the waveform pitch control information, the initial address information of waveform data in the data area for musical tones of the inner memory207in accordance with the note number and the instrument designation information pointed to by the musical score data pointer, and stores the channel volume information corresponding to the velocity information and the gate time information in the data area for musical tones. The CPU201then instructs the sound processor203to access the inner memory207. In response to this, the sound processor203reads the above information as stored in the data area for musical tones of the inner memory207in the appropriate timing, and generates audio signals.

In step S506, the CPU201increments a musical score data pointer for melody. In step S507, the CPU201checks the remaining time of the musical notation gate time. If the gate time elapses in step S508, the CPU201proceeds to step S509, instructs the sound processor203to stop outputting the sound corresponding to the musical notation mark, and then proceeds step S510. On the other hand, if the gate time does not elapse in step S508, the process proceeds to step S510.

In step S512, the CPU201determines whether or not the process in step S507is completed for all the musical notation marks being output, and if not completed the process proceeds to step S507otherwise proceeds to step S600ofFIG. 31.

FIG. 33is a flowchart showing one example of the indication object registration process in step S600ofFIG. 31. As shown inFIG. 33, in step S601, the CPU201checks the execution stand-by counter for registering an indication object. The process proceeds to step S603if the execution stand-by counter for registering an indication object is “0”, otherwise proceeds to step S609(in step S602).

In step S609, the CPU201decrements the execution stand-by counter for registering an indication object. On the other hand, in step S603, the CPU201reads and interprets a command pointed to by the musical score data pointer for registering an indication object.

The process proceeds to step S605if the command is “Note On” (in step S604). Conversely, if the command is not “Note On”, i.e., is “Stand-by”, the process proceeds to step S610.

In step S610, the CPU201sets a stand-by time to the execution stand-by counter for registering an indication object. On the other hand, in the case where the command is “Note On”, the process proceeds to step S611if the note number is indicative of the end of music, otherwise proceeds to S606(in step S605). In step S611, the CPU201turns on the is music end flag.

On the other hand, if the note number is indicative of the start of music, the process proceeds to step S608, otherwise proceeds to step S607(in step S606). In step S607, the CPU201registers a new indication object. In step S608, the CPU201increments the musical score data pointer for registering an indication object. Then, the process proceeds to step S700ofFIG. 31.

FIG. 34is a flowchart showing the flow of the strike sound indicating information registration process of step S700ofFIG. 31. As shown inFIG. 34, the CPU201checks the execution stand-by counter for registering strike sound indicating information in step S701. The process proceeds to step S703if the execution stand-by counter for registering strike sound indicating information is “0”, otherwise proceeds to step S707(in step S702).

In step S707, the CPU201decrements the execution stand-by counter for registering strike sound indicating information. On the other hand, in step S703, the CPU201reads and interprets a command pointed to by the musical score data pointer for registering strike sound indicating information. The process proceeds to step S705if the command is “Note On” (in step S704). Conversely, if the command is not “Note On”, i.e., is “Stand-by”, the process proceeds to step S708.

In step S708, the CPU201sets a stand-by time to the execution stand-by counter for registering strike sound indicating information. On the other hand, in step S705, the CPU201registers the strike sound indicating information. More specifically speaking, an array element H[1] is used to store the strike sound indicating information corresponding to the left batter surface2(the piezoelectric element17b) while an array element H[2] is used to store the strike sound indicating information corresponding to the right batter surface4(the piezoelectric element17a).

In step S706, the CPU201increments the musical score data pointer for registering strike sound indicating information. Then, the process proceeds to step S800ofFIG. 31.

FIG. 35is a flowchart showing the flow of the sound generation process in response to a strike in step S800ofFIG. 31. As shown inFIG. 35, the process of step S801to step S803is repeated for two times between step S800and step S804. In this flowchart, the index “i” has the same meaning as inFIG. 24.

The CPU201proceeds to step S804if the sound output flag SF[i] is turned off and proceeds to step S802if the sound output flag SF[i] is turned on (in step S801). In step S802, the CPU201has the sound processor203read the waveform data initial address A[i] and the volume information item V[i] stored in the data area for musical tones, and perform the output of the strike sound.

In step S803, the CPU201turns off the sound output flag SF[i]. As has been discussed above, when the sound output flag SF[i] is turned on, i.e., when an effective strike is performed on the strike surface9, a strike sound is output in response to it.

Next, one example of the method of providing the first musical score data305, the second musical score data306and the third musical score data307will be explained.

For this purpose, performance information (sound pitch (i.e., note number), the magnitude of sound (i.e., velocity), the length of tone (i.e., gate time), the tone quality (i.e., instrument designation information) and the time-series information indicative of the numerical timings of the respective musical notes and the like) for playing melody is prepared in conformity with the MIDI (Musical Instrument Digital Interface) standard. In this case, it is generally easy to generate such performance data by making use of computer aided composing software capable of outputting data in MIDI format. The first musical score data305ofFIG. 16can be prepared by the use of the performance data as generated with the software. In this case, the stand-by time is calculated with reference to the timing information of musical notes. Alternatively, it is possible to design the music game console1capable of playing melody with the performance data, as it is, which has been prepared in conformity with the MIDI standard.

The second musical score data306ofFIG. 17is generated on the basis of performance data prepared in conformity with the MIDI standard in the same manner as the first musical score data305. In this case, the note number is not the information which designates a pitch but the information designating the type of the indication object (refer toFIG. 18). In other words, musical notes of the MIDI data are used for determining the appearance of an indication object. By making use of musical notes in this way, a widely distributed computer aided composing software product can be used to prepare performance data for displaying indication objects with ease. The information about the magnitude of sound and the length of tone contained in the performance data for displaying indication objects is not used for displaying indication objects, and therefore arbitrary values (predetermined values) can be set to the corresponding fields. Alternatively, it is possible to design the music game console1capable of making use of the performance data itself, as the musical score data for displaying indication objects, which has been prepared in conformity with the MIDI standard.

The third musical score data307ofFIG. 19is generated on the basis of performance data prepared in conformity with a MIDI standard in the same manner as the first musical score data305. In this case, the note number is not the information which designates a pitch but the information designating the tone quality of strike sound. In other words, musical notes of the MIDI data are used for designating the tone quality of strike sound. By making use of musical notes in this way, a widely distributed computer aided composing software product can be used to prepare the information for designating the tone quality of strike sound with ease. The information about the magnitude of sound and the length of tone contained in the information for designating the tone quality of strike sound is not used for designating the tone quality of strike sound, and therefore arbitrary values (predetermined values) can be set to the corresponding fields. Alternatively, it is possible to design the music game console1capable of making use of the performance data itself, as the musical score data for designating the tone quality of strike sound, which has been prepared in conformity with the MIDI standard.

The following is a description of one exemplary method of generating the musical score data for use in the present invention from MIDI data. First, a Standard MIDI file containing two or more tracks is prepared by a known method. One of the tracks (for example, a percussion instrument part) corresponds to the second musical score data306. For example, a MIDI file can be generated by inputting musical notes to a computer with a mouse, a MIDI instrument or a microphone (using a microphone-to-score entry utility). In the case where there is available a sheet music including a percussion instrument part, it can be scanned and transcribed into a MIDI file by an appropriate image analysis utility. In this case, the percussion instrument part can be used for the player's part as the second musical score data306.

The second musical score data can be modified by editing it, in order to add striking criteria by hands or in accordance with a predetermined algorithm, for example, on the basis of the downbeat and upbeat. The striking criterion is related to at least one the strength of striking and the number of times of repeating strikes.

Furthermore, it is possible to distribute the music data303and, if necessary, the image data302and/or the game program300, through the Internet to meet user's diverse needs.

One example of such distribution is described, for example, in Japanese patent application No. 2003-270850 filed on Jul. 4, 2003 by the present applicant, and PCT Application No. PCT/JP2004/009763 corresponding thereto filed on Jul. 2, 2004.

As has been discussed above, since indication objects are displayed at the intervals in agreement with the rhythm of music in the case of the present embodiment, musical tones can be output in synchronization with music by performing strikes in the appropriate timing as indicated by indication objects. By this process, the player can join automatic music performance while enjoying the game. As a result, it is possible to provide a game machine which is more funny and does not satiate the player's interest.

Also, the musical tone output in response to a strike by the player can be designated by tone quality designation information (the note number is used for this purpose in the above embodiment) such that a variety of musical tones can be output. Accordingly, the player can enjoy a music game, while joining changeful automatic performance, only with a single music game console. This differs substantially from conventional percussion instruments. Namely, while a conventional percussion instrument can output sounds only of predetermined tone quality (qualities) corresponding to the conventional percussion instrument, it is possible in the case of the present invention to change the tone quality of the strike sound from one to another.

For example, in the case of a conventional percussion instrument having two batter surfaces (corresponding to the left batter surface2and the right batter surface4in the case of the present embodiment), the strike sounds as output are predetermined corresponding to these two batter surfaces. However, in the case of the present embodiment, the tone quality of strike sounds can be changed in a time series by the use of the third musical score data307irrespective of the number of the batter surfaces (even if only a single batter surface is available).

In addition to this, in accordance with the present embodiment, it is possible to give various indications to the player by changing the way of displaying the indication object. As a result, by making use of various ways of indicating, it is possible to provide a plurality of difficulty levels of the game and wide variations in playing the game. Furthermore, by making use of various ways of providing indications, the player can join changeful automatic performance.

In the above example, while the strength of striking is indicated, the number of times of repeating strikes is displayed in the respective indication objects. However, the way of providing indications by an indication object is not limited thereto. For example, the color or profile of an indication object may be changed for this purpose.

Also, in the case of the present embodiment, there are two piezoelectric elements provided for detecting strikes. By providing a plurality of piezoelectric elements in this manner, is it is possible to detect strikes on a plurality of batter surfaces by the player corresponding to the number of the piezoelectric elements. Accordingly, it is possible to make the game more attractive by effectively utilizing the plurality of batter surfaces to be selectively struck by the player. As a result, while diversified musical tones can be output in response to strikes, diversified game programs can be implemented. For example, the piezoelectric device may be made of any type of a vibration sensor.

Also, in accordance with the present embodiment, the vibration transmission plates13aand13bare supported respectively on the support plate25by the resilient members21aand21bsuch that they are prevented from coming in contact with each other. In this configuration, the vibration of the vibration transmission plate13ais prevented from being transmitted to the vibration transmission plate13bas much as possible. That is, it is avoided as much as possible that the piezoelectric element17bmounted on the vibration transmission plate13bdetects the vibration of the vibration transmission plate13ato output signals which must not be output. Contrary to this, it is avoided as much as possible that the vibration transmission plate13adetects the vibration of the vibration transmission plate13b. As a result, it is possible to detect which batter surface is struck by the player as accurately as possible and thereby prevent erroneous sound output and erroneous motion of a response object.

Also, in accordance with the present embodiment, the game can be enjoyed only by connecting the music game console1to the television monitor90. Furthermore, since the television monitor90is widely distributed, most people can enjoy a game only by purchasing the music game console1.

Still further, in accordance with the present embodiment, the television monitor90and the music game console1are separately provided. Accordingly, the music game console1can be manufactured without an image display unit such that it can be distributed at a low price.

Incidentally, the present invention is not limited to the above embodiments, and a variety of variations and modifications may be effected without departing from the spirit and scope thereof, as described in the following exemplary modifications.

(1) In the above description, the two piezoelectric elements17aand17bare used to detect strikes on the two batter surfaces2and4. However, the number of piezoelectric elements and the number of batter surfaces are not limited thereto. the number of piezoelectric elements and/or the number of batter surfaces may be one, three or more. In this case, response objects are preferably displayed in the same number as piezoelectric elements. Likewise, the motion lanes of the indication objects are preferably provided also in the same number as piezoelectric elements.

(2) In the above description, while the two response objects170L and170R are displayed, there are the two motion lanes “a” and “b” corresponding to these objects. The numbers of these elements are not limited to two, but may be one, three or more. However, it is not required that the number of the response objects is equal to the number of the piezoelectric elements for detecting strikes.

(3) In the above description, the two piezoelectric elements17aand17bare disposed in the single housing. However, the piezoelectric elements17aand17bmay be disposed in separate housings respectively. In other words, the batter surfaces can be formed with the separate housings.

(4) With the strike sound indicating information of FIG.20, it is possible to designate various tone qualities such as the tone quality of a string instrument, the tone quality of a keyboard instrument, the tone quality of a wind instrument, voices, a noisy sound, an animal cry and any other natural sounds.

(5) In the above description, the strength of striking as indicated by an indication object is one of two levels, i.e., strong and weak levels. However, it is not limited to this. Three of more levels may be used.

(6) The note number as used for the first musical score data305is preferably not used for the second musical score data306or the third musical score data307. Also, the instrument designation information as used for the first musical score data305is preferably not used for the second musical score data306or the third musical score data307.

(7) In one exemplary style of playing a game, a single player enjoys the game by striking the strike surface9with the sticks96in both hands. In another exemplary style of playing a game, two players have the sticks96in both hands respectively such that, while one player strikes the left batter surface2, the other player strikes the right batter surface4to enjoy the game together.

(8) In an alternative game screen, for example, there are displayed two windows in the single screen91, i.e., one window (e.g., corresponding to the screen as illustrated inFIG. 8but reduced by half in size) in which the computer (the high speed processor50) plays the game and the other window (e.g., corresponding to the screen as illustrated inFIG. 8but reduced by half in size) in which the player plays the game, such that the player meets the computer in the context of the game.

(9) In the above description, the strike sound is set by the use of the third musical score data307. However, it is possible to set the tone qualities of strike sounds directly by time, for example, so that one tone quality is used from the start of music for a predetermined time period, and thereafter another tone quality is used for a further predetermined time. Also, the same tone quality may be used for the strike sound until the music ends while the sound volume is fixed throughout the music.

(10) In the above description, the music game console1is not provided with an image display unit. However, an image display unit may be integrally provided with the music game console1. In this configuration, the music game console can be provided as a mobile game machine. Such an image display unit may be a liquid crystal display.

(11) While any appropriate processor can be used as the high speed processor50ofFIG. 6, it is preferred to use the high speed processor in relation to which the applicant has been filed patent applications. The details of this high speed processor are disclosed, for example, in Japanese unexamined patent publication No. 10-307790 and U.S. Pat. No. 6,070,205 corresponding thereto.

(12) In the above description, when an effective strike is performed, the response object is moved in response to this. However, the response object may be changed in shape, color or the like property rather than moved in response to an effective strike. Alternatively, the reaction responsive to an effective strike may be indicated by showing the response object while the response object is usually hidden from the view. The player can be notified of the effective strike also by this reaction.

(13) In the above description, when hit, the indication object is returned back in response to this. However, when hit, the indication object may be changed in shape, color or the like property or disappear rather than returned back. The player can be notified of the hit also by this reaction.

(14) In the above description, the note number of the third musical score data307is not the information which designates a pitch (the frequency of sound vibration) but the information indicating a strike sound. However, this note number is used to designate a pitch. Namely, the pitch of strike sound can be changed by registering anew entry of the third musical score data307. In this case, by including the strike sound indicating information in the instrument designation information, it is possible to control both the tone quality and pitch of the strike sound to realize changeful automatic performance.

(15) In the above description, by making use of the television monitor90, the music game console1can be manufactured without an image display unit such that it can be distributed at a low price. It is possible to furthermore lower the price by design the music game console1connectable to a personal computer. In this case, the signal processing elements other than the right strike detection circuit52and the left strike detection circuit54can be dispensed with. However, an appropriate interface is provided for connecting the music game console1to a USE or MIDI port of the personal computer. The signal processes other than those performed by the right strike detection circuit52and the left strike detection circuit54are performed by software in the personal computer. In this case, it is possible to make the music game console more attractive by adding to this software the functionality of converting a Standard MIDI file, which can be easily got from the Internet and the like or prepared as user's own data, into the second musical score data. This conversion feature may be implemented by simply relating the downbeat and the upbeat of a musical measure to the indications of strong and weak striking. Alternatively, the indications of strong and weak striking can be entered in a MIDI editing screen of the software. The most simple implementation is the omission of indications of the way of striking to use a Standard MIDI file as it is. In this case, it may be said that the player plays a musical instrument rather than enjoys a game.

The foregoing description of the embodiments has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form described, and obviously many modifications and variations are possible in light of the above teaching. The embodiment was chosen in order to explain most clearly the principles of the invention and its practical application thereby to enable others in the art to utilize most effectively the invention in various embodiments and with various modifications as are suited to the particular use contemplated.