JP3324881B2 - Automatic performance device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic performance apparatus for performing an automatic performance while appropriately changing a performance pattern.

[0002]

2. Description of the Related Art Conventionally, automatic performance data (hereinafter referred to as "pattern data") for several measures (about 2 to 16 measures) stored in advance in a storage means is repeatedly read out and given to a sound source to thereby provide a predetermined sound. There is known an automatic performance device for reproducing a performance pattern.

As one of such automatic performance devices, for example, a key is detected based on key depression data obtained from a key depression operation or a MIDI message, and an automatic performance is performed while changing a performance pattern in accordance with a result of the code detection. A device (a first automatic performance device) or a device (a second automatic performance device) that newly adds and reproduces a specific part during an automatic performance has been considered.

[0004] In the first automatic performance device, at the timing when a chord is detected, the chord component sound reproduced before the chord detection (hereinafter referred to as "old chord component sound").
It is necessary to switch to the reproduction of a chord constituent sound (hereinafter, referred to as “new chord constituent sound”) according to the chord detection.
In this case, the sound included in the old chord sound but not included in the new chord sound, the sound not included in the old chord sound but included in the new chord sound, and There are three types of sounds included in both the old chord constituent sounds and the new chord constituent sounds.

[0005] In the first conventional automatic performance device, in the above case, the sound included in the old chord constituent sound but not included in the new chord constituent sound is silenced. A new sound that is not included in the old chord constituent sound but newly included in the new chord constituent sound is newly pronounced,
In the above case, the same sound is retriggered (reproduced) at the timing when the chord is detected.
In particular, in the above case, since the retrigger process is performed to maintain the sound of the same sound, there is a problem that the load on the processing device that controls the automatic performance device is increased and the processing efficiency is deteriorated. Was.

When a chord is detected, the performance pattern currently being played is changed to a new performance pattern, and sound generation is immediately started with the chord constituent sound of the new performance pattern. In this case, the remaining key-on time (remaining gate time) of some chord constituent sounds is shortened depending on the timing of chord detection (timing when the player changes chords), and the attack envelope is maximum depending on the tone. A phenomenon occurs in which the sound is muted before reaching the value. Such a phenomenon occurs in the second automatic performance apparatus even when a part switch is pressed in order to newly add reproduction of a specific part, depending on the timing of the pressing. When such a phenomenon occurs, depending on the timbre, a situation occurs in which the sound is produced only halfway through the attack, and there is a problem that the musicality is impaired.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a first object of the present invention is to reduce the load on a processing apparatus due to a change in a performance pattern and reduce the processing efficiency. It is an object of the present invention to provide an automatic performance device capable of enhancing the performance.

It is a second object of the present invention to provide an automatic performance apparatus which does not lose its musicality even if the performance pattern is changed.

[0009]

According to a first aspect of the present invention, there is provided an automatic performance apparatus for performing an automatic performance by outputting tone data including at least a key code. In the apparatus, a first storage means for storing pattern data of a plurality of parts, and new musical tone data corresponding to a sound to be newly generated according to the pattern data read from the first storage means. Creating means, a second storage means for storing current musical sound data corresponding to a sound currently being generated, a key code included in the current musical sound data stored in the second storing means, Control means for suppressing output of the new musical tone data if the key code included in the new musical tone data created by the creating means is the same.

[0010] Further, for the same purpose, the invention according to claim 2 is characterized in that the control means in the invention according to claim 1 comprises:
If the key code included in the current musical tone data stored in the second storage means is the same as the key code included in the new musical tone data created by the creating means, further based on the current musical tone data It is configured to check whether the timbre of the sound to be pronounced and the timbre of the sound to be pronounced based on the new musical tone data are the same, and to suppress the output of the new musical tone data if they are identical. I do.

In order to achieve the second object,
According to a third aspect of the present invention, there is provided an automatic performance device for performing an automatic performance by outputting musical tone data including at least a key code and a gate time, wherein first pattern data for a plurality of parts is stored. Means for generating new musical tone data corresponding to a sound to be newly generated according to the pattern data read from the first storage means; A second storing means for storing the new musical tone data having a key code different from a key code included in the current musical tone data stored in the second storing means, Control means for correcting and outputting the remaining gate time of the new musical tone data so as to be longer than the predetermined time if the remaining gate time is shorter than the predetermined time.

For the same purpose, the invention according to claim 4 further comprises an instruction means for instructing sounding of a specific part in the invention according to claim 3, and the creating means includes an instruction of the instruction means. And generating new musical tone data according to

For the same purpose, the invention according to claim 5 further comprises a code detection means for detecting a code based on the key press data given in the invention according to claim 3, and the creation means comprises: And generating new tone data based on a performance pattern selected in accordance with the chord detected by the chord detection means.

[0014]

According to the first aspect of the present invention, an automatic performance for performing an automatic performance by outputting, for example, musical tone data including data such as a key code, a gate time, and a velocity to an internal sound source or an external sound source. In the performance device, new tone data corresponding to a sound to be newly generated is created according to the pattern data read from the first storage means, and the created new tone data is stored in the second storage means. Is compared with the current musical tone data indicating the currently sounding sound, and if the key code included in the current musical tone data is the same as the key code included in the new musical tone data, the output of the new musical tone data is suppressed. Like that.

That is, the retrigger based on the new musical tone data is not performed, and the pronunciation based on the current musical tone data that is already being produced is continued. Therefore, the load on the processing device due to the change of the performance pattern is reduced, and the processing efficiency can be improved.

According to a second aspect of the present invention, in the first aspect of the present invention, if the key code included in the current musical tone data and the key code included in the new musical tone data are the same, the current musical tone data is further modified. It is checked whether the tone color of the sound to be generated based on the musical tone data is the same as the tone color of the sound to be generated based on the new musical tone data, and if the tone colors are the same, the output of the new musical tone data is suppressed. .

Thus, even in an automatic performance apparatus in which the timbre differs depending on the performance pattern, for example, if the two key codes are the same and the timbres are the same, new tone data is not output. Therefore, the retrigger based on the new musical tone data is not performed, and the pronunciation based on the current musical tone data that is already being produced is continued. Therefore, also in this case, the load on the processing device due to the change of the performance pattern is reduced, and the processing efficiency can be improved.

According to the third aspect of the present invention, an automatic performance for performing an automatic performance by outputting musical tone data including data such as a key code, a gate time, and a velocity to, for example, an internal sound source or an external sound source. In the performance device, new tone data corresponding to a sound to be newly generated is created according to the pattern data read from the first storage means, and the created new tone data is stored in the second storage means. Is compared with the current tone data indicating the sound currently being played, and if new tone data having a key code different from the key code included in the current tone data is created, the remaining gate time of the new tone data is generated. Is smaller than or equal to a predetermined time, the output is corrected so as to be equal to or longer than the predetermined time.

Thus, for example, when the performance pattern is changed, even if the remaining gate time is short, even if the sound is generated, there is no sound which is not muted without reaching the maximum value of the attack envelope. Pronunciation is complete. Therefore, the musicality is not impaired even if the performance pattern is changed.

According to the fourth aspect of the present invention, automatic performance is performed by outputting musical tone data including data such as a key code, a gate time, and a velocity to, for example, an internal sound source or an external sound source. In the performance device, when the pronunciation of a specific part is instructed,
The pattern data corresponding to the part is read from the first storage means to create new tone data corresponding to a sound to be newly generated, and the created new tone data and the second tone data are stored in the second storage means. The current musical tone data indicating the sound currently being generated is compared with the current musical tone data. If new musical tone data having a key code different from the key code included in the current musical tone data is created, the remaining gate time of the new musical tone data is set to a predetermined time. If it is less than the predetermined time, the output is corrected so as to be longer than the predetermined time.

Thus, even if the performance pattern is changed at an arbitrary timing by, for example, instructing the reproduction start of a specific part by a part switch or the like, even if the remaining gate time is short and the sound is generated, the attack is not affected. There is no sound that would cause the envelope to be silenced without reaching the maximum value, and at least the attack sound would be completely generated.
Therefore, the musicality is not impaired even if the performance pattern is changed.

According to the fifth aspect of the present invention, an automatic performance for performing an automatic performance by outputting musical tone data including data such as a key code, a gate time, a velocity and the like to, for example, an internal sound source or an external sound source. In the performance device, for example, when a chord is detected based on key press data of a keyboard device or key press data generated by receiving MIDI data, when a performance pattern is changed in accordance with the detected code, the performance is changed. The pattern data corresponding to the pattern is read out from the first storage means to create new tone data corresponding to the sound to be newly generated, and the created new tone data and the current tone data stored in the second storage means are stored. The new musical tone data having a key code different from the key code included in the current musical tone data is compared with the current musical tone data indicating the sound being pronounced. When made, the remaining gate time of the new musical sound data is to be output to correct so that above said predetermined time equal to or less than a predetermined time.

Thus, even if the performance pattern is changed at an arbitrary timing due to, for example, a chord being detected in response to key depression or reception of MIDI data,
Even if the remaining gate time is short and the sound is pronounced, the attack envelope does not reach the maximum value and there is no sound that is muted, and at least the attack sound is completely sounded. Therefore, the musicality is not impaired even if the performance pattern is changed.

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an automatic musical instrument according to an embodiment of the present invention.

FIG. 1 is a block diagram showing the configuration of an embodiment of an automatic performance apparatus according to the present invention. This automatic performance apparatus includes a central processing unit (hereinafter, referred to as “CPU”) 10, a read-only memory (hereinafter, referred to as “ROM”) 11, a random access memory (hereinafter, referred to as “RAM”) 12,
Operation panel 13, tone generator 14, timer 16, MID
The I controller 17 and the FD controller 18 are connected to each other via a system bus 30.
The system bus 30 includes, for example, an address line, a data line, a control signal line, and the like, and is used for transmitting and receiving various data between the above-described components.

The CPU 10 corresponds to a creation unit, a control unit, and a code detection unit.
This is realized by the processing of No. 10. This CPU 10
According to the control program stored in the ROM 11,
It controls the entire automatic performance device. The CPU 10 is provided with two interrupt signal input terminals INT1 and INT2. MIDI is provided at the interrupt signal input terminal INT1.
An interrupt signal is supplied from the timer 17 to the interrupt signal input terminal INT2 from the controller 17. This C
Details of the operation of the PU 10 will be described later.

The ROM 11 stores a control program for operating the above-described CPU 10 and a C program.
Various fixed data used by the PU 10 for various processes are stored. The contents of the ROM 11 are read by the CPU 10. That is, the CPU 10 reads out a control program (command) from the ROM 11, interprets and executes the control program, and reads out predetermined fixed data and uses it for various processes.

The RAM 12 corresponds to the first storage means. The RAM 12 temporarily stores various data used by the CPU 10. Various areas such as buffers, registers, counters, and flags are defined in the RAM 12. A specific buffer used in this embodiment,
Registers, counters, flags, and the like will be described each time they appear, but here, the "reception buffer", "register group n", and "measure register and beat register" will be described.

Receive Buffer The receive buffer is used to temporarily store MIDI data received from a MIDI controller 17 described later. As shown in FIG. 13, for example, the reception buffer includes a counter CTR, a pointer PTR, and a storage area defined in the RAM 12, and functions as a FIFO (first-in first-out) memory under the control of the CPU 10. Has become. The storage area has, for example, 256 entries, and MIDI data is sequentially stored in each entry.

The counter CTR specifies the position of the storage area where the received MIDI data is to be written. The counter CTR is controlled so as to always point to the next address of the MIDI data written last. The initial value of the counter CTR is "0", and is incremented each time MIDI data is written. When the result exceeds the maximum value TOP, the counter circulates to the minimum value BTM.

The pointer PTR indicates the position of the MIDI data to be read in the storage area. The pointer PTR is controlled so as to always point to the next address of the MIDI data read last, that is, the address of the MIDI data to be read next. This pointer P
The initial value of TR is “0”, and is incremented each time MIDI data is read, and the result is set to the maximum value TO.
If it exceeds P, it circulates to the minimum value BTM.

When the content of the counter CTR matches the content of the pointer PTR, the receiving buffer is determined to be empty. As a result of incrementing the counter CTR, the contents of the counter CTR are
If the contents match the contents of the TR, the reception buffer is full, so that the reception of MIDI data is controlled to be suppressed. If the contents of the counter CTR and the contents of the pointer PTR do not match, it is determined that MIDI data exists in the reception buffer.

The writing of MIDI data to the receiving buffer is performed by a MIDI-IN interrupt processing routine described later, and the reading of MIDI data from the receiving buffer is performed by a MIDI-IN processing routine described later. In this embodiment, a reception buffer is formed in the RAM 12, and control of writing / reading of MIDI data is performed by a CPU.
Although the configuration is performed in step 10, the configuration may be made using a well-known FIFO memory element instead of these.

Register Group n The register group n corresponds to the second storage means.
Register group n (n corresponds to the part number, n = 1
~ 4. ) Is used to manage pronunciation for each part. Assuming that the number of polyphonics of each part in the present embodiment is “8”, this register group n is, for example, as shown in FIG.
As shown in FIG. 4 (A), it is composed of eight blocks. Each block corresponds to one sound, and is composed of three bytes of "key code and its on / off", "corrected velocity", and "remaining gate time" as musical sound data.

The key code (7 bits) is used to indicate a pitch. The on / off bit (1 bit) is used to indicate whether the sound indicated by the key code is in a key-on state or a key-off state. The corrected velocity (7 bits) is data obtained by correcting the velocity in the pattern data according to the velocity correction data. The remaining gate time (7 bits) is used to indicate the remaining sounding time of the sound being sounded (the sound whose on / off bit is "1"). FIG. 14A shows only a register group for one part, but actually, a register group having the same configuration is provided for each of parts 1 to 4.

Measure Register and Beat Register The measure register BRR is a register for counting the progress of measures. This measure register BRR can perform counting corresponding to four decimal digits. The beat register BTR is a register for counting the progress of a beat in a bar. The beat register BTR is counted up for each step time. In this embodiment, one beat has a resolution of 48 steps. Therefore, the beat register BTR rounds to zero after counting four beats in the case of four beats, that is, 192 steps. At this time, the bar register BRR is controlled so as to be incremented. The bar register BRR and the beat register BTR are used to read out step time correction data and velocity correction data for generating fluctuation (the details will be described later).

This RAM 12 stores the above-described buffers, registers, etc., and stores pattern data and fluctuation data. The fluctuation data is composed of step time correction data and velocity correction data. Hereinafter, each of these data will be described.

Pattern Data Pattern data is used to generate a performance pattern of, for example, about 2 to 16 measures. The pattern data is composed of a set of 4-byte data such as a step time, a note number (key code), a gate time, and a velocity, as shown in FIG. Each pattern data corresponds to one musical note. Here, the step time designates the time at which the sound starts, and is defined by the number of steps from the beginning of the bar. The note number is used to define the pitch. The gate time is used to define the sounding time. Velocity is used to define the sound intensity (volume).

Step Time Correction Data As shown in FIG. 15, for example, part of the step time correction data is prepared for each bar of each of the parts 1-4. In this embodiment, one beat (a quarter note) is controlled with a resolution of 48 steps. Therefore, the step time correction data is defined so that the step time of each beat can be varied within a range of ± 24 steps as shown in an enlarged manner in FIG. This makes it possible to delay or advance the sounding timing up to a maximum length of an eighth note. However, in the case of correcting to the negative side, the step time correction data is obtained by adding “−1 step” to the immediately preceding data due to the processing in the part 1 to 4 reading processing routine (FIGS. 9 and 10) described later. "It is created to change by minutes.

The step time correction data is prepared for each area by dividing one bar into four areas (in quarter note units). Therefore, when there are a plurality of key events in one area, the same step time correction data is used. With such a data configuration, the amount of the step time correction data can be reduced.

Velocity Correction Data As shown in FIG. 16, for example, the velocity correction data is prepared for each bar of each of the parts 1 to 4 for one bar. In this embodiment, the correction rate VAn for each beat (a quarter note) is stored as correction data. That is, the velocity correction data is defined so as to be able to vary within a range of “0.0 to 2.0” for each beat, as shown in an enlarged manner in FIG. Therefore, the velocity can be corrected in a range from 0 to 2 times around 1 time.

The velocity correction data is also prepared for each area by dividing one bar into four areas (in quarter note units), similarly to the step time correction data. Therefore, when there are a plurality of key events in one area, the same velocity correction data is used. With such a data configuration, the amount of velocity correction data can be reduced.

Returning to the description of FIG. On the operation panel 13,
Various switches, indicators, and the like are provided for communication between the automatic performance device and the operator. Details of the operation panel 13 will be described later.

The tone generator 14 generates a tone signal based on data sent from the CPU 10 via the system bus 30. The tone signal generated by the tone generator 14 is sent to the speaker system 16.
The speaker system 16 includes, for example, an amplifier, a speaker, and the like, and is a well-known type that converts a tone signal transmitted from the tone generator 14 into an acoustic signal and emits the sound.

The timer 16 generates an interrupt signal at intervals corresponding to the tempo. The interrupt signal generation interval is determined by the CPU
10 is determined by data set in the timer 16. The interrupt signal generated by this timer 16 is
0 is supplied to the interrupt signal input terminal INT2. In this embodiment, quarter notes are controlled with a resolution (accuracy) of 1/48. Therefore, 48 interrupt signals are generated per quarter note.

The MIDI controller 17 controls the transfer of MIDI data between the external device and the automatic performance device. Examples of the external device connected to the outside of the MIDI controller 17 include an electronic musical instrument, a sound source module, a computer, a sequencer, and the like, which can process MIDI data. The MIDI controller 17 receives MIDI data serially transmitted from an external device, and generates an interrupt signal when the MIDI data becomes, for example, 1 byte. This interrupt signal is CP
It is supplied to an interrupt signal input terminal INT1 of U10.

The FD controller 18 controls the floppy disk drive 19. The floppy disk mounted on the floppy disk drive 19 stores, for example, pattern data, fluctuation data, and the like. By operating a predetermined switch (not shown) provided on the operation panel, the pattern data and the fluctuation data recorded on the floppy disk are transferred to the RAM 12 via the FD controller 18.
Is loaded into a predetermined area.

FIG. 2 is a diagram showing an example of the configuration of the operation panel 13 of the automatic performance apparatus. The bar / beat indicator 130 is constituted by, for example, a 5-digit 7-segment LED indicator.
The upper four digits of the bar / beat indicator 130 indicate the "measure" currently being played automatically, that is, the contents of the bar register BRR, and the lower one digit is the "beat" currently being played automatically, that is, A beat corresponding to the content of the beat register BTR (specifically, in the case of quadruple, a value obtained by adding 1 to a quotient obtained by dividing the content of the beat register BTR by 48) is displayed. The display contents of the bar / beat display are sequentially updated as the automatic performance progresses.

The code display 131 comprises, for example, an LCD display. The code display 131 displays codes (code routes and code types) detected in a code detection process described later. In this embodiment, M
It is assumed that MIDI data transmitted by the IDI channel 1 (MIDI-CH1) is regarded as data from the lower key, and code detection is performed on the MIDI data. Therefore, the code detected on the basis of the MIDI data transmitted from the MIDI channel 1 is displayed on the code display 131. The code detection is performed by MIDI
The performance data is not limited to the performance data transmitted from channel 1, but may be any other MIDI channel or a plurality of MIDI channels.
The performance data transmitted from the DI channel may be configured as a target.

The tempo speed indicator 132 is, for example, 3
It consists of a digit 7-segment LED display. The tempo speed indicator 132 displays the currently set tempo speed.

Although the bar / beat display 130 and the tempo speed display 132 are composed of a 7-segment LED display, they can be composed of an LCD display, a CRT display and other various displays. . Similarly, the code display 131 is not limited to the LCD display, but may be a CRT display or other various displays.

The incrementer 133 is used for setting a tempo. The incrementer 133 is controlled such that, for example, the right-handed rotation increases the tempo, and the left-handed rotation decreases the tempo. The tempo set by the incrementer 133 is displayed on the tempo speed display 132.

The stop switch 134 is used to stop automatic performance. That is, if the stop switch 134 is pressed during the automatic performance, the automatic performance is stopped.
The play / pause switch 135 is used to start or pause automatic performance. When the play / pause switch 135 is pressed while the automatic performance is stopped or in a pause (pause) state, the LED display 1
43 is turned on to start or restart the automatic performance, and when pressed during automatic performance, the LED display 143 is turned off and the apparatus enters a pause state.

The FF switch 136 is used for reproducing at a higher tempo speed. That is, when the FF switch 136 is pressed during the automatic performance state, the LED display 144 is turned on to perform high-speed reproduction, and when pressed again, the LED display 144 is turned off and returns to the original tempo speed. The REW switch 137 is used to return the playback position. That is, when the REW switch 137 is pressed, the LED display 145 is turned on, and the measure / beat count is reduced (rewind). This rewind state can be confirmed on the bar / beat indicator 130. When the REW switch 137 is pressed again in the rewind state, the LED display 145 is turned off and the reproduction of the automatic performance is restarted.

The repeat switch 138 is used to automatically and repeatedly play a music piece. That is, if the repeat switch 138 is pressed before the automatic performance is started, the LED display 146 is turned on. When the automatic performance is performed to the end of the music, the automatic performance of the same music is repeated by returning to the beginning. When the repeat switch 138 is pressed again in this state, the LED display 146 is turned off, and the repeated reproduction state of the automatic performance is released. The repeat switch 138 is also used to repeatedly reproduce a specific section of the music by performing a predetermined operation in an automatic performance state, but the description thereof is omitted here.

The part switches 139 to 142 correspond to the instruction means. The part 1 switch 139 is used to instruct the rhythm part to sound. When this part 1 switch 139 is pressed, the LED display 147 is displayed.
Is turned on to sound the rhythm part, and when pressed next time, the LED display 147 is turned off and the sound of the rhythm part is stopped. Similarly, the part 2 switch 140 is used to instruct the sounding of the bass part. When this part 2 switch 140 is pressed, the LED display 148 is turned on and the base part is sounded.
The ED display 148 is turned off, and the sound of the bass part is stopped.

Similarly, the part 3 switch 141 is used to instruct the sounding of the accompaniment part (for example, a chord part). This part 3 switch 14
When the button 1 is pressed, the LED display 149 is turned on to emit the sound of the accompaniment part. When the button 1 is pressed next time, the LED display 149 is turned off and the sound of the accompaniment part is stopped. Similarly, the part 4 switch 142 is used to indicate a melody part. When this part 4 switch 142 is pressed, the LED display 150 is turned on and the melody part is sounded.
The ED display 150 is turned off and the sound of the melody part is stopped.

Among the above parts, the rhythm part, the bass part, and the accompaniment part are generated by repeatedly executing pattern data of about one to several measures, and are mechanically given by fluctuating these parts. Simple monotony is eliminated. The melody part is
All pattern data for one music is stored.

In addition to the above, the operation panel 13 has a tone selection operator for selecting a desired tone from a plurality of tones, a volume operator for adjusting the volume, and an operation for loading data from the floppy disk into the RAM 12. Although these elements are provided, they are not directly related to the present invention, and thus illustration and description are omitted.

The setting states of the switches and the like on the operation panel 13 configured as described above are read into the CPU 10 as follows. That is, the CPU 10 sends a scan command to the operation panel 13. The operation panel 13 sends a signal indicating on / off of each operation switch and a signal indicating the current value of the incrementer 133 to the CPU 10 in response to the scan command. The CPU 10 generates panel data (consisting of switch data in which ON / OFF of each switch corresponds to one bit and incrementer data indicating a set value of the incrementer 133) from the received signal. This panel data is stored in a RAM under the control of the CPU 10.
12 is used to determine the presence or absence of a panel event (details will be described later).

Next, the operation of the automatic performance device of the present invention will be described in detail with reference to the flowcharts shown in FIGS.

(1) Main Processing (FIG. 3) FIG. 3 is a flowchart showing a main routine of the automatic performance apparatus of the present invention, which is started when the power is turned on. When the power is turned on, first, an initialization process is performed (step S10). In this initialization process, the internal state of the CPU 10 is set to the initial state, and an initial value is set to a register, a counter, a flag, or the like defined in the RAM 12.

When the initialization process is completed, a panel switch scan process is performed (step S1).
1). That is, the CPU 10 sends a scan command to the operation panel 13. Thereby, the operation panel 13
The panel data is generated as described above,
Send to The CPU 10 stores this panel data (hereinafter, referred to as “new panel data”) in a predetermined area of the RAM 12. Next, panel data read in the previous panel switch scan process and already stored in the RAM 12 (hereinafter referred to as "old panel data") is compared with the new panel data, and a panel having a different bit turned on is compared. Create an event map.

Next, the presence or absence of an event is checked (step S12). This is performed by referring to the panel event map. That is, it is checked whether or not one or more bits are on in the panel event map. If there is no bit, there is no event, and if there is one or more, there is an event. Each is judged. If it is determined in step S12 that there is an event, a panel control process is performed (step S13). Otherwise, the panel control process is skipped. The details of the panel control process will be described later.

Next, the reception data (MI
DI data) is checked (step S).
14). This is performed by checking whether or not the contents of the counter CTR and the contents of the pointer PTR match as described above. Here, if it is determined that there is received data in the receiving buffer, a MIDI-IN process is performed (step S15);
Processing is skipped. Details of the MIDI-IN processing will be described later.

Next, the reading process of parts 1 to 4 is executed (step S16). This process is a process of reading the pattern data of each part and reproducing a musical tone. The details of the part 1-4 reading process will be described later.

Next, "other processing" is performed (step S17). In this "other processing", control of the floppy disk, tone color selection processing, volume setting processing, and the like are performed, but the description is omitted because it is not directly related to the present invention. Thereafter, the process returns to step S11, and the same processing is repeated thereafter.

(2) MIDI-IN Interruption Processing (FIG. 4) This MIDI-IN interruption processing is executed by interrupting the processing of the main routine. In this MIDI-IN interrupt processing, the MIDI
Data is stored in the reception buffer. The MIDI controller 17 receives the MIDI serially transmitted from the external device.
When the DI data reaches one byte, an interrupt signal is generated.
This interrupt signal is input to the interrupt signal input terminal INT1 of the CPU 10.
Supplied to As a result, the CPU 10 enters the interrupt mode, and the MIDI-IN interrupt processing routine is called.

In the MIDI-IN interrupt processing, first,
The MIDI data is read from the DI controller 17 and written to a position of the reception buffer indicated by the counter CTR (step S20). Next, the counter CTR is incremented (step S21), and it is checked whether the result has exceeded the maximum value TOP of the storage area (step S22). And the maximum value TOP
MIDI-IN
The processing routine returns to the interrupted position of the main routine. On the other hand, if it is determined in step S22 that the value exceeds the maximum value TOP, the content of the counter CTR is rewritten to the minimum value BTM (step S23), and thereafter, the MIDI-IN processing routine interrupts the main routine. Return to position. As a result, a function of a circular buffer for rounding from the maximum value TOP to the minimum value BTM is realized.

Although not shown in the figure, if the result of incrementing the counter CTR exceeds the value of the pointer PTR, the reception buffer is full, and the MIDI data fetch process is suppressed. .

(3) Panel Control Process (FIG. 5) Next, details of the panel control process performed in step S13 of the main routine will be described with reference to the flowchart of FIG.

This panel control processing routine is called when it is determined in the main routine that an event such as a panel switch has occurred. In the panel control process, first, it is checked whether or not there is an event of the incrementer 133 (step S30). That is, the incrementer data in both the new and old panel data is compared, and if they differ, it is determined that the event of the incrementer 133 has occurred. If it is determined in step S30 that there has been an event of the incrementer 133, tempo speed processing is performed (step S31). Otherwise, the tempo speed processing is skipped. In the tempo speed process, the incrementer data in the new panel data is set in the timer 16 and sent to the tempo speed indicator 132. Thereby, the interval of the interrupt signal generated from the timer 16 is changed, and the tempo speed of the automatic performance is changed. The changed tempo speed is displayed on the tempo speed indicator 132.

Next, it is checked whether or not there is an event of the stop switch 134 (step S32). This is the stop switch 13 in the panel event map.
This is performed by checking whether the bit corresponding to 4 is “1”. Here, if it is determined that there is an event of the stop switch 134, a stop process is performed (step S33), otherwise, the stop process is skipped. In the stop processing, the automatic performance flag defined in the RAM 12 is cleared to “0”. As a result, in the timer interrupt processing (FIG. 12) described later, the updating of the bar register BRR and the beat register BTR is suppressed, the progress of the automatic performance is stopped, and the sound emission of each part is stopped.

Next, it is checked whether or not there is an event of the play / pause switch 135 (step S3).
4). This is performed by checking whether or not the bit corresponding to the play / pause switch 135 in the panel event map is “1”. Here, if it is determined that there is an event of the play / pause switch 135, a play process is performed (step S35), otherwise, the play process is skipped. In the play processing, when it is determined that the automatic performance flag is "0", that is, the play / pause switch 135 is pressed while the automatic performance is stopped, the automatic performance flag is set to "1" and the LE is set.
The D display 143 is turned on. As a result, in the timer interrupt processing (FIG. 12) described later, updating of the bar register BRR and the beat register BTR is started, and the automatic performance proceeds. Conversely, if it is determined that the automatic performance flag is "1", that is, the play / pause switch 135 is pressed during the automatic performance, the automatic performance flag is cleared to "0" and the LED display 143 is turned off. Is done. This allows
The same processing as when the stop switch 134 is pressed is performed, and the sound emission of each part is stopped.

Next, it is checked whether or not there is an event of the FF switch 136 (step S36). This is performed by checking whether the bit corresponding to the FF switch 136 in the panel event map is “1”. Here, if it is determined that there is an event of the FF switch 136, FF processing is performed (step S3).
7), otherwise the FF processing is skipped. FF
In the processing, when it is determined that the FF flag defined in the RAM 12 is “0”, that is, when the FF switch 136 is pressed during the normal reproduction, the FF flag is set to “1”, and the predetermined data is stored in the timer 16. While being set,
The LED indicator 144 is turned on. As a result, the tempo speed is increased and high-speed reproduction is performed. Conversely, FF
The flag is “1”, that is, the FF switch 13
When it is determined that 6 has been pressed, the FF flag is cleared to "0", the original data is restored to the timer 16, and the LED display 144 is turned off. This returns to the tempo speed before the FF switch 136 was pressed.

Next, it is checked whether there is an event of the REW switch 137 (step S38). This is performed by checking whether the bit corresponding to the REW switch 137 in the panel event map is “1”. Here, if it is determined that there is an event of the REW switch 137, the REW process is performed (step S39), and if not, the REW process is skipped. In the REW process, the REW flag defined in the RAM 12 is set to “0”,
When it is determined that 7 has been pressed, the REW flag is set to "1".
And the bar register B defined in the RAM 12
The RR and beat register BTR are decremented at a predetermined rate, the result is sent to the bar / beat indicator 130, and the LED indicator 145 is turned on. Thereby, the display of the bar / beat indicator 130 is decremented, and the sequence of the automatic performance is retreated. Note that the sound generation is stopped during the REW processing. Conversely, if the FF flag is “1”,
That is, when it is determined that the REW switch 137 has been pressed during high-speed playback, the REW flag is cleared to “0”, and
The LED display 145 is turned off. As a result, the automatic performance is restarted from the reduced bar register BRR and beat register BTR.

Next, it is checked whether or not there is an event of the repeat switch 138 (step S40). This is the repeat switch 13 in the panel event map.
This is performed by checking whether the bit corresponding to 8 is “1”. Here, if it is determined that there is an event of the repeat switch 138, a repeat process is performed (step S41), otherwise, the repeat process is skipped. In the repeat processing, if the repeat flag defined in the RAM 12 is “0”, the repeat flag is set to “1” and the LED display 146 is turned on. Conversely, if the repeat flag is “1”, the repeat flag is cleared to “0” and the LED display 145
Is turned off. Thereby, although the details are not shown, when the reading of the pattern data for one music is completed, if the repeat flag is "1", the sequence of the automatic performance returns to the beginning of the music, and the same automatic performance is repeated. Be executed. On the other hand, if the repeat flag is "0", the automatic performance is stopped.

Next, it is checked whether there is an event of the part switches 139 to 142 (step S4).
2). This is performed by checking whether the bit corresponding to the part switches 139 to 142 in the panel event map is “1”. Here, when it is determined that there is an event of the part switches 139 to 142, the part 1 to 4 switching processing is performed (step S43), otherwise, the part 1 to 4 switching processing is skipped.
Thereafter, the control returns from the panel control processing routine and returns to the main routine. The details of the part 1-4 switching process will be described later.

(4) MIDI-IN processing (FIGS. 6 and 7) This MIDI-IN processing routine is called from the main routine at regular intervals. In the MIDI-IN process, first, one MIDI message is extracted from the reception buffer, and it is checked whether or not the MIDI channel number included in the MIDI message is "1", that is, the data of the lower key (step S50). This is performed by checking the channel number in the lower 4 bits of the first byte of the MIDI message. Here, if it is determined that the channel number is not "1", the process branches to step S67, and a tone generation process based on the MIDI data is performed. On the other hand, if it is determined that the channel number is “1”, that is, it is data of the lower key, a key bit map is created (step S51). The key bitmap is data in which the on / off state of all keys is associated with “1” or “0”, respectively.

Next, a code detection process is performed (step S52). That is, a code detection process is performed using the key bitmap created above, and a code type and a code route are detected. This code detection can be performed using various known methods. The code detected here is stored in the new code area of the RAM 12 as a new code. The detected code type and code route are sent to the code display 131 and displayed.

Next, it is checked whether a code change has occurred (step S53). This is performed by comparing the old code detected in the previous code detection process and stored in the old code area of the RAM 12 with the new code. When it is determined that the code has not changed, the process returns from the MIDI-IN processing routine and returns to the main routine. That is, even if a MIDI message that does not change the chord type and chord root is input, the automatic performance state does not change. On the other hand, if it is determined that the code has changed, the process proceeds to step S54.
The processing corresponding to the following code change is performed.

The automatic performance device of this embodiment has a configuration in which, when a chord is changed, not only the chord constituent sound changes but also the performance pattern. For example, the chord of the major and the chord of the minor have different playing patterns. In order to realize a function of changing a performance pattern in accordance with a detected chord, pattern data for each chord type, for example, pattern data of a major chord and pattern data of a minor chord are always read from the RAM 12. Whether to use the pattern data is determined by the detected code type.

FIG. 17 shows an outline of the operation of the tone generation process when the chord changes. FIG. 17 shows a case where the chord changes from C major to C minor at time TA. The portion surrounded by a thick line indicates that the pattern data is to be read, and the hatched portion therein indicates the readout. This indicates that sound is generated based on the performed pattern data.

Before time TA, the sounds (keys 1, 2, 3) constituting the C major are pronounced in the performance pattern of the major, and the sounds constituting the C minor (keys 1, 4, 3)
In the case of 5), only the pattern data is read in the minor performance pattern. Then, when the C minor, which is a new chord, is detected at the time TA, thereafter, the sounds (keys 1, 4, and 5) constituting the C minor are produced in the minor performance pattern. FIG. 17 shows that at time TA, the keys 2 and 3 that have been pressed until then are released,
The keys 4 and 5 are newly pressed, and the key 1 which has been pressed until then is shown as being continuously pressed.

In the fixed time TR immediately after the time TA, the following processing is performed. That is, when a chord change is detected, the sound being generated is immediately stopped (see keys 1 and 2 in FIG. 17). Of the chord constituent sounds after chord change,
Even if the sound ends sounding within a certain time TR after the chord change is detected, the sounding sound generated by the previous chord continues sounding (see key 1 in FIG. 17). A sound which ends sounding within a predetermined time TR after a chord change is detected and which is not sounded by a previous chord is extended to a predetermined time TR and sounded (key 4 in FIG. 17).
reference). If the sound does not end within a predetermined time TR after the chord change is detected, the sound is newly started (see key 5 in FIG. 17).

By performing such processing, a sound which should be sounded in response to a chord change but whose sound is stopped in a short time, such as the key 4 in FIG. Is pronounced. In this way, by extending the pronunciation of sounds that disappear in a short time,
For example, there is no sound in which the attack envelope is muted without reaching the maximum value, and at least the attack sound is completely generated. Therefore, it is possible to avoid occurrence of a situation where the musicality is impaired due to the change of the performance pattern.

Returning to the description of FIG. The above-described function is realized in the processing for the code change in step S54 and subsequent steps. First, the part number is initialized to "n = 2" (step S54). This is the initialization of a part number for performing processing only on parts 2 to 4 because part 1 is a rhythm part and has nothing to do with chord change.

Next, a key code of the new pattern of part n is generated (step S55). That is, step S
A key code of a chord constituent sound (hereinafter, referred to as a “new key code”) is generated from the chord type and the chord root detected at 52. In the example shown in FIG. 17, three new key codes corresponding to keys 1, 4 and 5 are generated. Next, the remaining gate time of the new pattern of part n is generated (step S56). The remaining gate time is calculated from the sounding end time calculated from the step time and the gate time included in the pattern data of the new pattern and the current contents of the beat register BTR.

Next, the correction velocity of the new pattern of part n is generated (step S57). The details of the generation of the corrected velocity are shown in the flowchart of FIG. In the correction velocity generation processing, first, the correction rate VAn is read (step S70). That is, the bar register BRR and the beat register BT
The correction rate VAn is read from the corresponding position in the velocity correction data of the RAM 12 using the content of R as an address. Next, the read correction rate VAn
Is multiplied by the velocity VELO (velocity data in the pattern data) at that time, and the corrected velocity VL
An is generated (step S71).

Next, it is checked whether or not the result of the multiplication is larger than 127 (step S72). If it is larger than 127, 127 is set as the new corrected velocity VLAn (step S73).
Is skipped, and the multiplication result is used as it is as a new corrected velocity VLAn. Thereafter, the routine returns from the corrected velocity generation routine and returns to the MIDI-IN processing routine. By the processing of steps S55 to S57 of the MIDI-IN processing routine described above, the keys corresponding to the chord constituent sounds of the new pattern (in the example shown in FIG. 17, each of the keys 1, 4 and 5). The creation of the code, the remaining gate time and the corrected velocity is completed.

Next, the comparison process of the register group n and the sound generation continuation / mute process are performed (steps S58 and S5).
9). That is, the key code stored in the register group n in the key-on state is compared with the new key code. If a matching key code is found in the register group n, no processing is performed on the key code. Not done. That is, the retrigger based on the new key code is not performed, and the sound generation based on the key code that is already sounding is continued. This is a process corresponding to the case of key 1 in FIG. Therefore,
The load on the CPU 10 due to the change of the performance pattern is reduced, and the processing efficiency can be improved.

On the other hand, in the above comparison, for the key code which is the chord constituent sound before the chord detection but is not the chord constituent sound after the chord detection, the corresponding key code in the register group n is turned on / off. The bit is cleared to "0" and key-off output is performed. Here, “key-off output” means that predetermined data is transmitted to the tone generator 14,
This refers to a series of processing for terminating sound generation by replacing the current envelope with a release envelope that is much faster than the current envelope, and the same applies to the following. This is a process corresponding to the case of the keys 2 and 3 in FIG.

Next, it is checked whether the key code is a newly generated key code (step S60). That is, it is checked whether or not the new key code is a key code that has become a new chord constituent sound after the chord detection, but not a chord constituent sound before the chord detection. If it is determined that the key code is a newly generated key code, the process proceeds to step S63. If not, it is checked whether or not the tone color of the new pattern is the same as the tone color of the performance pattern that has been sounded so far. (Step S61). This can be performed by referring to the start data stored at the beginning of the pattern data corresponding to each performance pattern. When it is determined that the timbres are the same, the process branches to step S67. Therefore, for a new key code that is not a newly generated key code, that is, a key code and timbre that are the same as the sound that was generated before the code was detected, no new pronunciation is started,
The previous sound will continue to be generated as it is. This is a process corresponding to the case of key 1 in FIG.

On the other hand, if it is determined that the timbres are not the same, the timbre is output (step S62). That is, the tone color data included in the start data of the new pattern is output. As a result, subsequent automatic performances using the new pattern will be sounded with the timbre related to the timbre output.
Thereafter, the flow branches to step S63.

In step S63, it is checked whether the remaining gate time corresponding to the new key code is shorter than a predetermined time TR. If it is determined that the time is shorter than the predetermined time TR, the remaining gate time is determined to be the predetermined time TR.
(Step S64). As a result, the sounding time of a sound having a short remaining gate time is extended to the predetermined time TR, and for example, there is no sound in which the attack envelope is silenced without reaching the maximum value. this is,
This is processing corresponding to the case of key 4 in FIG. If it is determined in step S63 that the remaining gate time corresponding to the new key code is not shorter than the predetermined time TR,
Step S64 is skipped. This is shown in FIG.
This is processing corresponding to the case of key 5 of FIG.

Next, a process of storing the data in the register group n is performed (step S65). That is, the newly generated key code with the on / off bit set to "1", the remaining gate time, and the corrected velocity are stored in one block of the register group n. At this time, the block used for storage is a block whose on / off bit is “0”. Next, a key-on output is performed (step S66). Here, "key-on output" refers to a series of processes for transmitting predetermined data (key code, velocity, etc.) to the tone generator 14 and starting sounding, and the same applies to the following. At this time, since the corrected velocity is output as the velocity, a sound corresponding to the key code is generated at the corrected velocity. Then, step S
Proceed to 65.

In step S65, the part number n is incremented, and it is checked whether the result is 5 or more, that is, whether the processing up to part 4 is completed (step S66). If it is determined that the difference is not more than 5, the process returns to step S55, and the same processing as described above is repeated. On the other hand, when it is determined that the number is 5 or more, that is, when it is determined that the processing up to Part 4 is completed, the process returns from the MIDI-IN processing routine and returns to the main routine.

(5) Part 1-4 reading process (FIGS. 9 and 10) The part 1-4 reading process is called periodically from the main routine. In this part 1-4 reading process, first,
The part number is initialized to "n = 1" (step S8)
0). That is, in the part 1 to 4 reading processing, the reading processing of the pattern data corresponding to each of the parts 1 to 4 is performed. Next, the step correction value SAn is read (step S81). That is, measure register B
RA using the contents of RR and the contents of the beat register BTR as an address
The corresponding correction data SAn is read from the step time correction data of M12. Since the step time correction data is stored in quarter note units, the same address as the value displayed on the bar / beat indicator 130 is used as the above address, and a predetermined lower order of the contents of the beat register BTR is used. Bits are ignored.

Next, the correction data SAn is added to the contents of the beat register BTR, and the beat register BTRn for part n is added.
(Step S82). Next, the result of the addition (contents of the part n beat register BTRn) is “0”.
It is checked whether it is smaller (step S83).
If it is determined that the value is smaller than “0”, the part n
"192" is added to the contents of the beat register BTRn and stored in the beat register BTRn for part n (step S).
84) Then, the contents of the bar register BRR are decremented and stored in the bar register BRRn for part n (step S85). Steps S84 and S85 above
Is converted so that the content of the beat register BTR obtained by the step time correction of the part n becomes positive. Thereafter, the flow branches to step S90.

If it is determined in step S83 that the addition result is not smaller than "0", it is checked whether the addition result (contents of the part n beat register BTRn) is "192" or more (step S86). ). here,
If it is determined that it is equal to or greater than "192", "192" is subtracted from the contents of the part n beat register BTRn and stored in the part n beat register BTRn (step S8).
7) Then, the contents of the bar register BRR are incremented and stored in the bar register BRRn for part n (step S88). Steps S87 and S88 above
When the content of the beat register BTR exceeds one bar (192 steps) due to the step time correction of the part n, the conversion is performed so as to fall within the range of one bar. Thereafter, the flow branches to step S90.

In step S83, the addition result is "19".
2 or more, ie, “0 ≦ beat register B for part n”
When it is determined that the content of TRn <192 ”, the content of the bar register BRR is changed to the bar register BR for part n.
It is stored in Rn (step S89). In this case, the contents of the beat register BTRn for part n are the same as those set in step S82. Thereafter, the process proceeds to step S90.

When the step time correction is completed by the above-mentioned processing, unsound data is retrieved from the pattern data of part n (step S90). That is, among the pattern data included in the bar indicated by the contents of the bar register for part n BRRn, those having a step time smaller than or the same as the content of the beat register for part n BTRn are searched. Next, the key code (KCOD) in the searched pattern data and the gate time (GTI)
M) and velocity (VELO) are read (step S91).

Next, a corrected velocity of part n is generated (step S92). This processing is the same as that already described with reference to FIG. Next, the register group n corresponding to the part n is updated (step S9).
3). That is, the key code (KCOD), the gate time (GTIM), and the correction velocity (VLAn) are stored in one of the register groups n.

Next, it is checked whether the part n is on, that is, whether any of the part switches 139 to 142 corresponding to the part n is pressed (step S9).
4) If it is determined that the key is pressed, a key-on output is performed (step S95). As a result, the sound with the corrected step time and velocity is performed. On the other hand, if it is determined that the part switch has not been pressed, step S95 is skipped. Therefore, in this case, only the reading of the pattern data is performed.

Next, the part number n is incremented (step S96). If the result is not 5 or more, the process returns to step S81 to perform reading processing for the next part, and if it is 5 or more, processing for all parts is completed. Upon recognizing that the part has been read, the routine returns from the part 1-4 reading processing routine and returns to the main routine.

(6) Part 1-4 Switching Process (FIG. 11) Next, the part switching process performed in step S43 of the panel control process routine will be described. This part switching process is a process of starting or stopping sound generation of the part when the part switches 139 to 142 are pressed. In the automatic performance device of this embodiment, as described above, the pattern data of the parts 1 to 4 are always read, and it is determined whether or not to generate a sound based on the read pattern data by the part switch 139. ~ 142 is turned on.

An outline of the operation when the part switch is turned on is shown in FIG. FIG. 18 shows an operation state when the part switch n is turned on at time TB. The portion surrounded by a thick line indicates that pattern data is to be read, and the hatched portion therein indicates that the pattern data is to be read. Respectively indicates that sound is generated based on the pattern data.

In the example shown in FIG. 18, when the part switch n is turned on, the keys 1 and 2 are in the off state, so that no sound is produced. Since the keys 3 and 4 are in the ON state, the sound is produced. However, the sound of the key 3 ends within a predetermined time TR after the ON change of the part switch n is detected. Since the time is less than the predetermined time TR, the remaining gate time is equal to the predetermined time TR.
It is prolonged to be pronounced. Since the remaining gate time of the key 4 is equal to or longer than the predetermined time TR, sound generation is started as it is.

By performing such processing, a sound which should be produced in response to the on-change of the part switch n but which terminates in a short time, such as the key 3 in FIG. , So that, for example, there is no sound in which the envelope of the attack is muted without reaching the maximum value. This is a process corresponding to the case of the key 3 in FIG.

In order to realize the above functions, in the part switching process, first, the part number is initialized to "n = 1" (step S100). Next, it is checked whether or not the event of the part switch of the part n has occurred (step S101). This is performed by checking whether the bit corresponding to the part switches 139 to 142 of the part n in the panel event map is “1”. If it is determined that there is no event, the process branches to step S109. On the other hand, if it is determined that there is an event of the part switch of part n, then it is checked whether or not the event is an ON event (step S102). This is performed by checking whether the bit corresponding to the part switches 139 to 142 of the part n in the new panel data is “1”.

If it is determined that the event is an ON event, the remaining gate time of the register group n is read (step S103). That is, the remaining gate time of the key code stored in the register group n in the key-on state is read. At this time, the corrected velocity is also read. Next, it is checked whether or not the remaining gate time is shorter than the predetermined time TR (step S104). If it is determined that the remaining gate time is shorter than the predetermined time TR, the remaining gate time is doubled (step S105). It should be noted that the processing in step S105 corresponds to “remaining gate time * 2”.
The calculation is not limited to this, and various calculations can be used as long as the calculation gradually increases the remaining gate time. Thereafter, the process returns to step S104, and the same processing is repeated again. Then, steps S104 and S1
If it is determined in step S104 that the remaining gate time has become equal to or longer than the predetermined time TR by repeating the execution of step 05, a tone color is output (step S106). That is, the tone color data included in the start data in the pattern data of the part selected by the part switches 139 to 142 is output. As a result, subsequent automatic performances of the part will be produced with the timbre related to the timbre output.

Next, a key-on output is performed (step S107). At this time, the corrected velocity is also output.
Thus, sound generation based on the pattern data of part n is started. Steps S104 to S10
The processing up to step S106 via step 5 corresponds to the case of key 3 in FIG.
The process from 104 directly to step S106 without passing through step S105 is a process corresponding to the case of the key 4 in FIG.

If it is determined in step S102 that the event is an off event, a key-off output for part n is performed (step S108). That is, the register group n
Key-off output is performed for all the key codes stored in the key-on state. As a result, the sound generation of part n is stopped. Thereafter, the flow branches to step S109.

In step S109, the part number n is incremented. If the result is not 5 or more, the process returns to step S101 to perform switching processing for the next part. If it is 5 or more, processing for all parts is completed. And returns from the part 1-4 switching processing routine to return to the main routine.

(7) Timer Interrupt Processing (FIG. 12) Next, a timer interrupt processing routine will be described. In this timer interrupt processing routine, when the interrupt signal from the timer 16 is C
It is activated by being supplied to the interrupt signal input terminal INT2 of the PU 10. Therefore, the timer interrupt processing routine is started at a time interval corresponding to one step time at the tempo set at that time.

In the timer interruption processing, first, it is checked whether or not the automatic performance flag is turned on (step S120). That is, it is checked whether or not the automatic performance device is in an automatic performance state. If it is determined that the automatic performance flag is ON, the content of the beat register BTR is incremented (step S121), and it is checked whether the result is "192" or more (step S122). Then, when it is determined that the value has become “192” or more, the beat register BTR is cleared to zero (step S123), and the bar register BRR is incremented (step S124). Step S1 above
If it is determined in step S22 that the number is not equal to or larger than "192", the processing in steps S123 and S124 is skipped. The function of incrementing the bar register BRR and the beat register BTR in a connected state at each step time is realized by the processing of steps S121 to S124.

Next, the gate times of all parts are updated (step S125). That is, the remaining gate times included in the register groups of all parts other than “0” are decremented. As a result of this decrement, if there is a remaining gate time that has newly become zero, a key-off output is performed for a key code corresponding to the remaining gate time, and sound generation is stopped.

If it is determined in step S120 that the automatic performance flag is not on, it is recognized that automatic performance is not being performed, and only the gate times of all parts are updated. Thereafter, the routine returns from the timer interrupt processing routine and returns to the interrupted position.

As described above, in this embodiment, an automatic performance device that performs an automatic performance by outputting data such as a key code, gate time, velocity, etc. to a sound source, when a chord change occurs. A new key code, a gate time and a velocity of a new pattern are created in accordance with the pattern data read from the RAM 12, and the new key code in the created data and the currently generated sound stored in the register group n are generated. Compare the key code indicating the sound and if both key codes are the same,
The new key code, gate time and velocity output are suppressed. That is, retrigger based on the new key code is not performed, and the sound generation based on the key code that is already sounding is continued. Therefore, the load on the CPU 10 due to the change of the performance pattern is reduced, and the processing efficiency can be improved.

If the new key code and the key code indicating the currently sounding sound stored in the register group n are the same, the timbre of the sound to be generated based on the new key code and the register group n It checks whether the tone of the sound to be pronounced is the same based on the key code indicating the currently sounding sound stored in the memory, and if the same, suppresses the output of the new key code, gate time and velocity. I have to. Thus, for example, even in an automatic performance apparatus configured so that the timbre differs depending on the performance pattern, the output of the new key code, the gate time, and the velocity will be the same if the two key codes are the same and the timbres are the same. No retriggering is performed based on these, so that the sound that is already being sounded is continued. Therefore, also in this case, the load on the CPU 10 due to the change of the performance pattern is reduced, and the processing efficiency can be improved.

Further, for example, a key code, a gate time,
In an automatic performance device for performing an automatic performance by outputting data such as velocity to a sound source, a RAM 1
A new key code, a gate time, and a velocity corresponding to a sound to be newly generated are created in accordance with the pattern data read out from the second data, and the new key code in the created data and the register group n are stored. The key codes indicating the currently sounding sounds are compared with each other, and if they are different, if the remaining gate time corresponding to the new key code is shorter than the predetermined time TR, the correction is made so as to be longer than the predetermined time TR. Output. As a result, for example, when the performance pattern is changed, even if the remaining gate time is short, there is no sound that is muffled without reaching the maximum value of the attack envelope even if the sound is generated, and at least the sound of the attack sound is completely sounded. Done in Therefore, the musicality is not impaired even if the performance pattern is changed.

Further, for example, a key code, a gate time,
2. Description of the Related Art In an automatic performance device for performing automatic performance by outputting data such as velocity to a sound source, when sounding of a specific part is instructed, pattern data corresponding to the part is read from the RAM 12 to newly generate a sound to be sounded. A new key code, gate time, and velocity corresponding to are generated, and the new key code in the created data is compared with the key code indicating the currently sounding sound stored in the register group n. If different, if the remaining gate time of the new key code is less than or equal to a predetermined time TR, the new key code is corrected to be longer than the predetermined time TR and output. Thus, even if the performance pattern is changed at an arbitrary timing by, for example, instructing the start of reproduction of a specific part by a part switch,
Even if the remaining gate time is short and the sound is pronounced, the attack envelope does not reach the maximum value and there is no sound that is muted, and at least the attack sound is completely sounded. Therefore, the musicality is not impaired even if the performance pattern is changed.

Furthermore, for example, a key code, a gate time,
2. Description of the Related Art In an automatic performance device for performing automatic performance by outputting data such as velocity to a sound source, for example, a chord is detected based on key press data generated by receiving a key press of a keyboard device or MIDI data, and this detection is performed. When the performance pattern is changed in accordance with the input chord, the pattern data corresponding to the performance pattern is stored in a RAM.
12 to create a new key code, gate time and velocity corresponding to the sound to be newly sounded, and generate the new key code in the created data and the currently sounding sound stored in the register group n. The key codes are compared with each other, and if they differ, if the remaining gate time of the new key code is less than or equal to a predetermined time TR, the predetermined time TR
The output is corrected so as to be as described above. Thus, even if the performance pattern is changed at an arbitrary timing due to, for example, a key being pressed or a chord being detected in response to reception of MIDI data, even if the remaining gate time is short, the envelope of the attack is produced even if the sound is generated. There is no sound that is muted without reaching the maximum value, and at least the attack sound is completely generated. Therefore, the musicality is not impaired even if the performance pattern is changed.

[0124]

As described in detail above, according to the present invention,
It is possible to provide an automatic performance apparatus capable of reducing the load on the processing apparatus due to the change of the performance pattern and improving the processing efficiency. Further, it is possible to provide an automatic performance device in which musicality is not impaired even when the performance pattern is changed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an automatic performance device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of an operation panel used in the embodiment of the present invention.

FIG. 3 is a flowchart (main routine) showing the operation of the embodiment of the present invention.

FIG. 4 is a flowchart (MIDI-IN interrupt processing routine) illustrating the operation of the embodiment of the present invention.

FIG. 5 is a flowchart (panel control processing routine) showing the operation of the embodiment of the present invention.

FIG. 6 is a flowchart (MIDI-IN processing routine (No. 1)) showing an operation of the embodiment of the present invention.

FIG. 7 is a flowchart (MIDI-IN processing routine (No. 2)) showing the operation of the embodiment of the present invention.

FIG. 8 is a flowchart (correction velocity generation routine) illustrating the operation of the embodiment of the present invention.

FIG. 9 is a flowchart (part 1 to 4 read processing routine (part 1)) showing the operation of the embodiment of the present invention.

FIG. 10 is a flowchart (part 1 to 4 read processing routine (No. 2)) showing the operation of the embodiment of the present invention.

FIG. 11 is a flowchart (part 1 to 4 switching processing routine) showing the operation of the embodiment of the present invention.

FIG. 12 is a flowchart (timer interrupt processing routine) showing an operation of the embodiment of the present invention.

FIG. 13 is a diagram showing a configuration of a reception buffer used in the embodiment of the present invention.

14A is a diagram illustrating a configuration of a register group n used in the embodiment of the present invention, and FIG. 14B is a diagram illustrating a configuration of pattern data used in the embodiment of the present invention;

FIG. 15 is a diagram for explaining step time correction data used in the embodiment of the present invention.

FIG. 16 is a diagram for explaining velocity correction data used in the embodiment of the present invention.

FIG. 17 is a diagram for explaining an operation of sound generation processing when a chord changes in the embodiment of the present invention.

FIG. 18 is a diagram for explaining an operation of a tone generation process when a part switch is turned on in the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 CPU 11 ROM 12 RAM 13 Operation panel 14 Tone generator 15 Speaker system 16 Timer 17 MIDI controller 18 FD controller 19 Floppy disk drive 30 System bus 130 Bar / beat display 131 Code display 132 Tempo speed display 133 Incrementer 134 Stop switch 135 Play / pause switch 136 FF switch 137 REW switch 138 Repeat switch 139 Part 1 switch 140 Part 2 switch 141 Part 3 switch 142 Part 4 switch 143 to 150 LED display

Continuation of the front page (56) References JP-A-4-346399 (JP, A) JP-A-4-242297 (JP, A) JP-A-2-29791 (JP, A) JP-A-1-179909 (JP) , A) (58) Field surveyed (Int. Cl. ⁷ , DB name) G10H 1/00 G10H 1/18 101 G10H 1/36-1/42

Claims (3)

(57) [Claims] 1. A tone generator including at least a key code.
Automatic performance to perform automatic performance by outputting data
In the device,A code that detects a code based on input keypress data
Detecting means;  First storage storing pattern data of a plurality of parts
Means, and pattern data read from the first storage meansBefore
Change based on the code detected by the code detection means
By, A new music day corresponding to the sound to be newly pronounced
Means for creating the data, and the current musical sound data corresponding to the sound currently being produced is stored.
Second storage means;When the key press data is input, In the second storage means
A key code included in the stored current musical sound data,
Key included in the new musical sound data created by the creating means
Code is the sameIf not, output the new tone data
And stored in the second storage means as the current musical sound data.
And if they are the same, the new tone data is not output.control
Means, and an automatic performance device. (2)At least key code and gate time
Automatic performance by outputting music data containing
In the automatic performance device to be performed, A code that detects a code based on input keypress data
Detecting means; First storage storing pattern data of a plurality of parts
Means, The pattern data read from the first storage means
Change based on the code detected by the code detection means
New musical tone data corresponding to the sound to be newly pronounced
Creation means for creating data, Stores the current musical sound data corresponding to the currently sounding sound
Second storage means; When the key press data is input, the new tone data
If the remaining gate time is shorter than a predetermined time,
Control means for correcting the output so that it is above  An automatic performance device comprising: 3. An instruction means for instructing a specific part to sound.
Further comprising: the creating unit, in response to an instruction from the instruction unit,
2. The method according to claim 1, wherein new tone data is created.
3. The automatic performance device according to 2.