JPH0954580A - Automatic player and automatic playing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic player and automatic playing method capable of preventing the sustained sounding and executing smooth automatic playing even if automatic playing is stopped in mid-way of music. SOLUTION: This automatic player has a memory means 18 in which plural pieces of note data are stored and key touch detecting means 10, 16 and progresses the automatic playing by reading the note data out of the storage means every time a key touch is detected and producing sound. The automatic player described above is composed of a step value calculating means 10 which calculates the step values from the sounding of this time before the next sounding, a first control means 10 which subtracts the step value and gate time of the sounds under production respectively at the time intervals proportional to tempo and silences the sounds when the gate time attains zero in case the where key touch is not detected and a second control means 10 which starts the next sounding after respectively subtracting the step value and gate time of the sounds under production at the point of the time of detection until the step value attains zero and silences the sounds when the gate time attains zero by the subtraction in case where the key touch is detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of electronic musical instruments, and more particularly, to an automatic performance device and an automatic performance method for performing automatic performance based on automatic performance data.

[0002]

2. Description of the Related Art A conventional automatic performance device stores automatic performance data in advance in an automatic performance data memory. And
For example, when the automatic performance start switch is operated, the automatic performance data is sequentially read from the automatic performance data memory, and a sound is generated based on the read automatic performance data, so that the performance of the predetermined music is automatically performed. Done.

More specifically, the automatic performance data prepared in advance in the automatic performance data memory is composed of a set of data for generating one note (hereinafter referred to as "note data"). For example, as shown in FIG. 10, each note data is composed of key number, step time, gate time, and velocity / part data each of which is composed of 1 byte. The "key number" corresponds to the number attached to each key of the keyboard device, for example, and is used to specify a pitch (pitch). The "step time" is used to specify the timing (time) at which the sound is started. “Gate time” is used to specify the length of a sound to be pronounced (sound length). Of the "velocity / part", the "velocity" consists of, for example, 5 bits and is used to specify the strength of the sound. The "part" is made up of, for example, 3 bits and is used to specify the part to which the relevant sound belongs. The automatic performance data corresponding to one piece of music is composed of such note data arranged in the order of step time.

When the automatic performance is started, the count-up operation of the step time counter is started. The step time counter is incremented for each step. One step is, for example, 1/24, 1/48 of one beat,
It is arbitrarily defined such as 1/96, 1/128, 1/256 and the like. The real time of one beat depends on the tempo. Therefore, the real time of one step, that is, the real time interval for counting up the step time counter is determined according to the tempo.

While the step time counter is operating, one note data is read from the automatic performance data memory. Then, the step time data in the note data and the contents of the step time counter are compared. If they do not match, it is determined that the note data has not reached the tone generation timing, and thereafter this comparison operation is repeated in a predetermined cycle. In parallel with the repetition of this comparison operation, the content of the step time counter is incremented at time intervals according to the tempo. In the comparison operation, when the step time data in the note data and the contents of the step time counter match, it is determined that the note data has reached the sound generation timing, and sound generation processing is performed. In this sound generation process, sound generation having a pitch specified by the key number in the note data and a strength specified by the velocity is started. When the tone generation process for one note data is completed, the next note data is read from the automatic performance data memory, and the same process as described above is performed.

On the other hand, the sound which has started to be sounded is muted when the time designated by the gate time data in the note data elapses. The muffling is performed as follows.
That is, in the sounding process, the gate time data in the note data used for sounding is set in the gate time counter. The gate time counter is decremented step by step independently of the sound generation processing. Then, when the content of the gate time counter becomes zero, the mute processing of the sound being sounded is performed. As described above, the tone generation process and the mute process are executed one after another to automatically perform one piece of music.

By the way, in recent years, an automatic performance device with a concert magic function has been developed as one of the devices to which the technique of the automatic performance device described above is applied. Here, the "concert magic function" is a function of reading note data from the automatic performance data memory at a timing designated by the performer (for example, a key pressing timing) and starting sound generation based on the note data. . In this automatic performance device with a concert magic function, generally, the same automatic performance data as the automatic performance data used in the above-mentioned normal automatic performance device is used. However, the step time data in each note data forming the automatic performance data is not used. Instead, the pronunciation timing is given externally by the performer.

In the automatic performance device with the concert magic function, the keyboard device is simply used as a means for giving a sounding timing. Therefore, the performer can advance the automatic performance by pressing any one of the keys of the keyboard device in accordance with the timing at which the music should be sounded. In other words, in the automatic performance device with the concert magic function, the pitch and the strength of the sound are determined based on the automatic performance data, and the sounding timing is determined based on the instructions of the performer to automatically generate the musical sound. It can be called a performance device.

In the conventional automatic performance apparatus, when the automatic performance start switch is operated, a predetermined piece of music is automatically performed, so that there is no room for the performer to intervene. In the apparatus, the player performs the automatic performance by instructing the sounding timing, so that the player can be satisfied that he is playing.

[0010]

By the way, in the above-mentioned automatic musical instrument having the concert magic function, some methods have been considered to mute the sound at which the sound generation is started. The first method is to mute the sound being generated by forcibly advancing the contents of the step time counter when a key is pressed. The second method is a method of muting a sound being generated by pressing a key. The third method is a method of muting all the sounds being sounded when all keys are released.

However, each of the above methods has drawbacks. In the first method, when a key is pressed, only one note data is read from the automatic performance data memory, and the step time data contained in the note data is compared with the contents of the step time counter. It When it is determined that they do not match, the content of the step time counter is incremented, and the content of the gate time counter (hereinafter, simply referred to as “gate time”) corresponding to the note that is being sounded at that time. Decremented. Hereinafter, the above operation is forcibly repeated until the step time data included in the note data and the content of the step time counter match. This repetitive operation is performed at high speed irrespective of the real time of one step described above. Then, when the step time data included in the note data and the contents of the step time counter match, sound is generated based on the note data. Further, the sound of which the gate time becomes zero by the above repeating operation is muted. As a result, when a key is pressed, one sound based on one note data is always generated, and a sound that was generated before the key was pressed is muted. Function has been realized.

However, according to this first method,
The sound cannot be muted unless the gate time of the sound being sounded reaches zero. However, if the gate time is not decremented by the next key press, the gate time of the note being sounded will not reach zero, so if you stop the operation (key press) to advance the automatic performance in the middle of the song, , There was a problem that the sound being produced continued to sound without being muted.

The second method is a method of detecting that a key is pressed and muting the sound being generated regardless of the step time and the gate time. However, also in this case, as in the case of the first method described above, the sound being produced is not muted unless the next key is pressed, so the song is stopped halfway without playing it to the end. In this case, there is a problem that the sound being sounded continues to sound without being muted. In the first and second methods, when the automatic performance is performed up to the end of the song, a new pronunciation is not started at the last automatic performance data (this is called "end mark"). There is no problem that the sound of continues to sound without being muted.

Therefore, in order to solve the problems of the first and second methods, the third method is considered. In the third method, when all keys are released, all sounds being sounded are muted. Therefore, if all the keys are released in the middle of the song and the operation of advancing the automatic performance is stopped, the problem that the sound being sounded is not muted but continues to sound does not occur. But,
For example, when an automatic performance is performed using only one key of the keyboard device, when that key is released, all keys are released. Therefore, there is a problem that the sound being sounded is muted each time the key is released, and the sound is interrupted as if playing staccato, which prevents smooth playing.

The present invention has been made in order to solve the problems of the conventional automatic performance device having the concert magic function, and the sound is produced even if the player stops the operation of the automatic performance in the middle of the song. It is an object of the present invention to provide an automatic performance device and an automatic performance method capable of performing a smooth automatic performance even when only one key is used, without continuously ringing.

[0016]

In order to achieve the above-mentioned object, the automatic performance device of the present invention includes at least data representing a step time defining a sounding timing and data representing a gate time defining a note length. And a key-depression detecting means for detecting that a key-depression has been performed. Each time the key-depression detecting means detects that a key-depression has been performed, An automatic performance device for advancing an automatic performance by reading note data from a storage means and starting sound generation based on the read note data. When a key depression is not detected by the step value calculation means for calculating the step value up to the step time of the sound to be sounded next, and the key depression detection means,
Decrement the step value and the gate time corresponding to the sound being sounded at time intervals proportional to the tempo,
When a key press is detected by the first key control means for muting the sound when the gate time becomes zero and the key press detecting means,
After decrementing the step value and gate time corresponding to the sound being sounded at the time of detection until the step value becomes zero, the next sound is started to be sounded, and when the gate time becomes zero due to the decrement, The second control means is provided to mute the sound being produced.

In the present automatic performance device, sound generation is started by a player's instruction (key depression), but the sound once sound generation is started is the same as in the conventional automatic performance device.
The gate time corresponding to the sound is decremented at time intervals proportional to the tempo, and the sound is muted when the gate time becomes zero. As this "time interval proportional to tempo", for example, one step time can be used. Therefore, the sound being sounded is muted when the time designated by the gate time in the note data that is the source of the sound elapses. As a result, even if the performer stops the operation of advancing the automatic performance in the middle of the music, the sound does not continue to sound. On the contrary, even when all the keys are released, the sound being sounded is not muted until the time specified by the gate time in the note data that is the source of the sound elapses. Therefore, even when the automatic performance is advanced using only one key, the smooth automatic performance can be performed without the sound being interrupted.

Further, once the sound generation is started, the step value and the gate time are decremented at time intervals proportional to the tempo, and if left unattended, the sound is muted when the gate time becomes zero. However, when a new key depression is detected during the decrement, sound generation based on the new note data is started. That is, if the step value is not zero when a new key is detected (this state occurs when the key is pressed earlier than the original sounding timing), the step value at the time when the key is detected is detected. And the decrement starts from the gate time. This decrement is performed at a high speed, for example, regardless of the time interval proportional to the tempo. Then, when the step value becomes zero due to this decrement, sound generation based on the next new note data is started. At this time, if the gate time becomes zero during the decrement, the sound being sounded is muted.

Thus, for example, even when the player presses a key earlier than the original sounding timing, the gate time is adjusted (shortened) so that the gate time becomes the same as when the key is pressed at the original sounding timing. Therefore, when the pronunciation of the next new sound is started, it is possible to avoid a situation in which the sound that is already being sounded remains without being muted and the sounds overlap. Note that if the gate time does not reach zero due to the above decrement, the pronunciation will continue, but since this is the case where the automatic performance data is created so that two or more notes are produced, the note that is already being pronounced and a new note will be generated. There is no problem in overlapping with the sound that started to sound.

On the other hand, if the step value is zero when the key depression is detected (this state occurs when the key is depressed later than the original tone generation timing), the tone generation based on the new note data is immediately started. To be done. At this time, since the sound to be muted by the sounding timing has already been muted, the newly sounded sound does not overlap with the sound being sounded, but the sound is cut off early. Note that the automatic performance data is 2 for sounds that continue to be sounded at the sounding timing.
This is a case in which the sound is produced so as to generate more than the sound, so there is no problem in overlapping with the sound that has been newly generated.

Further, the present automatic performance device further comprises tempo detecting means for detecting a tempo based on the key pressing interval detected by the key pressing detecting means, and the time interval proportional to the tempo is the tempo detecting means. It can be configured to determine based on the tempo detected in. This tempo detecting means is, for example, the real time of the two key depression intervals detected by the key depression detecting means and the step time data in the two note data read from the memory means in response to the two key depressions. It can be configured to detect the tempo from the ratio to the difference between.

Here, the detected tempo is reflected in the above-mentioned "time interval proportional to tempo". Therefore,
The time until the generated sound is muted is always corrected according to the key depression interval of the performer. In other words,
When the sounding timing designated by the player, for example, by the keyboard is deviated, the tempo is corrected in accordance with the deviated timing and the sound is produced. Therefore, it is possible to perform the automatic performance according to the intention of the player.

Further, as described above, when a key is pressed later than the original sounding timing, a situation occurs in which the sound is interrupted earlier, but this is slightly delayed from the tempo detected by the tempo detecting means. The time interval proportional to the tempo may be determined based on the corrected tempo. As a result, for example, it is possible to avoid a situation in which the sound is interrupted even if the player takes time to press the key and the key is delayed.

Further, in order to achieve the above object, the automatic playing method of the present invention stores the data and the sound representing the step time which defines at least the stored sounding timing each time it is detected that a key is pressed. An automatic performance method of advancing an automatic performance by reading out note data including data representing a gate time defining a length and starting sound generation based on the read note data, wherein at the start of sound generation, The step value from the step time of the sound to be sounded this time to the step time of the sound to be sounded next is calculated, and when the key depression is not detected, the step value corresponding to the sound being sounded and The gate time is decremented at time intervals proportional to the tempo, the sound is muted when the gate time reaches zero, and the key is detected when a key press is detected. The step value and gate time corresponding to the sound being sounded at the point are decremented until the step value becomes zero, and then the next sound is started to sound, and when the gate time becomes zero by the decrement, the sound is being generated. It is characterized by muting the sound of.

As a result, like the above automatic performance device,
Even if the performer stops the operation of advancing the automatic performance in the middle of the song, the sound does not continue to sound. Conversely, even if all keys are released, the sound being sounded is not muted until the time specified by the gate time in the note data that is the source of the sound has passed, so one key Even when the automatic performance is advanced using only, the smooth automatic performance can be performed without the sound being interrupted.

The time interval proportional to the tempo is
It can be determined based on the tempo detected based on the key depression interval. As a result, even if the sounding timing indicated by the performer, for example, on the keyboard, is shifted, the tempo is corrected in accordance with the shifted timing, and the sound is produced, enabling automatic performance according to the performer's intention. Become.
In addition, the detected tempo is corrected slightly later, and based on this corrected tempo, "time interval proportional to tempo"
By determining, it is possible to avoid a situation in which the sound is interrupted even if the player takes time to press the key and the key is delayed.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an automatic playing device and an automatic playing method of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the structure of the automatic musical instrument of the present invention. This automatic performance device is a central processing unit (hereinafter referred to as “CP
U ". ) 10, a program memory 12, a work memory 13, a panel interface circuit 14, a keyboard interface circuit 16, an automatic performance data memory 18, a waveform memory 19 and a tone generator 20. The system bus 30 is a bus line for transmitting and receiving, for example, an address signal, a data signal or a control signal.

Each part of the key depression detecting means and tempo detecting means of the present invention, the step value calculating means, and the first and second control means are realized by the processing of the CPU 10. C
The PU 10 controls the entire automatic performance device according to a control program stored in the program memory 12. Details of the processing performed by the CPU 10 will be described later. A timer 10a is connected to the CPU 10 and generates an interrupt signal at regular time intervals, for example, at 2 millisecond intervals. The timer 10a can change the generation interval of the interrupt signal by setting predetermined data from the CPU 10. The tempo value detecting means of the present invention can be configured by the processing of the timer 10a and the CPU 10. The interrupt signal generated by the timer 10a is supplied to the CPU 10 and serves as a trigger for activating an interrupt processing routine described later. Also, this CPU 10
An external interface circuit 11 is connected to.

The external interface circuit 11 is used to control transmission / reception of data between the present automatic performance device and an external device. The external interface circuit 11 may be, for example, MI depending on the type of equipment connected to the outside.
DI interface, RS232C interface, S
A general-purpose interface such as a CSI interface or various interfaces having a unique standard can be used. Examples of the external device include other electronic musical instruments, personal computers, sequencers, and the like.

The external interface circuit 11 receives the data sent from the external device and sends it to the CPU 10. The CPU 10 performs sound generation processing based on this data and changes the setting state of the operation panel 15. vice versa,
Data generated by operating the operation panel 15 and keyboard device 17 described later are transmitted to the external device via the external interface circuit 11. This allows
It is possible to control an external device from the operation panel 15 and the keyboard device 17 of the automatic performance device. In the following, a MIDI interface circuit is used as the external interface circuit 11.

The program memory 12 can be composed of, for example, a read only memory (hereinafter referred to as "ROM"). The program memory 12 stores various fixed data used by the CPU 10 in addition to the control program described above. This program memory 12
In addition, a plurality of tone color parameters for designating a tone color corresponding to a plurality of tone ranges of a plurality of instrument sounds are stored. One timbre parameter is used to define the timbre of a predetermined musical range of a predetermined musical instrument sound. Each timbre parameter is composed of, for example, a waveform address, frequency data, envelope data, filter coefficient and the like. The program memory 12 can also be configured by a random access memory (hereinafter referred to as “RAM”). In this case, the control program, fixed data, tone color parameters and the like may be loaded into a program memory (RAM) prior to operating the present automatic performance device.

The work memory 13 is used for temporarily storing various data when the CPU 10 performs various processes. In this work memory 13, various registers, counters, flags and the like for controlling the present automatic performance device are defined. The main registers, counters, flags, etc. are shown below. It should be noted that, except for the following, they will be described each time they appear below. (1) Automatic performance flag: This flag stores whether or not the automatic performance device is in the automatic performance mode. (2) Concert magic flag (CM flag): This automatic performance device is in the concert magic mode (CM mode)
Is a flag that stores whether or not (3) Address register: Holds an address (hereinafter referred to as "read address") in the automatic performance data memory 18 in which the automatic performance data currently being executed is stored. (4) Data read request flag: This is a flag that is set when a key is pressed, and the automatic performance data memory 1
8 is used to indicate that note data should be read. (5) Simultaneous press timer counter: A counter that is decremented each time a timer interrupt occurs, and is used to determine whether or not there is a simultaneous key press. (6) Rewind timer counter: A counter that is decremented each time a timer interrupt occurs, and is used to determine whether or not a fixed time has elapsed since the concert magic performance was stopped. (7) Clock counter: A counter that is incremented each time a timer interrupt occurs. (8) Read Timing Counter: This is a counter that is incremented at an interval (time corresponding to one step time) according to the tempo set at that time. When the content of the read timing counter changes, it is recognized that it is a timing (hereinafter, referred to as "check timing") for checking whether or not it is the sound generation timing. (9) Off counter: A register that stores the step value from the sound being sounded to the sound to be sounded next. At the start of sounding, the difference between the step time in the note data corresponding to the note and the step time in the note data corresponding to the note to be sounded next is set.

An operation panel 15 is connected to the panel interface circuit 14. Although not shown on the operation panel 15, various switches for controlling the present automatic performance device, for example, an automatic performance start switch, a concert magic switch (CM switch), a music selection switch, a tone color selection switch, a sound effect designation switch, A volume switch and the like are provided. Further, an LED display for displaying the setting state of each switch, an LCD display for displaying a message for the performer to interact with the automatic performance device, and the like are provided.

Of the various switches described above, the main switches will be briefly described. The automatic performance start switch is used by the performer to control the start or stop of the automatic performance. This automatic performance start switch can be constituted by, for example, a push button switch. The setting state of the automatic performance start switch is stored by the automatic performance flag described above. The automatic performance flag is inverted every time the automatic performance start switch is pressed. That is, when the automatic performance start switch is pressed while the automatic performance is stopped (automatic performance flag = 0), the automatic performance flag is set to "1" and the automatic performance is started. On the other hand, when the automatic performance start switch is pressed during automatic performance (automatic performance flag = 1), the automatic performance flag is cleared to "0" and the automatic performance is stopped.

The CM switch is used to specify whether to use the concert magic function. This CM switch can be configured by, for example, a push button switch. The setting state of this CM switch is the above-mentioned CM.
Stored by flag. The CM flag is inverted each time the CM switch is pressed. That is, when the CM switch is pressed while not in the CM mode (CM flag = 0), the CM flag is set to "1" and the CM mode is entered. on the other hand,
When the CM switch is pressed in the CM mode (CM flag = 1), the CM flag is cleared to "0" and the normal performance mode is entered.

The panel interface circuit 14 has a C
Each switch on the operation panel 15 is scanned according to a command from the PU 10. Panel interface circuit 14
Creates panel data in which each switch corresponds to one bit based on a signal indicating the open / closed state of each switch obtained by this scan. Each bit represents, for example, "1" to be on, and "0" to be off. This panel data is sent to the CPU 10 via the system bus 30. This panel data is used to determine whether an on or off event of a switch on the operation panel 15 has occurred (details will be described later).

Further, the panel interface circuit 14 is
The display data sent from the CPU 10 is transmitted to the operation panel 1
5 Send to the display above. As a result, a message according to, for example, character data sent from the CPU 10 is displayed on an LCD display (not shown), and an LED display (not shown) is turned on / off.

A keyboard device 17 is connected to the keyboard interface circuit 16. The keyboard device 17 has a plurality of keys. The keyboard device 17 is usually used for instructing the sound generation of a sound corresponding to the key by pressing the key and for muting the sound corresponding to the key by releasing the key. On the other hand, in the CM mode, it is used as a trigger for advancing the automatic performance (more specifically, a trigger for reading the next note data). As the keyboard device 17, for example, a two-contact type keyboard device in which first and second key switches that are turned on at different pressing depths are provided for each key can be used.

The key depression detecting means of the present invention is realized by the keyboard interface circuit 16 and the CPU 10. The keyboard interface circuit 16 scans each key switch on the keyboard device 17 in response to a command from the CPU 10. The keyboard interface circuit 16 creates keyboard data based on the signal indicating the open / closed state of each key switch obtained by this scanning. The keyboard data consists of a bit string in which each key is associated with 1 bit, and each bit represents, for example, "1" indicating that a key is being pressed and "0" indicating that a key is being released. At this time, for example, when both the first and second key switches are turned on, data of "1" indicating that the key is being pressed is created, and in other cases, the key is being released. Can be configured to produce "0" data.

Further, in the keyboard interface circuit 16,
The time from when the first key switch is turned on by pressing the key until the second key switch is turned on is measured,
Velocity data is created based on this measured time. These keyboard data and velocity data are sent to the CPU 10 via the system bus 30. CPU
10 determines whether or not there is a keyboard event based on the keyboard data (details will be described later). The keyboard interface circuit 16 and the keyboard device 17 are electronic string instruments,
Electronic wind instruments, electronic percussion instruments, and computer keyboards can be substituted. In this case, data corresponding to the above keyboard data and velocity data is sent to the CPU 10 from these electronic string instruments and the like. And CPU1
0 can be configured to determine the presence or absence of an event based on these data.

The automatic performance data memory 18 corresponds to a storage means, and can be constituted by, for example, a ROM. The automatic performance data memory 18 stores automatic performance data corresponding to a plurality of songs. These automatic performance data are used for normal automatic accompaniment, automatic performance using the concert magic function, demonstration performance, and the like. An identifier called “song number” is attached to each automatic performance data, and the user can operate the operation panel 15
Any song can be selected by specifying the song number using the above song selection switch. The automatic performance data corresponding to each of these pieces of music is composed of a set of note data, as described in the section of the prior art. The automatic performance data memory 18 can be composed of a RAM, a ROM card, a RAM card, a floppy disk, a CD-ROM or the like. When a floppy disk or a CD-ROM is used as the automatic performance data memory 18, the automatic performance data stored therein is temporarily loaded into the RAM, and R
It is preferably arranged to access the automatic performance data in the AM.

The waveform memory 19 stores waveform data corresponding to each timbre parameter. The waveform data can be created by pulse code modulation (PCM) of a musical tone signal obtained by recording a natural musical instrument sound, for example. The waveform memory 19 can be composed of, for example, a ROM. The waveform data stored in the waveform memory 19 is read by the sound source 20.

The sound source 20 has a plurality of oscillators. Although not shown in detail, the sound source 20 is composed of a waveform reading circuit for reading waveform data from the waveform memory 19, an envelope generation circuit for adding an envelope to the waveform data read by the waveform reading circuit, and the like. . When there is a key depression of the keyboard device 17, reception of note-on data from the external interface circuit 11, or reading of note data, the CPU 10 assigns at least one oscillator for sound generation, and assigns a tone color parameter to the assigned oscillator. To supply. The oscillator to which the sound in the sound source 20 is assigned starts to generate a digital musical tone signal by receiving the tone color parameter. That is, the waveform data is sequentially read from the waveform memory 19 and the envelope is added to this to generate a digital tone signal.

The digital tone signal generated by the sound source 20 is converted into an analog signal by the D / A converter 21, then amplified by the amplifier 22 and sent to the speaker 23.
Then, the speaker 23 converts the sound signal and outputs the sound.

Next, the operation of the automatic musical instrument having the above-mentioned structure will be described with reference to the flow charts shown in FIGS. It should be noted that the operations shown in the respective flowcharts are all realized by the processing of the CPU 10.

(1) Main Processing FIG. 2 is a flow chart showing the main routine of the present automatic performance device. This main routine 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, C
The internal hardware of the PU 10 is set to the initial state, and the registers defined in the work memory 13
Initial values are set in counters, flags, and the like. Further, in this initialization processing, processing is performed to prevent generation of unnecessary sound when power is turned on by sending predetermined data to the sound source 20.

When this initialization process is completed, a switch event process is then performed (step S11). In this switch event process, first, the presence or absence of a switch event is checked. That is, the CPU 10 takes out one panel data (hereinafter, referred to as “new panel data”) from the scan buffer which is updated at a constant cycle in the timer interrupt process described later, and the new panel data register provided in the work memory 13. To store. Next, the new panel data and the panel data (hereinafter, referred to as “the panel data” stored in the old panel data register already provided in the work memory 13 and fetched by the previous switch event process)
It is called "old panel data". ) And an exclusive OR of the panel event map. If this panel event map is zero, it is determined that the switch event has not occurred, and if it is not zero, it is determined that the switch event has occurred.

For example, if the bit corresponding to the automatic performance start switch in the panel event map is "1" and the bit corresponding to the automatic performance start switch in the new panel data is "1", the automatic performance start is started. It is determined that a switch on event has occurred, and the automatic performance flag is inverted. When the automatic performance flag is set to "1" by this inversion, the start address of the automatic performance data of the music designated by the song number selected at that time is set in the address register. As a result, the read address of the automatic performance data is determined. In addition, "the song number selected at that time" is the operation panel 1 previously performed.
By operating the song selection switch on 5, the work memory 13
It is set in the song number register defined in.

Similarly, if the bit corresponding to the CM switch in the panel event map is "1" and the bit corresponding to the CM switch in the new panel data is "1", the on event of the CM switch is It is determined that it has occurred, and the CM flag is inverted. In addition, for example, when it is determined that the event is a tone color selection switch event, the currently set tone color is changed to the tone color corresponding to the tone color selection switch in which the event occurred. Thus, in the switch event processing, the operation panel 15
Processing for implementing the function assigned to each switch above is executed. Then, finally, the new panel data is moved to the old panel data register, and the switch event process ends.

In the main routine, keyboard event processing is then performed (step S12). In this keyboard event process, the presence or absence of a keyboard event is first checked.
That is, the CPU 10 fetches keyboard data (hereinafter referred to as “new keyboard data”) from the keyboard interface circuit 16 and stores it in a new keyboard data register provided in the work memory 13. Next, this new keyboard data and the work memory 13 already loaded by the previous keyboard event processing are stored.
The keyboard event map is created by exclusive ORing with the keyboard data stored in the old keyboard data register (hereinafter referred to as "old keyboard data"). If a bit of "1" exists in this event map, it is determined that a key event corresponding to the bit has occurred, and if not, it is determined that no keyboard event has occurred. Then, it is checked whether the keyboard event is a key pressing event or a key releasing event. This is done by looking up the bit in the new keyboard data that corresponds to the bit that is "1" in the keyboard event map. That is, if the corresponding bit in the new keyboard data is "1", it is determined that there is a key depression event, and the key depression event process is performed. On the other hand, if "0", it is determined that there is a key release event, and the key release event process is performed. Details of the key press event processing and the key release event processing will be described later.

Next, MIDI processing is performed (step S13). In this MIDI processing, sounding and muting are performed based on the MIDI data received by the external interface circuit 11. This MIDI processing itself is not directly related to the present invention, so its explanation is omitted.

Then, an automatic performance process is performed (step S14). In this automatic performance processing, concert magic performance processing, automatic accompaniment processing, demonstration processing and the like are performed. Details of these will be described later.

Then, "other processing" is executed (step S15). In this "other processing", processing other than the above-mentioned processing, for example, processing for realizing a special operation when the switch is kept pressed, or the like, which requires regular checks in the main routine, is performed. After that, the process returns to step S11, and the following steps S11 to S15.
Is repeated. When a switch event or a keyboard event occurs or data is received by the external interface circuit 11 in the course of this repeated execution, processing corresponding to them is performed, and sound generation processing based on automatic performance data is performed. As a result, various functions as an automatic performance device are realized.

(2) Timer Interrupt Processing The timer interrupt processing is executed by interrupting each processing of the main routine according to an interrupt signal generated from the timer 10a. Details of this timer interrupt processing are shown in the flowchart of FIG.

In this timer interrupt process, first, a panel scan is performed (step S20). That is, CPU1
0 captures panel data from the panel interface circuit 14 and sequentially stores it in a scan buffer formed on the work memory 13, for example. This scan buffer can be configured as a FIFO memory that operates under the control of the CPU 10, for example. Instead of forming a FIFO memory on the work memory 13, a FIFO buffer may be used to form a scan buffer. Next, the content of the clock counter is incremented (step S21). Therefore, this clock counter is, for example, 2
It will be incremented every millisecond.

Then, it is checked whether or not the content of the clock counter has reached a predetermined value (step S22). Here, the predetermined value is a value corresponding to one step time in the tempo set at that time (stored in the tempo register provided in the work memory 13). When it is determined that the value is the predetermined value, the content of the read timing counter is incremented (step S23). The contents of this read timing counter are
It is referred to in an automatic performance process, which will be described later, and is used to determine whether or not the above-described check timing has arrived. This check timing is also used as the timing for decrementing the gate time. If it is determined in step S22 that the value is not the predetermined value, the process of step S23 is skipped.

Next, a concert magic simultaneous pressing timer process is performed (step S24). In this process,
The contents of the simultaneous push timer counter are decremented.
Next, a concert magic rewind timer process is performed (step S25). In this process, the contents of the rewind timer counter are decremented. After that, the process returns from this timer interrupt processing routine and returns to the interrupted position of the main routine. In the present embodiment,
Although the panel scan is configured to be performed in the timer interrupt process, it may be configured to be performed in the switch event process (step S11) of the main routine (FIG. 2).

(3) Key Press Event Processing Details of the key press event processing are shown in the flowchart of FIG. In the key-depression event process, it is first checked whether or not the concert magic mode (CM mode) is set (step S31). This is done by examining the CM flag, and so on. Here, if it is determined that the CM mode is not set, a normal sounding process corresponding to the key depression is performed (step S39). In this normal sound generation processing, the key number of the key having the key depression event is calculated, and the keyboard interface circuit 16
The velocity data corresponding to the key is read from. Then, the timbre parameter corresponding to the key number is read from the program memory 12 and sent to the sound source 20 together with the velocity data. As a result, the sound corresponding to the key depression is generated from the speaker 23 with the strength corresponding to the key depression.

When it is determined in step S31 that the CM mode is set, it is then checked whether or not the automatic performance is being performed (step S32). This is done by looking at the automatic performance flag, and so on. Here, if it is determined that the automatic performance is being performed, the process branches to step S39, and normal sound generation processing is performed. As a result, in the CM mode and during automatic performance, a sound corresponding to the keyboard operation is generated. Therefore, in combination with the normal mute processing (step S55) in the key release event processing, which will be described later, the player can play a melody or the like by the keyboard device 17 with the automatic performance as a background, for example.

On the other hand, if it is determined in step S32 that the automatic performance is not being performed, then a process for realizing the concert magic function is performed. That is, first, the velocity and the key number are saved (step S3).
3). Specifically, the key number of the key having the key depression event is calculated, the velocity data corresponding to the key is read from the keyboard interface circuit 16, and is saved in a predetermined buffer area of the work memory 13.
The key number saved here is used in the concert magic main process, which will be described later, to determine whether or not to proceed with automatic performance when the automatic performance device operates in the split mode. Further, the velocity is used to control the volume when performing sound generation based on the note data in the concert magic main process described later.

Then, it is checked whether or not two or more keys are simultaneously pressed (step S34). This is judged by checking whether or not a predetermined time, for example, about 30 milliseconds has elapsed from the previous key depression to the current key depression. More specifically, this is performed by checking whether or not the content of the simultaneous pressing timer counter set in the previous key pressing event processing is zero. When it is determined that the keys are pressed simultaneously, the key pressing event processing routine is not performed and the processing returns to the main routine. That is, if it is determined that the keys are pressed simultaneously, the subsequent key pressing is ignored. In this way, when one key is pressed and the predetermined time has not elapsed until the next key is pressed, by ignoring the subsequent key presses, for example, two or more keys are mistakenly pressed at the same time. In this case, it is possible to prevent the automatic performance from accidentally advancing.

On the other hand, when it is determined that the simultaneous pressing is not performed, first, the data read request flag is set (step S35). This data read request flag is referred to in an automatic performance process performed later. Then
A predetermined value is set in the simultaneous pressing timer counter (step S36). As the predetermined value, as described above,
For example, the data necessary for measuring the elapsed time of about 30 milliseconds is used. Next, a predetermined value is set in the rewind timer counter (step S37). As this predetermined value, for example, data necessary for measuring the passage of time of about 1 minute is used. As will be described later, this rewind timer is used to return the contents of the address register to the beginning of the automatic performance data of the piece of music when the automatic performance does not proceed even after a lapse of a predetermined time. Next, tempo data set processing is performed (step S38). Details of the tempo data set processing are shown in the flowchart of FIG.

The tempo detecting means of the present invention is realized by this tempo data set processing. In the tempo data set process, first, step time data in new note data (note data used for sound generation in the key depression event process) is extracted (step S40). The step time data fetched here is the work memory 1
3 is stored in the new step time register. Next, the step check value is calculated (step S41). That is, from the above step time data stored in the new step time register, the step time data (previously sounded immediately before being taken out by the previous tempo data set process and stored in the old step time register already provided in the work memory 13) is generated. The step time data) of the processed note data is subtracted. Then, the data obtained by this subtraction is used as the step check value.

Next, the contents of the clock counter are taken out (step S42). The contents of the clock counter fetched here are stored in a new clock register provided in the work memory 13. Next, the timer check value is calculated (step S43). That is, from the clock data stored in the new clock register, the clock data extracted in the previous tempo data set process and stored in the old clock register already provided in the work memory 13 (the sound generation process was performed immediately before was performed. The clock data taken out at times) is subtracted. Then, the data obtained by this subtraction is used as the timer check value.

Then, the tempo check value is calculated (step S44). This tempo check value can be calculated, for example, by the following equation (1). Tempo check value = step check value × K / timer check value (1) Here, K is a constant for obtaining a tempo check value of an appropriate size.

The tempo check value calculated based on the above equation (1) represents a step value per unit time. Therefore, the tempo can be calculated based on this tempo check value. Note that the method of obtaining the tempo check value is not limited to the method according to the above equation (1), and any method can be used as long as it can calculate the ratio of the step check value and the timer check value.

Next, the tempo value is calculated (step S45). The tempo value can be calculated, for example, by quantizing the tempo check value obtained by the above equation (1) with an appropriate width and referring to the table with the quantized value. In this table, tempo values are stored in advance corresponding to the respective values to be quantized. This table may be created in the program memory 12 in advance. The tempo value can be calculated using a predetermined calculation formula instead of referring to the table.
The tempo value calculated in step S45 is more accurate than the accurate tempo value calculated from the step check value and the timer check value in order to prevent the sound from being interrupted early due to the variation in the key press interval. It is preferable to keep the value slightly slower.

The tempo value calculated in this manner is stored in the tempo register provided in the work memory 13. The contents of the tempo register are referred to in step S22 of the above-mentioned timer interrupt process to determine whether or not the contents of the clock counter have reached a predetermined value. Next, a data update process is performed (step S4).
6). That is, the contents of the new step time register are moved to the old step time register and the contents of the new clock register are moved to the old clock register, respectively, to prepare for the tempo data setting process at the next key depression. After that, the process returns from this tempo data set processing routine to return to the key pressing event processing routine, and also returns from the key pressing event processing routine to return to the main routine.

(4) Key Release Event Processing Details of the key release event processing are shown in the flowchart of FIG. In the key release event processing, it is first checked whether or not the concert magic mode (CM mode) is set (step S51). Here, when it is determined that the CM mode is not set, normal muffling processing is performed (step S55). In this mute processing, the key number of the key having the key release event is calculated. Then, the envelope data that attenuates at a high speed is sent to the oscillator that is sounding and that corresponds to this key number. As a result, the sound being sounded is muted in response to the key release.

When it is determined in step S51 that the CM mode is set, it is then checked whether or not the automatic performance is being performed (step S52). Here, if it is determined that the automatic performance is being performed, the process branches to step S55, and normal mute processing is performed. As a result, in the CM mode and during automatic performance, the sound is muted according to the key release operation. Therefore, in combination with the normal sounding process (step S39) in the above-mentioned key depression event process, for example, the melody performance by the keyboard device 17 can be performed with the automatic performance as the background.

On the other hand, when it is determined in step S52 that the automatic performance is not being performed, the key release event processing routine is returned to the main routine. In the concert magic mode, the sound being sounded is decremented every one step time of the gate time corresponding to the sound, and is muted when the gate time becomes zero. This muffling process
It is performed in the concert magic performance process described later. Therefore, even if there is a key release event, no processing is performed on the key release event.

(5) Automatic Performance Processing Next, details of the automatic performance processing performed in step S14 of the main routine will be described. In this automatic performance process, as described above, the concert magic performance process, the automatic accompaniment process, the demonstration process, etc. are performed. Here, the details of the concert magic performance process will be described, and the automatic accompaniment process and the demonstration process will be described. Omit it. Details of the concert magic performance process are shown in the flowchart of FIG.

In the concert magic performance processing, first,
It is checked whether or not the automatic performance is being performed (step S6).
1). Then, when it is determined that the automatic performance is being performed,
Normal automatic performance processing is performed (step S62). In this normal automatic performance processing, the step time data in the note data is compared with the contents of the step time counter at the check timing, and when they match, it is determined that the sound generation timing has arrived and the automatic performance data memory 18 outputs the musical note. The data is read. Then, sound is produced based on the note data. This allows
The automatic performance according to the original sounding timing (step time) of the automatic performance data is performed at a predetermined tempo. Since the contents of this normal automatic performance process are well known, detailed description will be omitted.

When it is determined in step S61 that the automatic performance is not being performed, the concert magic performance process is performed. That is, it is first checked whether the rewind timer is zero (step S63). When it is determined that the rewind timer is zero, the read address (contents of the address register) of the automatic performance data is reset (step S64). That is, the start address of the music piece selected at that time is set in the address register as the read address. As a result, if there is no keyboard operation even after a lapse of a predetermined time (for example, 1 minute),
Next time, when the keyboard is operated, the concert magic performance is started from the beginning of the song. If it is determined in step S63 that the rewind timer is not zero, step S64 is skipped.

Then, it is checked whether or not the data read request flag is "1", that is, whether or not there is a key depression (step S65). Here, if it is determined that the data read request flag is "0", it is recognized that no key has been pressed, and a process of muting the sound being sounded according to the gate time is performed (steps S66 to S7).
0). In this process, the gate time of the sound being sounded is decremented at every step time (at a time interval proportional to the tempo), and a process of muting the sound when the gate time becomes zero is performed. The first control means of the present invention is realized by the processing of these steps S66 to S70.

That is, first, it is checked whether or not the content of the read timing counter is zero (step S6).
6). Here, if it is determined that the content of the read timing counter is zero, no processing is performed and the routine returns from the concert magic performance processing routine to the main routine. Here, the fact that the content of the read timing counter is zero means that the check timing has not been reached. In other words, it means that the time for one step time has not elapsed from the previous check timing, and the timing for decrementing the gate time has not come.

This concert magic performance processing routine is called from the main routine in a predetermined cycle, and if there is no key depression, step S66 is executed in a predetermined cycle. In parallel with this, the content of the clock counter is incremented in the timer interrupt processing routine, and the content of the read timing counter is incremented when one step time has elapsed from the previous check timing (FIG. 3).
reference). Therefore, when one step time has elapsed from the previous check timing, it is determined in step S66 that the content of the read timing counter is not zero. If it is determined in step S66 that the content of the read timing counter is not zero, automatic performance gate-off processing is performed (step S67). In the automatic performance gate-off processing, the automatic performance assigner searches for a channel to which a sound is assigned and is sounding. If there is a corresponding channel, the gate time is decremented. As a result, the mute processing is performed. Since this automatic performance gate-off processing routine is called at the time when the check timing is reached, it has a function of decrementing the gate time at a time interval proportional to the tempo, that is, at each step time, and muting the sound. The details of this automatic performance gate-off processing are shown in the flowchart of FIG.

Here, the automatic performance gate-off process will be described. In this automatic performance gate-off process, it is first checked whether or not the channel is sounding (step S100). When it is determined that the sound is not being generated, the process branches to step S105 to check whether there is an unprocessed channel. When it is determined that there is no unprocessed channel, the automatic performance gate off processing routine returns.

On the other hand, if it is determined in step S105 that there is an unprocessed channel, the process returns to step S100 and the same process is performed. In step S100 above,
When it is determined that the channel is sounding, whether or not the gate time of the channel is “00H” (“H” at the end indicates a hexadecimal number. The same applies below). Is checked (step S1
01). Here, if it is determined that the gate time is "00H", the process branches to step S104, and the sound deadening process of the sound corresponding to the channel is performed. This muffling process is performed by the same method as the muffling process in step S55 of FIG. 6 described above. On the other hand, the gate time is "00
If it is determined that it is not "H", the gate time of the channel is decremented (step S102).
Then, it is checked whether or not the gate time is "00H" (step S103). Here, if it is determined that the gate time is "00H", step S10 is performed.
Then, the process proceeds to 4, and the muffling process is performed. On the other hand, if it is determined that the gate time is not “00H”, step S10
The process branches to 5, and the same processing as described above is performed.

Returning to the explanation of the concert magic performance process (FIG. 7). Automatic performance gate off process (step S67)
When is finished, it is then checked whether or not the content of the off counter is zero (step S68). And
If it is determined that it is not zero, the contents of the off counter are decremented (step S69). On the other hand, if it is determined to be zero, the process of step S69 is skipped. The off counter is set in the concert magic main process described later. Next, the content of the read timing counter is decremented (step S70). Then, it returns to step S66 and repeats the same processing. Normally, the content of the read timing counter is only "+1", but if any of the processing takes a lot of time and the content of the read timing counter becomes "+2" or more, steps S66- are executed. S
70 is repeated a plurality of times. As a result, the time until the gate time becomes zero is controlled to be the time specified by the gate time data.

As described above, by the processing of steps S66 to S70, the sound whose sound is started is sounded only for the time corresponding to the gate time in the note data that is the source of the sound, and is then muted. The function is realized. Therefore, even if the performer stops the operation of advancing the automatic performance in the middle of the music, the sound does not continue to sound. Also, even if all keys are released, the sound that is already sounding will not be muted immediately at the time when it was released, so there is a problem that the sound will be interrupted and smooth performance will not be possible as in the past. Is eliminated.

On the other hand, if it is determined in step S65 that the data read request flag is "1",
It is recognized that a key has been pressed, and sound generation processing based on the note data is performed (steps S71 to S75). The second control means of the present invention is realized by the processing of steps S71 to S75.

In this process, it is first checked whether the off counter is zero (step S71). When it is determined that the value is not zero, the automatic performance gate off process is performed (step S72). This process is the same as the process performed in step S67 described above. This decrements the gate time of the note that is already being sounded. Next, the content of the off counter is decremented (step S73), and then the process returns to step S71.
Hereinafter, step S until the content of the off counter becomes zero
The processing from 71 to S73 is repeated. By repeating this, when the key is pressed earlier than the original sound timing,
The gate time that is pushed early will be decremented at high speed.

When it is determined in step S71 that the off counter has reached zero, the concert magic main process is performed (step S74). This concert magic main process is a process of reading out one note data from the automatic performance data memory 18 and generating it. Here, for the details of the concert magic main processing,
This will be described with reference to the flowcharts of FIGS. 8 and 9.

In the concert magic main process, it is first checked whether or not the CM mode is set (step S80). If it is determined that the CM mode is not set, the routine returns from this concert magic main processing routine to the concert magic performance processing routine. That is, when the mode is not the CM mode, the tone generation process based on the automatic performance data is not performed even if the key is pressed.

When it is determined in step S80 that the mode is the CM mode, it is then checked whether or not the steps match (step S81). That is, it is checked whether or not the step time data in the note data designated by the read address set in the address register matches the contents of the step time counter. If it is determined that they do not match, the content of the step time counter is incremented (step S82),
Then, the routine returns from the concert magic main processing routine to return to the concert magic performance processing routine. Then, in the concert magic performance processing routine, it is checked whether or not the data read request flag is "1" (step S75). If it is "1", the process returns to step S74 and the same processing is repeated. Repeat the above (steps S74 → S80 → S81 → S8
2 → S75 → S74 → ...), the contents of the step time counter are forcibly incremented. The above-mentioned repetitive processing is performed at the processing speed of the CPU 10 regardless of the check timing or the sound generation timing. When it is determined in step S81 that the step time in the note data designated by the read address set in the address register matches the content of the step time counter, the note data is read (step S83).

Next, it is checked whether the read note data is note data (step S8).
4). This is performed, for example, by checking the MSB of the first byte (key number) of the note data. If it is determined that the data is not note data, system processing is performed (step S85). In this system processing, for example, processing such as tone color change and effect change is performed.

When it is determined in step S84 that the data is note data, it is then checked whether or not the part number is "7" (step S86). This is done, for example, by referring to the lower 3 bits of the 4th byte of the note data. Here, the part number “7” is the part assigned to the drum channel. When it is determined that the part number is "7", the drum channel setting process is performed (step S87). This process is a process of changing the part number “7” to “10” in order to match the part number in the note data with the part number of the drum channel defined by the sound source 20. Step S86
If it is determined that the part number is not "7", step S87 is skipped.

Next, velocity set and split processing is performed (step S88). In the velocity set process, step S33 of the key depression event process routine.
Then, the velocity saved in a predetermined buffer area of the work memory 13 is sent to the tone generator 20. Also, in the split processing, based on the key data that is also saved, it is checked whether the key number of the pressed key belongs to the normal playing key range or the concert magic key range, and the concert magic key range is determined. , The tone color parameter corresponding to the note data is sent to the sound source 20 in order to make a sound based on the note data. On the other hand, when the key number of the pressed key belongs to the normal playing key range, the tone generation processing is not performed.

Next, a tone generation process is performed based on the tone color parameter and velocity set in step S88 (step S89). The content of this pronunciation process is
This is the same as the content performed in step S39 of the key depression event processing. Then, the data read request flag is cleared (step S90). Then, the read address of the next note data is set in the address register (step S91).

Then, it is checked whether the steps match (step S92). That is, it is checked whether or not the step time data in the next note data matches the contents of the step time counter. If it is determined that they match, the process returns to step S80, and the same processing is repeated thereafter. As a result, when there are a plurality of note data having the same step time, sound generation based on all the note data is performed at the same time.

On the other hand, if it is determined in step S92 that the steps do not match, a calculation process of the step value to be set in the off counter is performed (step S93).
~ S97). The step value calculation means of the present invention is realized by the processing of steps S93 to S97.

In this step value calculation process, the contents of the step time counter are first saved (step S
93). The contents of the step time counter can be saved in the save area of the work memory 13, for example. Then, it is checked whether or not the steps match (step S94), and if they do not match, the content of the step time counter is incremented (step S95),
Next, the content of the off counter is incremented (step S96). Then, the process returns to step S94, and steps S94 to S96 are repeated until the steps match. Then, if it is determined in step S94 that the steps match, the contents of the step time counter saved in step S93 are restored (step S97), and then the process returns to step S80 to repeat the same processing. As a result, the step value until the next sound generation is set in the off counter.

Since the off counter is used only when the automatic performance is not being performed, the steps S92 to S97 are not performed when the automatic performance is being performed, and the process returns to the step S80 when the process of the step S91 is completed. You may comprise.

When the above concert magic main processing is completed, step S7 of the concert magic performance processing is performed.
Returning to step 5, it is checked whether the data read request flag is "1". When it is determined that the value is "1", the process returns to step S74 and the concert magic main process is executed again. This is a sequence when the data previously processed by the concert magic main processing routine is not the note data (the data read request flag is not cleared). As a result, the function of ensuring that one sound is always produced by pressing the key once is secured. When it is determined in step S75 that the data read request flag is "0", the routine returns from the concert magic performance processing routine and returns to the main routine.

In the embodiment described above, the keyboard device 1
Although the automatic performance can be advanced by pressing any one of the keys 7, the automatic performance can be advanced by a predetermined switch, a foot switch, or the like on the operation panel 15 without being limited to the key. good.

[0098]

As described in detail above, according to the present invention,
Even if the performer stops the operation of advancing the automatic performance in the middle of the song, no sound continues to be produced, and even if only one key is used, a smooth automatic performance device and an automatic performance device are provided. Can provide a playing method.

[Brief description of drawings]

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

FIG. 2 is a flowchart showing a main process used in the embodiment of the present invention.

FIG. 3 is a flowchart showing a timer interrupt process used in the embodiment of the present invention.

FIG. 4 is a flowchart showing key depression event processing used in an embodiment of the present invention.

FIG. 5 is a flowchart showing tempo data set processing used in an embodiment of the present invention.

FIG. 6 is a flowchart showing key release event processing used in an embodiment of the present invention.

FIG. 7 is a flowchart showing a concert magic performance process used in the embodiment of the present invention.

FIG. 8 is a flowchart showing a concert magic main process (No. 1) used in the embodiment of the present invention.

FIG. 9 is a flowchart showing a concert magic main process (No. 2) used in the embodiment of the present invention.

FIG. 10 is a flowchart showing an automatic performance gate-off process used in the embodiment of the present invention.

FIG. 11 is a diagram showing a structure of note data used in the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 CPU 10a Timer 11 External interface circuit 12 Program memory 13 Work memory 14 Panel interface circuit 15 Operation panel 16 Keyboard interface circuit 17 Keyboard device 18 Automatic performance data memory 19 Waveform memory 20 Sound source 21 D / A converter 22 Amplifier 23 Speaker

Claims (4)

[Claims] 1. Storage means for storing a plurality of musical note data containing at least data representing a step time defining a tone generation timing and data representing a gate time defining a note length, and detecting that a key is pressed. Each time the key-depression detecting means detects that a key has been pressed, note data is read from the storage means, and a sound is generated based on the read note data. An automatic performance device for advancing an automatic performance by starting a step of calculating a step value from a step time of a sound to be sounded this time to a step time of a sound to be sounded next time at the start of sounding. When a key depression is not detected by the value calculation means and the key depression detection means, the step value and the gate time corresponding to the sound being sounded are time intervals proportional to the tempo, respectively. Decrement with the first control means for muting the sound when the gate time becomes zero, and a step corresponding to the sound being sounded at the time when the key is detected by the key detecting means. Second control means for decrementing the value and the gate time until the step value becomes zero, and then starting the sounding of the next sound, and muting the sound being sounded when the gate time becomes zero by the decrementing An automatic performance device characterized by being equipped with. 2. A tempo detection means for detecting a tempo based on a key depression interval detected by the key depression detection means is further provided, and the time interval proportional to the tempo is equal to the tempo detected by the tempo detection means. The automatic performance device according to claim 1, wherein the automatic performance device is defined based on the above. 3. Each time it is detected that a key has been pressed,
To read out the note data containing at least the stored data representing the step time defining the sounding timing and the data representing the gate time defining the note length, and starting the sound generation based on the read note data. Is an automatic performance method that advances the automatic performance by calculating the step value from the step time of the sound to be sounded this time to the step time of the sound to be sounded next at the start of sounding, and pressing the key If it is not detected, the step value and gate time corresponding to the sound being sounded are decremented at time intervals proportional to the tempo respectively, and when the gate time becomes zero, the sound is muted, and a key depression is detected. In addition, the step value and gate time corresponding to the sound being generated at the time of detection are respectively decremented until the step value becomes zero. Automatic performance method, characterized in that to start the pronunciation of the next sound after the placement, the gate time by the decrement to mute the sound in emitting sound Once it becomes a zero. 4. The automatic performance method according to claim 3, wherein the time interval proportional to the tempo is determined based on the tempo detected based on the key pressing interval.