JP2002333880A - Electronic musical instrument, sound production processing method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give instruction for the tempo of sub-part data by operating play operating elements. SOLUTION: This electronic musical instrument has a memory means (109) for storing main part data (109a) and sub-part data (109b), composed of one or plural parts, the playing control elements (102) for sound instructing by a player, means for successively reading the one or plural main part data out of the memory means, every time a sound production instruction is made by the playing control elements and subjecting the data to sound production processing; a means for determining the playing tempo of a player according to the timing of the sound production instruction, with the timing of the sound production instruction prior to the same and the timing of the main part data read out of the memory means according to the sound production instruction; and a means for reading out the sub-part data stored in the memory means at the decided tempo and subjecting the data to sound production processing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for sequentially reading out main part data by a predetermined amount each time automatic performance data prepared in advance is instructed by a performance operator to generate a sound.

[0002]

2. Description of the Related Art Conventionally, in an electronic musical instrument, melody part data (main part data) for semi-automatic performance is stored in a memory, and the melody part data is read out at a timing designated by a keyboard to generate a musical tone. By doing so, semi-automatic performance was progressing. At this time, the accompaniment part data (subpart data) is automatically accompanied at a preset tempo.

[0003]

However, in the conventional electronic musical instrument, the accompaniment part data is restricted to a preset tempo, so that the accompaniment part data cannot be automatically accompanied at a desired tempo of the player. Was.

It is an object of the present invention to enable the tempo of subpart data to be designated by operating a performance operator.

[0005]

According to one aspect of the present invention, storage for storing main part data composed of one or more parts and subpart data composed of one or more parts. Means, a performance operator for the player to instruct sounding, and a main part sounding unit for sequentially reading out one or a plurality of main part data from the storage means each time sounding is instructed by the performance operator. Processing means; and tempo determining means for determining a performance tempo of the player according to the timing of the sounding instruction and the timing of the preceding sounding instruction, and the timing of the main part data read from the storage means in accordance with the sounding instruction. Reading the subpart data stored in the storage means at the tempo determined by the tempo determination means, Electronic musical instrument and a subpart sound processing means for are provided.

According to another aspect of the present invention, storage means is provided for storing main part data composed of one or more parts and subpart data composed of one or more parts. A preparatory step, and each time a sounding instruction is given by the performance operator,
Main part sound processing step of reading out one or a plurality of main part data and performing sound processing, the timing of the sound generation instruction and the timing of the previous sound generation instruction, and the main part data read from the storage means in response to the sound generation instruction And a subpart sound processing step of reading subpart data stored in the storage means at the determined tempo and performing sound processing. Is provided.

[0007] According to still another aspect of the present invention, there is provided storage means for storing main part data composed of one or more parts and subpart data composed of one or more parts. A main part sounding procedure for sequentially reading out one or a plurality of main part data from the storage means each time sounding is instructed by the performance operator, and performing sounding processing; A tempo determining step of determining a performance tempo of the player according to the timing of the sounding instruction and the timing of the main part data read from the storage means in response to the sounding instruction; and storing the determined tempo in the storage means. A sub-part sound processing procedure for reading out the sub-part data and executing the sound processing. Program for is provided.

According to the present invention, the tempo of the subpart data can be instructed in real time by operating the performance operator, so that the sound processing of the subpart data can be performed at the tempo desired by the player.

[0009]

FIG. 1 shows the configuration of an electronic musical instrument according to a first embodiment of the present invention. The bus 101 includes a key switch circuit 103, a panel switch circuit 105, a display device 106, an external storage device 107,
AM 108, ROM 109, CPU 110 and sound source 11
3 is connected. The CPU 110 can control other components via the bus 101 according to a computer program in the ROM 109.

The keyboard (performance operator) 102 has a plurality of white keys and black keys. When the performer presses or releases the keyboard 102, the key switch circuit 103 detects a keyboard on event (sound generation instruction event) or a keyboard off event (mute instruction event). The key-on event includes pitch and velocity information. The velocity information indicates a key pressing speed.

The operation panel 104 has various switches, for example, a switch for designating a manual performance mode or a semi-automatic performance mode. The panel switch circuit 105 detects a switch event when a player operates a switch on the operation panel 104.

The display device 106 is a liquid crystal display (LCD)
And a light emitting diode (LED), and can display various information. The external storage device 107 is a floppy disk, a CD-ROM, or the like, and can store various information.

The RAM 108 has a work area for the CPU 110 and stores various information. ROM 109 is
Melody part data (main part data) 109a
And automatic accompaniment part data (subpart data) 109
b is stored. The melody part data 109a and the automatic accompaniment part data 109b may be stored separately or mixedly, and each part may be one or more parts (channels or tracks).
It consists of. The melody part data 109a and the automatic accompaniment part data 109b are stored in the external storage device 10
7, and the MIDI input / output means 112 may input the data as MIDI data from an external device and supply the data to the CPU 110.

The CPU 110 has a timer 111, and the timer 111 supplies time information to the CPU 110. In the automatic accompaniment part data 109b, the sounding timing and the like are controlled according to the time information of the timer 111.

The performance modes include a manual performance mode and a semi-automatic performance mode. First, the manual performance mode will be described. When the player performs a performance operation on the keyboard 102, the CPU 110 supplies musical tone parameters (keyboard on event or the like) according to the operation to the sound source 113. Upon receiving the keyboard ON event (including the pitch and velocity), the sound source 113 reads out the tone waveform from the waveform memory 114 and generates a tone signal at a volume corresponding to the pitch and velocity during the keyboard ON event. The D / A converter 115
Converts a tone signal from a digital format to an analog format.
The amplifier 116 amplifies the analog tone signal and causes the speaker 117 to emit a tone.

Next, the semi-automatic performance mode will be described. The CPU 110 sequentially reads one or a plurality of melody part data 109a from the ROM 109 every time the player presses the keyboard 102, and causes the sound source 113 to perform sound generation processing. Upon receiving the keyboard-on event (including the pitch and velocity), the sound source 113 ignores the pitch during the keyboard-on event and generates a tone signal at a volume corresponding to the velocity during the keyboard-on event to generate a tone. Specifically, the player uses the keyboard 102 to play the melody part data 10.
If only the sounding timing and velocity of each note 9a are indicated, the melody part data 109a is read out and sounded at the pitch indicated by the melody part data 109a. Since the melody part data 109a for a plurality of music pieces is stored in the ROM 109, the player can easily perform the music by simply designating the sounding timing and velocity of each note without having to remember the notes of the music piece. be able to.

The above melody part data 109
Automatic accompaniment part data 109b
Is performed automatically. Automatic accompaniment part data 10
9b is read basically irrespective of the operation on the keyboard 102 and supplied to the sound source 113. The sound source 113 performs a sound generation process of the automatic accompaniment part data 109b.

In the normal automatic accompaniment process, a tone generation process is performed according to the tempo in the automatic accompaniment part data 109b. However, in this case, the automatic accompaniment part data 109b is restricted by the preset tempo, so that the automatic accompaniment part data 109b cannot be automatically accompanied at the tempo desired by the player. In other words, the performer can instruct only the tempo (sound generation timing) of the melody part data 109a and cannot instruct the tempo of the automatic accompaniment part data 109b, so that the tempo of each part may be shifted.

In this embodiment, when the sounding timing and velocity of the melody part data 109a are instructed by operating the keyboard 102, the tempo of the automatic accompaniment part data 109b is controlled in accordance with the sounding timing. Specifically, the performance tempo of the player is determined based on the key press interval of the player, and the automatic accompaniment part data 109b is automatically accompanied at that tempo. Thus, the player can control not only the tempo (sound generation timing) of the melody part data 109a but also the tempo of the automatic accompaniment part data 109b by the key pressing operation of the keyboard 102. Also,
Since the tempos of the respective parts match, synchronized performance of the respective parts becomes possible.

FIG. 2 is a flowchart showing the processing of the main routine of the electronic musical instrument. When the power of the electronic musical instrument is turned on, the following processing starts.

In step S201, the CPU 110 is initialized. For example, each port of the CPU 110 is set. In step S202, the RAM 108 is initialized. For example, setting of a tone color in the RAM 108 is performed.
In step S203, initialization of the timer 111 and the like is performed.

In step S204, a keyboard event generated by operating the keyboard 102 is processed. Details of this processing will be described later with reference to FIG. Step S
At 205, automatic accompaniment processing of the automatic accompaniment part data 109b is performed. This automatic accompaniment process is as described above. In step S206, processing of a switch event generated by operating the operation panel 104 is performed. For example,
Switching between a manual performance mode and a semi-automatic performance mode according to a switch event. In the switch S207, a MIDI process is performed. The MIDI process is a process in which the MIDI input / output unit 112 inputs and outputs MIDI data to and from an external device. Thereafter, the process returns to step S204, and the above processing is repeated.

FIG. 3 is a flowchart showing details of the keyboard event process in step S204 of FIG. In step S301, an event detection process is performed. The event detection process detects a key-on event or a key-off event when the keyboard 102 is pressed or released. In step S302, it is checked whether a keyboard event has been detected. If detected, the process proceeds to step S303. If not detected, the process returns to the process in FIG.

In step S303, it is checked whether the detected keyboard event is a keyboard on event or a keyboard off event. If it is a keyboard on event, the process proceeds to step S304. If it is a keyboard off event, the process proceeds to step S305.

In step S304, a keyboard ON event process is performed. The keyboard on-event processing is for performing sound generation processing, the details of which will be described later with reference to FIG. Thereafter, the process returns to the process of FIG.

In step S305, a keyboard off event process is performed. The keyboard off event process performs a process of silencing a musical tone being sounded. Thereafter, the process returns to the process of FIG.

FIG. 4 is a flowchart showing details of the keyboard ON event process in step S304 of FIG. In step S401, it is checked whether the performance mode is the semi-automatic performance mode or the manual performance mode. If the mode is the semi-automatic performance mode, the process proceeds to step S402; if the mode is the manual performance mode, the process proceeds to step S403.

In step S402, a semi-automatic performance keyboard ON event process is performed. Details of this processing will be described later with reference to FIG. Then, the process returns to the process of FIG.

In step S403, keyboard sound generation processing is performed. Specifically, in accordance with the operation of the keyboard 102, the sound generation process is performed at a volume according to the pitch in the keyboard-on event and the velocity in the keyboard-on event. Then, the process returns to the process of FIG.

FIG. 5 is a flowchart showing the details of the semi-automatic performance keyboard ON event process of step S402 in FIG. In step S501, tempo detection and change processing of the automatic accompaniment part data 109b is performed. This process is a process of determining the tempo of the automatic accompaniment part data 109b according to the key press interval of the keyboard 102, the details of which will be described later with reference to FIG.

In step S502, one or more melody part data 109a is read from the ROM 109. That is, the melody part data 109a within a predetermined time is read from the ROM 109. Since a chord is composed of a plurality of note data at approximately the same time, when a plurality of note data exist within a predetermined time, they are read out collectively. When it is not a chord but a single tone, one melody part data 109a is read.

In step S503, the read melody part data 109a is processed. When the data is a key-on event (key-on event),
The velocity in the event is changed to the velocity according to the above-mentioned keyboard operation, and the sound is processed. That is, the sounding timing and velocity (volume) of each note are designated by keyboard operation. The pitch is the melody part data 10
9a is designated.

In step S504, the next read address of the melody part data 109a is set.
Return to the processing of.

FIG. 6 is a flowchart showing details of the tempo detection and change processing of the automatic accompaniment part in step S501 in FIG. In step S601, the value of the tempo detection counter cg_time_ctr is read. The tempo detection counter cg_time_ctr is
It is read and reset to 0 each time the key 2 is pressed. After that, the tempo detection counter cg_
The time information in time_ctr is incremented. That is, the tempo detection counter cg_time_
ctr is reset to 0 by the previous key press and is read out by the current key press.
Is stored.

In step 602, the melody part data 109a is read from the ROM 109. At this time, RO
From M109, a set of delta time and event data is read. Delta time is the time interval (relative time) between the previous event data and the current event data
Is shown. When the delta time is represented by the absolute time of the event data, the time interval between the previous event data and the current event data is obtained and set as the delta time. That is, the delta time corresponds to the original key press interval of the melody part data 109a.

In step S603, the above delta time is stored in a time measurement counter d_time_ctr.

In step S604, a tempo detection counter cg_time_ctr and a time measurement counter d_t
It is compared with im_ctr to check whether the difference between them is within a set value. That is, it is checked whether the key press interval of the performer is substantially the same as the key press interval of the melody part data. If the difference between them is within the set value,
Since the performance tempo of the player substantially matches the original tempo of the melody part data 109a, there is no need to change the tempo, and the process returns to the processing in FIG. On the other hand, if the difference between the two is greater than the set value, the performance tempo of the performer is shifted from the original tempo of the melody part data 109a.
Proceed to step S605.

In step S605, the performance tempo TEMPO1 of the player is calculated. Tempo detection counter cg
_Time_ctr indicates a key press interval of the player, and T1 indicates a key press interval indicated by the melody part data 109a indicated by the time measurement counter d_time_ctr.
The tempo indicated by the melody part data 109a is TEMP
O2. The performance tempo TEMPO1 of the player is calculated by the following equation.

TEMPO1 = TEMPO2 × T1 / T2

In step S606, the average of a plurality of tempos TEMPO1 calculated in the past is calculated, and the tempo T
Determine the EMPO. At this time, regardless of whether or not the difference between the two is within the set value in step S604, the tempo TEMPO1 is calculated every time the key is pressed, and the average thereof is calculated to determine the tempo TEMPO1.
Preferably, the EMPO is determined. By averaging a plurality of past tempos, the tempo can be determined in consideration of not only the current key press timing and the previous key press timing but also the previous key press timing.

In step S607, the tempo of the automatic accompaniment part data 109b is changed to the above tempo TEMPO. Specifically, the tempo TEMPO for all parts (channels or tracks) constituting the automatic accompaniment part data 109b is supplied to the sound source 113. afterwards,
In the automatic accompaniment processing of step S205 in FIG. 2, the automatic accompaniment processing of the automatic accompaniment part data 109b is performed at the set tempo TEMPO.

Each musical note of the melody part data 109a is instructed by a key depression of the keyboard 109a at a sound generation timing. The automatic accompaniment part data 109b
The tempo is determined according to the key pressing interval of a. That is,
The tempo of both the melody part data 109a and the automatic accompaniment part data 109b is determined by the operation of depressing the keyboard 109a, so that the tempos of the respective parts match and the synchronized performance of the parts becomes possible.

As described above, according to the present embodiment, the melody part data 1
In addition to instructing the tempo of 09a, the tempo of the automatic accompaniment part data 109b can be instructed.
Thereby, the tempos of the melody part data 109a and the automatic accompaniment part data 109b can be matched.

(Second Embodiment) An electronic musical instrument according to a second embodiment of the present invention is the same as that shown in FIGS. In the second embodiment, a player can select a desired part as either melody part data or automatic accompaniment part data.

FIG. 7 is a flowchart showing details of the panel switch processing in step S206 of FIG. In step S701, it is checked whether there is a switch-on event generated by pressing a switch in the operation panel 104. If there is a switch-on event, the process proceeds to step S702; otherwise, the process proceeds to step S703.

In step S702, switch-on event processing is performed. Details of this processing will be described later with reference to FIG. Thereafter, the process returns to the process of FIG.

In step S703, the operation panel 104
Check if there is a switch-off event that occurs when the switch inside is released. If there is a switch off event, the process proceeds to step S704, and if there is no switch off event, the process returns to the process in FIG.

In step S704, a process corresponding to the switch off event is performed. Thereafter, the process returns to the process of FIG.

FIG. 8 is a flowchart showing details of the switch-on event processing in step S702 in FIG. In step S801, it is checked whether the automatic accompaniment part is set. If the automatic accompaniment part is set, the process proceeds to step S802. If the automatic accompaniment part is not set, the process proceeds to step S806. At the initial stage, since the automatic accompaniment part is not set, the process proceeds to step S806.

In step S806, the operation panel 104
By pressing the automatic accompaniment part setting switch in the above, it is checked whether or not the ON event has occurred. If an ON event has occurred, the process proceeds to step S807. If an ON event has not occurred, the process proceeds to step S808.

In step S807, the automatic accompaniment part setting state is set, and the performance data of a plurality of parts can be selected as either melody part data or automatic accompaniment part data. After that, the process returns to the process of FIG.

In step S808, other switch-on events are processed. After that, the process returns to the process of FIG.

Next, when the part setting switch in the operation panel 104 is pressed, it is determined through step S801 that a part selection switch-on event has occurred in step S802, and the flow advances to step S803.

In step S803, the automatic accompaniment part data and the melody part data are inverted. That is, if the part setting switch is pressed when the predetermined part is the automatic accompaniment part data, that part is set as the melody part data. Conversely, if the part setting switch is pressed when the predetermined part is the melody part data, that part is set as the automatic accompaniment part data.
Thereby, the player can set a plurality of parts as melody part data or automatic accompaniment part data for each part.

Thereafter, when an automatic accompaniment part setting release switch in the operation panel 104 is pressed, an automatic accompaniment part setting release switch-on event occurs. Then, the process proceeds to step S804 via steps S801 and S802. In step S804, if an automatic accompaniment part setting release switch-on event has occurred, the process proceeds to step S805.
If not, the process returns to the process of FIG. In step S805, automatic accompaniment part setting release processing is performed.
After that, the process returns to the process of FIG.

FIG. 9 is a flowchart showing details of the semi-automatic performance keyboard ON event process of step S402 in FIG. In step S901, automatic accompaniment part tempo detection and change processing are performed. This processing is the same as the processing in FIG.

In step S902, music data (performance data) in which melody part data and automatic accompaniment part data are mixed is read from the ROM 109.

In step S903, it is checked whether the read music data is automatic accompaniment part data or melody part data. The automatic accompaniment part data or the melody part data can be identified based on the channel or track number indicating the part. If it is an automatic accompaniment part, the process proceeds to step S904; if it is melody part data, the process proceeds to step S905.

In step S904, the next read address of the music data is set. Then, step S90
Proceed to 2 and repeat the above processing. That is, the music data is continuously read until the melody part data is read. When the melody part data is read, the process proceeds to step S905.

In step S905, the read melody part data is processed. If the data is a key-on event (key-on event), the velocity in the event is changed to a velocity corresponding to the above-mentioned keyboard operation, and sound generation processing is performed. That is, the sounding timing and velocity (volume) of each note are designated by keyboard operation. The pitch of the melody part data is specified.

Next, in step S906, the next read address is set, and the flow returns to the processing in FIG.

FIG. 10 is a flowchart showing the details of the automatic accompaniment processing in step S205 in FIG. In step S1001, it is checked whether a semi-automatic performance is being performed. Next, in step S1002, music data in which the melody part data and the automatic accompaniment part data are mixed is read from the ROM 109. At this time, the ROM 109
Read the set of delta time and event data from.

Next, in step S1003, it is checked whether the read music data is an automatic accompaniment part or a melody part. If it is the automatic accompaniment part data, the process proceeds to step S1004, and if it is the melody part data, the process proceeds to step S1006.

In step S1004, it is checked whether or not the execution time of the event data has elapsed based on the read delta time. If the execution time has elapsed, the process proceeds to step S1005, and if the execution time has not elapsed, the process returns to the processing in FIG.

In step S1005, processing of the event data of the read automatic accompaniment part data is performed. If the data is a key-on event (key-on event), the automatic accompaniment data is sounded at the tempo set in the process of FIG. That is, the tempo of the automatic accompaniment part data is specified by the key pressing interval of the keyboard 102. The pitch, velocity, etc. are specified in the automatic accompaniment part data.

Next, in step S1006, the next read address is set, and the process returns to the processing in FIG.

According to the present embodiment, the player can select the melody part data and the automatic accompaniment part data. Further, even if the melody part data and the automatic accompaniment part data are stored in a mixed manner, it is possible to identify those parts and perform a process corresponding to each part. The melody part data is played semi-automatically, and the automatic accompaniment part data is played automatically.

Although the melody part data has been described as an example of the main part data and the automatic accompaniment part data has been described as an example of the subpart data, the performer can select a desired part as the main part data or the subpart data.

The first and second embodiments can be realized by a computer executing a program. Also, means for supplying the program to a computer, for example, a CD-RO recording the program
A recording medium such as M or a transmission medium such as the Internet for transmitting such a program can also be applied as an embodiment of the present invention. The above-described program, recording medium, and transmission medium are included in the scope of the present invention.

It should be noted that each of the above-described embodiments is merely an example of a concrete example for carrying out the present invention, and the technical scope of the present invention should not be interpreted in a limited manner. It is. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features.

[0071]

As described above, according to the present invention, the tempo of the subpart data can be instructed in real time by operating the performance operator, so that the sound processing of the subpart data is performed at the desired tempo of the player. be able to.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an electronic musical instrument according to first and second embodiments of the present invention.

FIG. 2 is a flowchart showing processing of a main routine of the electronic musical instrument.

FIG. 3 is a flowchart showing keyboard event processing.

FIG. 4 is a flowchart showing a keyboard on event process.

FIG. 5 is a flowchart showing a semi-automatic performance keyboard ON event process.

FIG. 6 is a flowchart showing automatic accompaniment part tempo detection and change processing.

FIG. 7 is a flowchart illustrating a panel switch process.

FIG. 8 is a flowchart showing a switch-on event process.

FIG. 9 is a flowchart showing another semi-automatic performance keyboard ON event process.

FIG. 10 is a flowchart showing an automatic accompaniment process.

[Explanation of symbols]

 101 bus 102 keyboard 103 key switch circuit 104 operation panel 105 panel switch circuit 106 display device 107 external storage device 108 RAM 109 ROM 109a melody part data 109b automatic accompaniment part data 110 CPU 111 timer 112 MIDI input / output means 113 sound source 114 waveform memory 115 D / A converter 116 Amplifier 117 Speaker

Continuing on the front page (72) Inventor Tokutoku Matsuda 200 Terashimacho, Hamamatsu-shi, Shizuoka Prefecture, Japan Kawagoki Seisakusho Co., Ltd. (Reference) 5D378 HA03 MM48 MM65 XX25

Claims (11)

[Claims] 1. A storage means for storing main part data composed of one or a plurality of parts and subpart data composed of one or a plurality of parts, and a performance for a player to give a sounding instruction. An operator; main part sound processing means for sequentially reading one or a plurality of main part data from the storage means each time sounding is instructed by the performance manipulator and performing sound processing; A tempo determining means for determining a performance tempo of the player according to the timing of the sounding instruction and the timing of the main part data read from the storage means in response to the sounding instruction; Sub-part sound processing means for reading out the sub-part data stored in the storage means and performing sound processing. Electronic musical instruments. 2. The tempo determination means determines a performance tempo of a player in consideration of not only the timing of the sounding instruction and the timing of the sounding instruction before but also the sounding instruction before. Electronic musical instrument according to 1. 3. The electronic musical instrument according to claim 1, further comprising a part designating means for designating data of a main part and sub-parts out of performance data of a plurality of parts. 4. The electronic musical instrument according to claim 1, wherein the main part data is melody part data, and the subpart data is accompaniment part data. 5. The electronic musical instrument according to claim 1, wherein the performance operator is a keyboard. 6. The performance operator can issue a sounding instruction including velocity information, and the main part sounding processing means performs sounding processing at a volume corresponding to the velocity information each time a sounding instruction is issued by the performance operator. The electronic musical instrument according to claim 1. 7. The tempo determining means determines a first sounding instruction interval, which is a difference between the timing of the sounding instruction and the timing of a sounding instruction preceding the timing, and the storage means according to the sounding instruction. Means for acquiring a second sounding instruction interval which is a sounding instruction interval of main part data read out from the main part data, and a performance tempo of a player based on a ratio between the first sounding instruction interval and the second sounding instruction interval. The electronic musical instrument according to claim 1, wherein the electronic musical instrument is determined. 8. The player's tempo determination means, based on a value obtained by multiplying a ratio between the first and second sounding instruction intervals by a tempo of main part data stored in the storage means. 8. The electronic musical instrument according to claim 7, wherein a performance tempo is determined. 9. The electronic musical instrument according to claim 1, wherein said main part sound processing means sequentially reads out main part data within a predetermined time from said storage means every time sounding is instructed by said performance operator, and performs sound processing. 10. A preparation step for preparing storage means for storing main part data composed of one or a plurality of parts and subpart data composed of one or a plurality of parts; A main part sound processing step of sequentially reading one or a plurality of main part data from the storage means each time a sound instruction is issued, and performing sound processing; timing of the sound instruction and timing of the sound instruction before the main part; Determining a playing tempo of the player according to the timing of the main part data read from the storage means in response to the sub-part data stored in the storage means at the determined tempo A sub-part sound processing step for processing. 11. A preparation procedure for preparing storage means storing main part data composed of one or a plurality of parts and subpart data composed of one or a plurality of parts; A main part sound processing procedure for sequentially reading out one or a plurality of main part data from the storage means each time a sound instruction is issued, and performing a sound processing; A tempo determining step of determining the performance tempo of the player according to the timing of the main part data read from the storage means in response to the sub-part data stored in the storage means at the determined tempo A program for causing a computer to execute a subpart sound processing procedure to be processed.