JP7130185B2 - Electronic musical instrument, electronic musical instrument control method and control program - Google Patents

Description

The present invention relates to an electronic musical instrument, an electronic musical instrument control method, and a control program.

In recent years, electronic musical instruments and personal computers have adopted musical tone generation methods that use a wide variety of sound source data (waveform data) in order to reproduce musical tones that are closer to the characteristics of the original sounds of wind and stringed instruments. For example, in a software sound source that runs on an electronic musical instrument or a personal computer, the waveform data that is the sound source is stored in an auxiliary storage device with slow access speed and large storage capacity (low speed and large capacity) such as flash memory or hard disk. , a system is known in which only waveform data used for sound generation is transferred to a waveform memory having a high access speed and a small storage capacity (high speed and small capacity) for reproduction. A tone generator that employs such a system is described, for example, in Japanese Unexamined Patent Application Publication No. 2002-100000.

JP-A-11-7281

However, the above-described tone generation method has the problem that it takes time to transfer waveform data from the low-speed, large-capacity auxiliary storage device to the high-speed, low-capacity waveform memory. In particular, for tones that require waveform data with a large data size, or for tones that combine multiple waveform data, the transfer time will be even longer, making it impossible to play the musical tone, which will hinder the performance. there was a case.

SUMMARY OF THE INVENTION Accordingly, the present invention provides an electronic musical instrument, a control method for the electronic musical instrument, and a control program that can shorten the time required for musical tone generation processing and perform performance with excellent response (response characteristics) during performance. With the goal.

An electronic musical instrument according to one aspect of the present invention includes
a tone color selection process for selecting the first tone color from among a plurality of tone colors including at least a first tone color and a second tone color specified by performance data reproduced by automatic performance ;
first waveform data for transferring a plurality of first waveform data corresponding to the first timbre selected by the timbre selection process from the first storage means to a timbre waveform buffer in the second storage means according to the selection; a transfer process;
second waveform data corresponding to the second timbre designated by the performance data is transferred from the first storage means to the waveform generating device to which oscillation is assigned in the second storage means in accordance with the reproduction; a second waveform data transfer process for transferring to the waveform buffer;
A musical tone corresponding to the first timbre is generated by the sound generator based on the plurality of first waveform data stored in the timbre waveform buffer, and a musical tone corresponding to the second timbre is generated by the waveform generator. a sounding process for causing the sounding unit to sound based on the second waveform data stored in the waveform buffer;
Either one of the plurality of first waveform data and the second waveform data to be sounded by the sound generation processing is stored in the second storage during the transfer of the plurality of first waveform data by the first waveform data transfer processing. a judgment process for judging whether or not stored in the means;
When it is determined by the determination process that the plurality of first waveform data are not stored in the second storage means, the transfer of the plurality of first waveform data by the first waveform data transfer process is interrupted, and sound is generated by the sound generation process. a transfer control process for preferentially transferring waveform data from the first storage means to the second storage means;
to run.

According to the present invention, it is possible to shorten the time required for processing to generate musical tones, and perform performance with excellent response during performance.

1 is an external view showing an embodiment of an electronic musical instrument according to the present invention; FIG. FIG. 2 is a diagram for explaining an example of specifications of a sound source applied to an electronic musical instrument according to an embodiment; FIG. 2 is a block diagram showing a configuration example of hardware applied to the electronic musical instrument according to one embodiment; FIG. 2 is a block diagram showing an example of the internal structure of a tone generator LSI applied to the electronic musical instrument according to one embodiment; FIG. FIG. 4 is a diagram illustrating a waveform data management method (part 1) applied to an embodiment; FIG. 10 is a diagram illustrating a waveform data management technique (part 2) applied to one embodiment; FIG. 2 is a diagram explaining an outline of information on a RAM and a flash memory and transfer processing thereof applied to one embodiment; It is a figure explaining the waveform area|region of RAM applied to one embodiment. 4 is a flow chart showing a main routine of a control method for an electronic musical instrument according to one embodiment; 5 is a flow chart showing initialization processing applied to the control method of the electronic musical instrument according to one embodiment. 4 is a flowchart showing tone color and rhythm selection processing applied to switch processing of the electronic musical instrument control method according to the embodiment. 4 is a flowchart showing key depression processing applied to keyboard processing of the electronic musical instrument control method according to the embodiment. 4 is a flow chart showing sounding event processing applied to automatic performance processing of the electronic musical instrument control method according to the embodiment;

Embodiments for implementing an electronic musical instrument, an electronic musical instrument control method, and a control program according to the present invention will be described below in detail with reference to the drawings.
<Electronic Musical Instruments>
FIG. 1 is an external view showing an embodiment of an electronic musical instrument according to the present invention. Here, an electronic keyboard instrument (electronic keyboard) will be shown and described as an embodiment of the electronic musical instrument according to the present invention. FIG. 2 is a diagram for explaining an example of the specifications of the tone generator applied to the electronic musical instrument according to this embodiment.

An embodiment of an electronic musical instrument 100 according to the present invention has, as shown in FIG. , a bender/modulation wheel 108 for adding various modulations (performance effects) such as pitch bend, tremolo, and vibrato, and a display section 110 for displaying tone color, rhythm, and other various setting information. I have. Although not shown, the electronic musical instrument 100 is provided with speakers for outputting musical tones generated by performance, for example, on the rear surface, side surface, or rear surface of the musical instrument body.

In the electronic musical instrument 100 as described above, the timbre selection buttons 104 are, for example, as shown in FIG. "Organ"), . Here, FIG. 1(b) shows 16 kinds of timbre categories. Also, as shown in FIG. 1(c), the rhythm selection button 106 can be used for rock style ("ROCK1" in the figure), pop style ("POP1" in the figure), jazz style ("JAZZ1" in the figure), These are buttons as waveform selection operators for selecting various rhythm categories such as . Here, FIG. 1(c) shows 16 types of rhythm categories. A performer (user) of the electronic musical instrument 100 presses arbitrary tone color selection buttons 104 and rhythm selection buttons 106 to select and play an arbitrary rhythm tone color category from among 16×16 types of rhythm tone colors. be able to.

Here, the specifications of the sound source applied to the electronic musical instrument 100 according to this embodiment will be described. The sound source applied to this embodiment has a well-known PCM (Pulse Code Modulation) waveform reproduction system, and is capable of simultaneously producing a maximum of 256 sounds. Also, as shown in FIG. 2, for example, it has 16 tone generator parts from "0" to "15", and can reproduce 16 kinds of timbres at the same time. Specifically, tone generator part "0" is assigned to the keyboard, and tone generator parts "1" to "15" are assigned to the automatic rhythm function. In particular, tone generator part "1" is defined as a dedicated part to which rhythm tone color is assigned, and tone tone generator parts other than "1" are assigned melody tone color.

The sound source applied to the electronic musical instrument 100 according to the present embodiment has 16 melody tones and 4 rhythm tones. Melody tone colors are assigned tone color numbers "0" to "15", and rhythm tone colors are assigned tone color numbers "16" to "19" (see FIGS. 5 and 6, which will be described later).

That is, in this embodiment, only 16 types of melody tone colors can be played on the keyboard, and these melody tone colors are selected by pressing the tone color selection button 104 shown in FIG. 1(b). Any of the built-in timbres can be used in the automatic rhythm function, which will be described later. However, as shown in FIG. 2, the rhythm timbre is used in only one of the 16 tone generator parts.

Further, in this embodiment, eight types of rhythm patterns are selected by pressing the button arranged above the rhythm selection button 106 shown in FIG. 1(c). Automatic rhythm control buttons are arranged below the rhythm selection buttons 106 . Each rhythm pattern uses one of four types of rhythm tones.

FIG. 3 is a block diagram showing a configuration example of hardware applied to the electronic musical instrument according to this embodiment. FIG. 4 is a block diagram showing an example of the internal structure of the tone generator LSI applied to the electronic musical instrument according to this embodiment.

In the electronic musical instrument 100, for example, as shown in FIG. ing. In the electronic musical instrument 100, the RAM 208 and the flash memory 212 are connected to the system bus 226 via the memory controller 206 and the flash memory controller 210, respectively. 1 is connected to the system bus 226 via the LCD controller 218 and the I/O controller 216, and the electronic musical instrument 100 also includes a keyboard 102, tone color selection buttons 104, and a rhythm controller. A switch panel with select buttons 106 is connected to system bus 226 via key scanner 220 and I/O controller 216 , and bender/modulation wheel 108 is connected to A/D converter 222 and I/O controller 216 . to the system bus 226 via the . The system bus 226 is also connected to a bus controller 224, which controls signals and data transmitted and received between the above components. A D/A converter 228 and an amplifier 230 are also connected to the tone generator LSI 204 . Digital musical tone waveform data output from the tone generator LSI 204 is converted into an analog musical tone waveform signal by the D/A converter 228 and further amplified by the amplifier 230 . After that, it is output from an output terminal or a speaker (not shown).

In this way, the electronic musical instrument 100 is configured around the system bus 226 controlled by the bus controller 224 as a whole. Specifically, the bus controller 224 controls the order of priority when transmitting and receiving signals and data in each of the components connected to the system bus 226 . For example, in the electronic musical instrument 100, the RAM 208 is shared by the CPU 202 and the tone generator LSI 204. However, since the tone generator LSI 204 that performs sound generation is not allowed to lose data, the bus controller 224 delays transmission and reception between the tone generator LSI 204 and the RAM 208. It is set to have the highest priority, and access to RAM 208 by CPU 202 is restricted as necessary.

In the configuration as described above, the CPU 202 is a main processor that performs processing of the entire device, and executes control operations of the electronic musical instrument 100 by executing a predetermined control program while using the RAM 208 as a work area. In particular, in this embodiment, the CPU 202 executes a series of control operations including a musical tone generation method which will be described later.

A RAM (second storage means) 208 has a high access speed (second read speed) and a small storage capacity (second storage capacity; an example for helping understanding) compared to a flash memory 212 described later. (for example, 16 MB or less) is an expensive memory device, and is connected to the system bus 226 via the memory controller 206, which is an interface. The RAM 208 stores waveform data, control programs, various fixed data, and the like transferred from the flash memory 212 . In particular, the RAM 208 has a function as a tone generator memory (corresponding to the above-described waveform memory) for developing waveform data used in tone generation processing executed by the tone generator LSI 204, which will be described later. Data is always placed on RAM 208 . The RAM 208 is also used as a work area for a DSP (digital signal processing circuit) 306 incorporated in the CPU 202 and tone generator LSI 204 . Here, since the memory capacity of the RAM 208 is smaller than that of the flash memory 212, the memory contents of the RAM 208 are sequentially replaced. It is controlled so that it is preferentially transferred from the flash memory 212 to the dedicated storage area of the RAM 208 . As will be described later, this embodiment is characterized by a management method relating to replacement of waveform data among the contents stored in the RAM 208 .

The flash memory (first storage means) 212 has a low access speed (first read speed) and a large storage capacity (first storage capacity; described as an example to aid understanding, for example, 256 MB or more). A memory device connected to the system bus 226 via a flash memory controller 210 as an interface. The flash memory 212 stores waveform data of all tone colors that are used (or that may be used) in the tone generation process executed by the tone generator LSI 204, parameter data of all tone colors, and data for the CPU 202 and tone generator LSI 204. Various fixed data such as program data of a control program executed in the DSP 306, music data, player setting data, etc. are stored. Here, all the waveform data stored in the flash memory 212 are compressed, and one word length is set to 8 bits, for example. The waveform data and the like stored in the flash memory 212 are read out and transferred to the RAM 208 by sequential access by the CPU 202 .

In this embodiment, as a low-speed, large-capacity, and inexpensive memory device, a flash memory (for example, an SSD configured by integrating NAND-type flash memories; Solid State Drive) is applied. The invention is not limited to this, and may apply a hard disk. Here, the flash memory and hard disk may have a configuration that is removable (that is, replaceable) with respect to the electronic musical instrument 100 . Also, if high-speed data transfer is possible, a hard disk on a specific network or on the Internet (that is, on the cloud) may be applied as a large-capacity memory device.

The LCD controller 218 is an IC that controls the display state of the display unit 110 . The key scanner 220 is an IC that scans the state of the keyboard 102, the tone color selection button 104, the rhythm selection button 106, and other switch panels and notifies the CPU 202 of the state. A/D converter 222 is an IC that detects the operating position of bender/modulation wheel 108 . The LCD controller 218, key scanner 220, and A/D converter 222 input/output data and signals to/from the system bus 226 via the I/O controller 216, which is an interface.

A tone generator LSI (sound generator) 204 is a dedicated IC for executing tone generation processing, which will be described later. Here, since the flash memory 212 cannot be randomly accessed from the CPU 202 and cannot be accessed from the sound source LSI 204, the data stored in the flash memory 212 cannot be randomly accessed before reproduction. Once transferred to RAM 208 where possible. Based on the command from the CPU 202, the sound source LSI 204 reads the waveform data transferred to the RAM 208 from the target tone color storage area at a speed corresponding to the pitch of the key specified in the performance. An amplitude envelope of velocity specified by performance is added to the read waveform data, and the resulting waveform data is output as output musical waveform data.

For example, as shown in FIG. 4, the sound source LSI 204 includes a waveform generator 302 having a waveform generator 304 capable of generating 256 waveform data simultaneously, a DSP 306, a mixer 308, and a bus interface 310. Device 302 , DSP 306 and mixer 308 are connected to system bus 226 via bus interface 310 to access RAM 208 and communicate with CPU 202 .

Each waveform generator 304 of the waveform generator 302 is an oscillator that reads out waveform data from the RAM 208 and reproduces a timbre waveform, and the DSP 306 is a signal processing circuit that brings acoustic effects to audio signals. A mixer 308 controls the overall audio signal flow by mixing signals from the waveform generator 302 and transmitting/receiving signals to/from the DSP 306, and outputs the signals to the outside. That is, the mixer 308 adds an envelope according to the musical tone parameters supplied from the CPU 202 by the DSP 306 to the waveform data read from the RAM 208 by the waveform generators 304 of the waveform generator 302 according to the performance. , are output as output musical waveform data. As shown in FIG. 3, the output signal of the mixer 308 is output as an analog signal of a predetermined signal level to speakers, headphones, etc. (not shown) via the D/A converter 228 and the amplifier 230 .

(RAM management method)
In the electronic musical instrument 100 described above, the method of managing the RAM 208 used as the tone generator memory (the specification of the waveform data transfer operation) has the following outline.

In the electronic musical instrument 100 shown in this embodiment, as shown in FIG. 2, the tone generator is composed of 16 parts, and can simultaneously generate up to 16 different timbres. Of these tones, the melody tones played by the performer on the keyboard (including waveforms used in accompaniment) and the rhythm tones used by the automatic rhythm function (rock, pop, jazz, and other percussion sounds) are included. are positioned as timbres with high priority (or frequency of use) in the response (response characteristics) at the time of performance, and the waveform data of these two timbres are stored in the RAM 208 when the timbres are determined (selected). Initiate a transfer to a dedicated storage area. The melody tones played by the player on the keyboard are updated when the operator of the tone color selection button 104 shown in FIG. 1(c) is updated when the operator of the rhythm selection button 106 is pressed (selected). When any of the above tone colors is selected, the waveform data are transferred to the RAM 208 in order from the top waveform number. Here, since it takes a certain amount of time to transfer waveform data, if a performance using tone waveforms that have not been transferred is performed during transfer, the transfer that is currently being performed will be interrupted and By changing the schedule so as to preferentially transfer the timbre waveform that has been set, control is performed so as to minimize the delay. A specific method will be described in detail in the later-described control method.

(Waveform data management method)
Next, the waveform data stored in the above RAM and flash memory will be described in detail.
5 and 6 are diagrams for explaining a method of managing waveform data applied to this embodiment. FIG. 5(a) is an explanatory diagram of a melody tone waveform split, FIG. 5(b) is an explanatory diagram of a melody tone waveform directory, and FIG. 6 is an explanatory diagram of a rhythm tone waveform directory.

In this embodiment, as described above, the performer presses the tone color selection button 104 or the rhythm selection button 106 to select an arbitrary tone color from the 16 types and perform the performance. At this time, in order to reproduce not only the volume and pitch but also the timbre that changes depending on the key range and velocity, the waveform data of the melody and rhythm timbres for each pitch or volume are read from the flash memory 212 into the RAM 208. .

Here, each melody timbre has, for example, a maximum of 32 types of waveforms per timbre, and a maximum of 512 waveforms for 16 timbres. The maximum size of each waveform data is set to 64 KB, for example. As a method of managing waveform data for each pitch or volume for one melody tone color, as shown in FIG. Waveform data is assigned to each of the multiple "Keys" indicated by ), and velocity ("Velocity ”), a timbre waveform split structure is applied that allocates waveform data respectively. That is, in the waveform data management method using the melody tone waveform split structure, the tone range and velocity range of one tone color are two-dimensionally divided, and up to 32 pieces of waveform data are assigned to each split (divided) area. ing. According to this management method, only one waveform data to be read is determined from the two factors of key depression speed (velocity) and key number (key range).

The melody tone waveform data stored in the RAM 208 and the flash memory 212 is managed based on melody tone waveform directory information having a table format. The melody tone waveform directory information is stored in the flash memory 212, and is read from the flash memory 212 and transferred to the RAM 208 by the CPU 202 when the tone color selection button 104 is pressed. When playing musical tones with a certain melody tone color, the CPU 202 reads data of the melody tone waveform directory information corresponding to the melody tone color from the RAM 208 and refers to it.

Specifically, the table of melody tone color waveform directory information stores, for example, as shown in FIG. , "minimum velocity", "maximum velocity", "minimum key number" and "maximum key number" indicating the key range and velocity range in which the waveform data should be sounded, and the melody tone color transferred to the RAM 208. Each item value of "address from the top of the waveform area" indicating the address from the top of the storage area (waveform area) and "waveform size" indicating the data size of the waveform data is registered. That is, in the melody tone waveform directory information, for each waveform data of each melody tone color, key range and velocity range information indicating under what conditions the melody tone waveform split structure is divided, and actual flash Information about the address in the memory 212 and the size of the waveform are defined in the form of a table.

Each rhythm tone color has, for example, a maximum of 50 types of waveforms per tone color, and a maximum of 200 waveforms for four tone colors. Here, as with the melody tone waveforms described above, the maximum value of the size of each waveform data is set to, for example, 64 KB, and each waveform data is limited to one key range that can reproduce the waveform. assigned.

The rhythm tone waveform data stored in the RAM 208 and the flash memory 212 is managed based on rhythm tone waveform directory information having a table format. The rhythm tone waveform directory information is stored in the flash memory 212, and is read from the flash memory 212 and transferred to the RAM 208 by the CPU 202 when the rhythm selection button 106 is pressed. When playing a musical tone with a certain rhythm tone color, the CPU 202 reads the data of the rhythm tone color waveform directory information corresponding to the rhythm tone color from the RAM 208 and refers to it.

Here, for example, as shown in FIG. 6, the table of rhythm tone color waveform directory information contains, for each waveform data included in a rhythm tone color of one "tone color number", the "waveform number" of the waveform data and the waveform "instrument name", "key number", and "group" indicating the type of rhythm instrument associated with the data, the assigned key range, etc.; Each item value of "address from the beginning of the waveform area" indicating the address from the waveform area and "waveform size" indicating the data size of the waveform data is registered. That is, in the rhythm tone waveform directory information, each waveform data of each rhythm tone color is assigned to which key range, and at which address in the flash memory 212 the waveform data is actually allocated. Information about the size is specified in a table format.

It should be noted that some rhythm instruments, such as open hi-hats and closed hi-hats of a drum set, record different performance sounds for one instrument. In this case, it is necessary to implement a mechanism that allows only one performance tone to be sounded at a time (that is, only one performance tone is to be sounded), and the information for this is the item "group" in the rhythm tone waveform directory information. Here, the waveform data with the same "group" are muted except for the last (most recently) played sound.

(Information on RAM and flash memory and transfer processing)
Next, the information on the RAM and flash memory applied to the electronic musical instrument according to the present embodiment and the transfer processing thereof will be described in detail.

FIG. 7 is a diagram for explaining an outline of information on a RAM and a flash memory and its transfer processing applied to this embodiment. FIG. 8 is a diagram for explaining waveform regions of a RAM applied to this embodiment. 8A shows the directory contents of the melody tone waveform buffer, FIG. 8B shows the directory contents of the rhythm tone waveform buffer, and FIG. FIG. 4 shows the contents of a generator waveform buffer directory;

On the RAM 208, as shown in "RAM information" on the left side of FIG. be done. As shown in "Information on Flash Memory" on the right side of FIG. data is expanded.

Here, when the tone generator LSI 204 executes the waveform readout operation with the performance of the electronic musical instrument 100 , the target waveform data must be arranged on the RAM 208 . Therefore, when the electronic musical instrument 100 is activated, for example, the timbre waveform directory information, timbre parameters, CPU programs, CPU data, DSP programs and DSP data shown in FIGS. 5B and 6 are transferred from the flash memory 212 to the RAM 208. be.

Waveform data to be read out by the tone generator LSI 204 must also be stored in the RAM 208. However, since the RAM 208 has a smaller storage capacity than the flash memory 212, the data is not stored in the flash memory 212. It is not possible to store waveform data of all available tone colors on the RAM 208 .

Therefore, in this embodiment, basically, the necessary waveform data is read out from the flash memory 212 when generating sound by playing, and is stored in the waveform buffer allocated on the RAM 208 for each waveform generator 304, which is the sound generation channel. Then, the sound source LSI 204 reads and reproduces the data. Here, the melody tones assigned to the keyboard 102 and the rhythm tones used by the automatic rhythm function have dedicated buffer areas on the RAM 208 as shown in FIG. Waveform data is transferred from the flash memory 212 to a dedicated buffer in the RAM 208 and reproduced. That is, without using the waveform generator waveform buffer on the RAM 208, the waveform data transferred to the dedicated buffer is reproduced.

Further, in this embodiment, in order to reduce the processing load on the CPU 202 during performance and to reduce the processing time, prior to the waveform data transfer processing from the flash memory 212 to the RAM 208, a musical tone specified at the time of key depression is reproduced. is stored in the RAM 208 in advance. If the relevant waveform data already exists on the RAM 208 , the CPU 202 does not transfer the waveform data from the flash memory 212 and duplicates the waveform data between waveform buffers on the same RAM 208 .

The "RAM melody tone waveform buffer directory" shown in FIG. 8(a) indicates the contents of the directory in the buffer area of the RAM 208 in which the melody tone waveform data is stored in the "RAM information" shown in FIG. is. This melody timbre waveform buffer directory is created in the work area (CPU work) of the CPU 202, and its contents are updated when the timbre is selected.

Each buffer area in the melody tone waveform buffer directory is assigned a fixed capacity of 64 KB for each waveform, and the melody tone waveforms and the buffer areas are arranged so that the 32 types of melody tone waveforms correspond to each buffer area in a one-to-one relationship. A buffer area number is set. For example, 4 MB is allocated as the total capacity of all buffer areas in the melody tone waveform buffer directory in this case. The contents of the melody tone waveform buffer directory are, as shown in FIG. The internal waveform number, the address information from the beginning of the melody tone waveform area where the waveform is arranged, and the waveform size are stored.

The "RAM rhythm tone waveform buffer directory" shown in FIG. 8(b) indicates the contents of the directory in the buffer area of the RAM 208 in which the rhythm tone waveform data is stored in the "RAM information" shown in FIG. is. This rhythm timbre waveform buffer directory is created in the work area (CPU work) of the CPU 202, and its contents are updated when a rhythm is selected.

Each buffer area in the rhythm tone waveform buffer directory is assigned a fixed capacity of 64 KB for each waveform. A buffer area number is set. In this case, for example, 8 MB is allocated as the total capacity of all buffer areas in the rhythm tone waveform buffer directory. The contents of the rhythm tone waveform buffer directory are, as shown in FIG. The internal waveform number, the address information from the beginning of the rhythm tone waveform area in which the waveform is arranged, and the waveform size are stored.

The "RAM waveform generator waveform buffer directory" shown in FIG. 8(c) stores the waveform data to be read by the waveform generator 304, which is the tone generation channel, in the "RAM information" shown in FIG. It shows the contents of the directory in the buffer area of the RAM 208 to be processed. This waveform generator waveform buffer directory is secured in the work area (CPU work) of the CPU 202, and its contents are variably stored according to the performance, and updated when a tone is produced or muted.

Each waveform generator 304 is assigned a fixed length of 64 KB to each buffer area of the waveform buffer directory for the waveform generator, and the waveform generator 304 capable of simultaneously generating 256 waveform data and waveform buffers 0 to 255 are allocated to each buffer area. The numbers of the waveform generator 304 and the waveform buffer are set so as to correspond in a one-to-one relationship. For example, 16 MB is allocated as the total capacity of all buffer areas in the waveform buffer directory for the waveform generator in this case. As a result, the electronic musical instrument 100 of this embodiment has a configuration capable of producing 256 sounds simultaneously. The contents of the waveform buffer directory for the waveform generator, as shown in FIG. It stores a transferred flag that is set when the transfer is completed, a timbre number that is information about the waveform read in the buffer, a waveform number within the timbre, and a waveform size.

(How to use waveform data on RAM)
Next, a method of using waveform data on the RAM applied to this embodiment will be described.
In the electronic musical instrument 100 according to this embodiment, when the player presses a key, the CPU 202 first determines the waveform generator 304 in the tone generator LSI 204 that generates waveform data corresponding to the key pressed by the key assigner. Here, the key assignment is preferentially assigned from the waveform generator 304 whose oscillation (sound generation) is stopped.

Next, the CPU 202 adjusts the pitch specified during the performance from the split information of the melody tone waveform shown in FIG. The waveform number of the corresponding waveform data is specified, and it is investigated whether or not the corresponding waveform data exists on the RAM 208 shown in FIG. Here, the CPU 202 first checks whether or not there is waveform data corresponding to the melody tone waveform buffer or the rhythm tone waveform buffer on the RAM 208, and stores the waveform data in the melody tone waveform buffer or the rhythm tone waveform buffer. If the corresponding waveform data does not exist, it is further investigated whether or not it exists in the waveform buffer for the waveform generator.

If the corresponding waveform data exists in the melody tone waveform buffer or the rhythm tone waveform buffer on RAM 208, CPU 202 treats the waveform data on RAM 208 as the target of the read operation for sound generation. If the corresponding waveform data does not exist in the melody tone waveform buffer or the rhythm tone waveform buffer but does exist in the waveform generator waveform buffer, the CPU 202 stores data in the same RAM 208 for sound generation. The waveform data is copied to the waveform buffer corresponding to the waveform generator 304 assigned to . As a result, the necessary waveform data can be placed in the waveform buffer corresponding to the assigned waveform generator 304 on the RAM 208 in a shorter time than the process of transferring the waveform data from the flash memory 212 to the RAM 208 . When the waveform data for sound generation exists in the RAM 208 and the position (address) of the waveform buffer corresponding to the allocated waveform generator 304 is determined, the CPU 202 causes the tone generator LSI 204 to perform a read operation for sound generation. to start.

If the waveform data already exists in the waveform buffer corresponding to the assigned waveform generator 304, it is necessary to transfer the waveform data from the flash memory 212 or duplicate the waveform data in the RAM 208. Instead, the waveform data is used for read operation for sound generation. On the other hand, if the corresponding waveform data does not exist in the melody tone waveform buffer or the rhythm tone waveform buffer, nor does it exist in the waveform generator waveform buffer, the CPU 202 stores the data in the flash memory 212. Also, the corresponding waveform data is transferred to the RAM 208 .

<Method of Controlling Electronic Musical Instruments>
Next, a method of controlling an electronic musical instrument (a method of generating musical tones) according to this embodiment will be described in detail with reference to the drawings. Here, an overall control method for an electronic musical instrument having a musical tone generation method to which the above-described waveform data appropriation method is applied will be described. A series of control processes described below are realized by executing a predetermined control program stored in the RAM 208 in the CPU 202 and tone generator LSI 204 of the electronic musical instrument 100 described above.

(main routine)
FIG. 9 is a flow chart showing the main routine of the electronic musical instrument control method according to the present embodiment.

In the control method of the electronic musical instrument 100 according to the present embodiment, first, when the power of the electronic musical instrument 100 is turned on by the player, the CPU 202 starts the main routine shown in FIG. 9 and initializes each part of the apparatus. An initialization process is executed (step S902).

Next, when the initialization processing is completed, the CPU 202 performs switch processing (step S904) when the performer performs button operations such as tone color selection, rhythm selection, automatic performance playback, stop, etc. A series of processing operations including keyboard processing for key and key release (step S906) and automatic performance processing (step S908) for progressing automatic performance (generation of sounding event and mute event) is repeatedly executed.

Although not shown in the flowchart shown in FIG. 9, the CPU 202 terminates or suspends the performance mode, turns off the power supply of the device, etc. during execution of the above-described processing operations (steps S902 to S908). If a change in status is detected, the main routine is forcibly terminated.

Each processing operation described above will be specifically described below.
(initialization process)
FIG. 10 is a flow chart showing initialization processing applied to the electronic musical instrument control method according to the present embodiment.

In the initialization process applied to the electronic musical instrument control method according to the present embodiment, as shown in the flowchart of FIG. (step S1002).

Next, the CPU 202 transfers the melody and rhythm timbre parameters necessary for sound generation, such as pitch, filter and volume settings, from the flash memory 212 to the RAM 208 (step S1004). Next, the CPU 202 sequentially transfers the CPU program, CPU data, DSP program, and DSP data from the flash memory 212 to the RAM 208 (steps S1006 and S1008). Then, when a series of transfer operations from the flash memory 212 to the RAM 208 is finished, the CPU 202 finishes the initialization process and returns to the main routine.

(Switch processing; first waveform data transfer processing)
FIG. 11 is a flow chart showing the timbre and rhythm selection process applied to the switch process of the electronic musical instrument control method according to the present embodiment.

In the switch processing (step S904) executed when the player operates the buttons and switches provided on the electronic musical instrument 100, the CPU 202 executes tone color selection processing or rhythm selection processing. Specifically, as shown in the flowchart of FIG. 11, the CPU 202 determines whether or not a tone color selection event has occurred due to the player pressing the tone color selection button 104 (step S1102). (Yes in step S1102), up to 32 types of waveform data determined by the tone color number determined by the tone color selection button 104 and the melody tone waveform directory are transferred from the flash memory 212 to the melody tone waveform on the RAM 208. The operation of transferring to the buffer is started (step S1106).

On the other hand, when it is determined that the tone color selection event has not occurred, the CPU 202 determines whether or not the rhythm selection event has occurred due to the performer's pressing operation of the eight types of buttons arranged in the upper row of the rhythm selection buttons 106 . is determined (step S1104). If it is determined that a rhythm selection event has occurred (Yes in step S1104), the CPU 202 selects up to 50 different rhythm tone colors, determined by the rhythm tone number used by the rhythm selected by the rhythm selection button 106 and the rhythm tone waveform directory. The operation of transferring the waveform data from the flash memory 212 to the rhythm tone waveform buffer on the RAM 208 is started (step S1108).

If the CPU 202 determines that neither the timbre selection event nor the rhythm selection event has occurred (No in steps S1102 and S1104), it ends the switch processing and returns to the main routine.

(Keyboard processing; second waveform data transfer processing, sound generation processing, determination processing, transfer control processing)
FIG. 12 is a flow chart showing key depression processing applied to the keyboard processing of the electronic musical instrument control method according to the present embodiment.

In keyboard processing (step S906) executed when the player operates the keyboard 102 provided in the electronic musical instrument 100, the CPU 202 determines whether or not a key depression event or key release event has occurred due to the keyboard operation. judge each. When it is determined that a key-depression event has occurred, the CPU 202 first performs key assignment processing as shown in the flow chart of FIG. One of the waveform generators 304 is assigned (step S1202).

Next, the CPU 202 obtains the pressed key number (keyboard position) and velocity (speed at which the key is pressed) (step S1204), and stores this information and the keyboard (tone source part number "0" shown in FIG. 2). ), the corresponding waveform number is obtained from the melody tone waveform directory shown in FIG. 5B (step S1206).

Next, the CPU 202 checks whether or not the waveform data of the corresponding waveform number exists in the melody tone waveform buffer on the RAM 208 (step S1208). If the waveform data of the waveform number corresponding to the melody tone waveform buffer exists (Yes in step S1208), the CPU 202 uses the waveform data of the melody tone waveform buffer for the previously assigned waveform generator 304. to start sounding (step S1210).

In step S1208, if the waveform data of the corresponding waveform number does not exist in the melody tone waveform buffer (No in step S1208), the CPU 202 stores the waveform data of the corresponding waveform number in the waveform generator waveform buffer on the RAM 208. already exists (step S1212). If the waveform data of the corresponding waveform number already exists in any of the waveform buffers for the waveform generator (Yes in step S1212), the CPU 202 stores the waveform data in the waveform buffer for the waveform generator in which the waveform data exists, The waveform buffer associated with the previously allocated waveform generator 304 is duplicated (step S1214).

In step S1212, if there is no waveform data of the corresponding waveform number in any of the waveform generator waveform buffers (No in step S1212), the CPU 202 starts the above-described switch processing (timbre selection event generation), The transfer of the waveform data for the melody tone waveform from the flash memory 212 to the melody tone waveform buffer on the RAM 208, which has been executed, is temporarily interrupted (step S1216). At this time, the CPU 202 stores in the CPU work information indicating how far the waveform data has been transferred to the melody tone waveform buffer on the RAM 208 so that the transfer of the waveform data can be restarted.

Next, the CPU 202 transfers the waveform data of the corresponding waveform number from the flash memory 212 to the previously allocated waveform buffer for the waveform generator (step S1218). After the waveform data is transferred, CPU 202 restarts the transfer of the waveform data from flash memory 212 to the melody tone waveform buffer on RAM 208 based on the information saved in the CPU work (step S1220). ).

Next, the CPU 202 causes the previously assigned waveform generator 304 to start generating sound using the waveform data duplicated or transferred to the waveform buffer for the waveform generator in step S1214 or step S1218. (Step S1222). Then, after the performer performs the sounding operation based on the keyboard operation, the CPU 202 terminates the keyboard processing and returns to the main routine.

(Automatic performance processing)
FIG. 13 is a flow chart showing sound generation event processing applied to the automatic performance processing of the electronic musical instrument control method according to the present embodiment.

In the automatic performance process (step S908) executed by the automatic performance function provided in the electronic musical instrument 100, the CPU 202 determines whether or not a sounding event or a muting event occurs as the automatic performance progresses. When it is determined that a sounding event has occurred, the CPU 202 first performs key assignment processing as shown in the flow chart of FIG. One waveform generator 304 is assigned (step S1302).

Next, the CPU 202 acquires the tone generator part number, tone color number, key number and velocity from the pronunciation event (step S1304), and determines whether the acquired tone generator part number is "1" or other than "1". (Step S1306). If the tone generator part number is determined to be "1", the CPU 202 acquires the corresponding waveform number from the rhythm tone waveform directory shown in FIG. 6 based on the acquired tone color number, key number, and velocity. (Step S1308).

Next, the CPU 202 checks whether or not the waveform data of the corresponding waveform number exists in the rhythm tone waveform buffer on the RAM 208 (step S1310). If the waveform data of the waveform number corresponding to the rhythm tone waveform buffer exists (Yes in step S1310), the CPU 202 causes the previously assigned waveform generator 304 to use the waveform data in the rhythm tone waveform buffer. to start sounding (step S1312).

In step S1310, if there is no waveform data with the corresponding waveform number in the rhythm tone waveform buffer (No in step S1310), the CPU 202 stores the waveform data with the corresponding waveform number in the waveform generator waveform buffer on the RAM 208. already exists (step S1314). If the waveform data of the corresponding waveform number already exists in any of the waveform buffers for the waveform generator (Yes in step S1314), the CPU 202 stores the waveform data in the waveform buffer for the waveform generator in which the waveform data exists, The waveform buffer associated with the previously allocated waveform generator 304 is duplicated (step S1316).

In step S1314, if there is no waveform data of the corresponding waveform number in any of the waveform generator waveform buffers (No in step S1314), the CPU 202 starts the above-described switch processing (rhythm selection event generation), The transfer of waveform data for the rhythm tone waveform from flash memory 212 to the rhythm tone waveform buffer on RAM 208, which has been in progress, is temporarily interrupted (step S1318). At this time, the CPU 202 stores in the CPU work information indicating how far the waveform data has been transferred to the rhythm tone waveform buffer on the RAM 208 so that the waveform data transfer can be restarted.

Next, the CPU 202 transfers the waveform data of the corresponding waveform number from the flash memory 212 to the previously allocated waveform buffer for the waveform generator (step S1320). After the waveform data has been transferred, the CPU 202 restarts the transfer of the rhythm tone waveform data from the flash memory 212 to the rhythm tone waveform buffer on the RAM 208 based on the information saved in the CPU work (step S1322). ).

On the other hand, if it is determined in step S1306 that the tone generator part number is other than "1", the CPU 202 selects the melody tone color shown in FIG. A corresponding waveform number is obtained from the waveform directory (step S1324). Next, the CPU 202 transfers the waveform data of the corresponding waveform number from the flash memory 212 to the previously allocated waveform buffer for the waveform generator (step S1326).

Next, the CPU 202 causes the previously assigned waveform generator 304 to start generating sound using the waveform data copied or transferred to the waveform buffer for the waveform generator in steps S1316, S1320, or S1326. (step S1328). After the sounding operation in the automatic performance process is performed, the CPU 202 terminates the automatic performance process and returns to the main routine.

As described above, this embodiment has a multi-part structure that has a plurality of tone generator parts and can reproduce a plurality of tones at the same time. It has a tone generator system (musical tone generator) that transfers waveform data stored in a tone generator to a high-speed, small-capacity storage device (RAM) of the tone generator and then reproduces the data. In such a tone generator system, the priority (or When tone color or rhythm is selected, transfer of only tone waveforms with high frequency of use from flash memory to RAM that can be accessed by the CPU at high speed or to a waveform buffer for direct reproduction by the tone generator LSI is started in advance. Thereby, the transfer speed of waveform data is increased.

As a result, according to the present embodiment, the time required for processing to generate musical tones can be shortened, and a performance with excellent response can be performed. That is, according to the present embodiment, after performing an operation for sound generation, the waveform data necessary for sound generation is transferred from a low-speed, large-capacity storage device such as a flash memory to a high-speed, small-capacity tone generator memory. Compared to , it is possible to greatly reduce the transfer time of waveform data used for generating rhythm tones and keyboard tones for the performer, for which response is emphasized during performance, or to reduce the transfer operation of the waveform data itself. can be made unnecessary. Therefore, it is possible to efficiently utilize the limited transfer capability and storage capacity of hardware such as a storage device, CPU, and system bus, and to realize an electronic musical instrument with excellent musical response (response characteristics). can be done.

In the above-described embodiment, the waveform data stored in the RAM 208 is transferred from the flash memory 212 to the RAM 208 prior to transferring the waveform data from the flash memory 212 to another waveform stored in the RAM 208 . It is checked whether it already exists in the buffer, and if it exists, the waveform data in the waveform buffer is copied to the waveform buffer corresponding to the waveform generator 304 assigned for sound generation, and then read out for sound generation. I explained when to use it. The present invention is not limited to a form in which such waveform data is substantially indirectly read out and used. Alternatively, the waveform data in the waveform buffer may be directly read out by the assigned waveform generator 304 and used for sound generation.

Although several embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and includes the invention described in the claims and their equivalents.
The invention described in the original claims of the present application is appended below.

(Appendix)
[1]
a tone color selection process for selecting the first tone color from among a plurality of tone colors including at least a first tone color and a second tone color specified by performance data to be reproduced;
first waveform data for transferring a plurality of first waveform data corresponding to the first timbre selected by the timbre selection process from the first storage means to a timbre waveform buffer in the second storage means according to the selection; a transfer process;
second waveform data corresponding to the second timbre designated by the performance data is transferred from the first storage means to the waveform generating device to which oscillation is assigned in the second storage means in accordance with the reproduction; a second waveform data transfer process for transferring to the waveform buffer;
A musical tone corresponding to the first timbre is generated by the sound generator based on the plurality of first waveform data stored in the timbre waveform buffer, and a musical tone corresponding to the second timbre is generated by the waveform generator. a sounding process for causing the sounding unit to sound based on the second waveform data stored in the waveform buffer;
An electronic instrument that performs

[2]
Either one of the plurality of first waveform data and the second waveform data to be sounded by the sound generation processing is stored in the second storage during the transfer of the plurality of first waveform data by the first waveform data transfer processing. a judgment process for judging whether or not stored in the means;
When it is determined by the determination process that the plurality of first waveform data are not stored in the second storage means, the transfer of the plurality of first waveform data by the first waveform data transfer process is interrupted, and sound is generated by the sound generation process. a transfer control process for preferentially transferring waveform data from the first storage means to the second storage means;
The electronic musical instrument according to [1], which executes

[3]
The transfer control process transfers the waveform data to be sounded by the sound generation process from the first storage means to the second storage means, and then restarts the transfer of the plurality of first waveform data. electronic musical instrument.

[4]
In the sound generation process, one of the plurality of first waveform data and the second waveform data to be sounded is stored in a waveform buffer corresponding to a certain waveform generator in the second storage means. any of [1] to [3], in which the waveform data is duplicated in a waveform buffer corresponding to the waveform generator to which the oscillation is assigned, and the sound generating unit is caused to generate sound based on the duplicated waveform data. The electronic musical instrument described in

[5]
to the computer of the electronic musical instrument,
a tone color selection process for selecting the first tone color from among a plurality of tone colors including at least a first tone color and a second tone color specified by performance data to be reproduced;
first waveform data for transferring a plurality of first waveform data corresponding to the first timbre selected by the timbre selection process from the first storage means to a timbre waveform buffer in the second storage means according to the selection; a transfer process;
second waveform data corresponding to the second timbre designated by the performance data is transferred from the first storage means to the waveform generating device to which oscillation is assigned in the second storage means in accordance with the reproduction; a second waveform data transfer process for transferring to the waveform buffer;
A musical tone corresponding to the first timbre is generated by the sound generator based on the plurality of first waveform data stored in the timbre waveform buffer, and a musical tone corresponding to the second timbre is generated by the waveform generator. a sounding process for causing the sounding unit to sound based on the second waveform data stored in the waveform buffer;
How to run

[6]
to the computer of the electronic musical instrument,
a tone color selection process for selecting the first tone color from among a plurality of tone colors including at least a first tone color and a second tone color specified by performance data to be reproduced;
first waveform data for transferring a plurality of first waveform data corresponding to the first timbre selected by the timbre selection process from the first storage means to a timbre waveform buffer in the second storage means according to the selection; a transfer process;
second waveform data corresponding to the second timbre designated by the performance data is transferred from the first storage means to the waveform generating device to which oscillation is assigned in the second storage means in accordance with the reproduction; a second waveform data transfer process for transferring to the waveform buffer;
A musical tone corresponding to the first timbre is generated by the sound generator based on the plurality of first waveform data stored in the timbre waveform buffer, and a musical tone corresponding to the second timbre is generated by the waveform generator. a sounding process for causing the sounding unit to sound based on the second waveform data stored in the waveform buffer;
program to run.

100 Electronic musical instrument 102 Keyboard 104 Tone selection button 106 Rhythm selection button 202 CPU
204 sound source LSI (sound generator)
208 RAM (second storage means)
212 flash memory (first storage means)
304 waveform generator

Claims (7)

at least a first timbre;by automatic playa tone color selection process for selecting the first tone color from among a plurality of tone colors including a second tone color specified by the performance data to be reproduced;
first waveform data for transferring a plurality of first waveform data corresponding to the first timbre selected by the timbre selection process from the first storage means to a timbre waveform buffer in the second storage means according to the selection; a transfer process;
second waveform data corresponding to the second timbre designated by the performance data is transferred from the first storage means to the waveform generating device to which oscillation is assigned in the second storage means in accordance with the reproduction; a second waveform data transfer process for transferring to a waveform buffer;
A musical tone corresponding to the first timbre is generated by the sound generator based on the plurality of first waveform data stored in the timbre waveform buffer, and a musical tone corresponding to the second timbre is generated by the waveform generator. a sounding process for causing the sounding unit to sound based on the second waveform data stored in the waveform buffer;
Either one of the plurality of first waveform data and the second waveform data to be sounded by the sound generation processing is stored in the second storage during the transfer of the plurality of first waveform data by the first waveform data transfer processing. a judgment process for judging whether or not stored in the means;
When it is determined by the determination process that the plurality of first waveform data are not stored in the second storage means, the transfer of the plurality of first waveform data by the first waveform data transfer process is interrupted, and sound is generated by the sound generation process. a transfer control process for preferentially transferring waveform data from the first storage means to the second storage means;
an electronic instrument that performs The transfer control process transfers the waveform data to be sounded by the sound generation process from the first storage means to the second storage means, and then restarts the transfer of the plurality of first waveform data. The electronic musical instrument according to claim 1. a tone color selection process for selecting the first tone color from among a plurality of tone colors including at least a first tone color and a second tone color specified by performance data reproduced by automatic performance;
first waveform data for transferring a plurality of first waveform data corresponding to the first timbre selected by the timbre selection process from the first storage means to a timbre waveform buffer in the second storage means according to the selection; a transfer process;
second waveform data corresponding to the second timbre designated by the performance data is transferred from the first storage means to the waveform generating device to which oscillation is assigned in the second storage means in accordance with the reproduction; a second waveform data transfer process for transferring to the waveform buffer;
A musical tone corresponding to the first timbre is generated by the sound generator based on the plurality of first waveform data stored in the timbre waveform buffer, and a musical tone corresponding to the second timbre is generated by the waveform generator. a sounding process for causing the sounding unit to sound based on the second waveform data stored in the waveform buffer;
and run
In the sound generation process, one of the plurality of first waveform data and the second waveform data to be sounded is stored in a waveform buffer corresponding to a certain waveform generator in the second storage means. the waveform data is duplicated in a waveform buffer corresponding to the waveform generator to which the oscillation is assigned, and the sound generating unit is caused to generate sound based on the duplicated waveform data;
electronic musical instrument. to the computer of the electronic musical instrument,
a tone color selection process for selecting the first tone color from among a plurality of tone colors including at least a first tone color and a second tone color specified by performance data reproduced by automatic performance;
first waveform data for transferring a plurality of first waveform data corresponding to the first timbre selected by the timbre selection process from the first storage means to a timbre waveform buffer in the second storage means according to the selection; a transfer process;
second waveform data corresponding to the second timbre designated by the performance data is transferred from the first storage means to the waveform generating device to which oscillation is assigned in the second storage means in accordance with the reproduction; a second waveform data transfer process for transferring to the waveform buffer;
A musical tone corresponding to the first timbre is generated by the sound generator based on the plurality of first waveform data stored in the timbre waveform buffer, and a musical tone corresponding to the second timbre is generated by the waveform generator. a sounding process for causing the sounding unit to sound based on the second waveform data stored in the waveform buffer;
Either one of the plurality of first waveform data and the second waveform data to be sounded by the sound generation processing is stored in the second storage during the transfer of the plurality of first waveform data by the first waveform data transfer processing. a judgment process for judging whether or not stored in the means;
When it is determined by the determination process that the plurality of first waveform data are not stored in the second storage means, the transfer of the plurality of first waveform data by the first waveform data transfer process is interrupted, and sound is generated by the sound generation process. a transfer control process for preferentially transferring waveform data from the first storage means to the second storage means;
How to run to the computer of the electronic musical instrument,
at least a first timbre;by automatic playa timbre selection process for selecting the first timbre from among a plurality of timbres including a second timbre specified by performance data to be reproduced;
first waveform data for transferring a plurality of first waveform data corresponding to the first timbre selected by the timbre selection process from the first storage means to a timbre waveform buffer in the second storage means according to the selection; a transfer process;
second waveform data corresponding to the second timbre designated by the performance data is transferred from the first storage means to the waveform generating device to which oscillation is assigned in the second storage means in accordance with the reproduction; a second waveform data transfer process for transferring to a waveform buffer;
A musical tone corresponding to the first timbre is generated by the sound generator based on the plurality of first waveform data stored in the timbre waveform buffer, and a musical tone corresponding to the second timbre is generated by the waveform generator. a sounding process for causing the sounding unit to sound based on the second waveform data stored in the waveform buffer;
Either one of the plurality of first waveform data and the second waveform data to be sounded by the sound generation processing is stored in the second storage during the transfer of the plurality of first waveform data by the first waveform data transfer processing. a judgment process for judging whether or not stored in the means;
When it is determined by the determination process that the plurality of first waveform data are not stored in the second storage means, the transfer of the plurality of first waveform data by the first waveform data transfer process is interrupted, and sound is generated by the sound generation process. a transfer control process for preferentially transferring waveform data from the first storage means to the second storage means;
to runprogram. electronic musical instrument computer
a tone color selection process for selecting the first tone color from among a plurality of tone colors including at least a first tone color and a second tone color specified by performance data reproduced by automatic performance ;
first waveform data for transferring a plurality of first waveform data corresponding to the first timbre selected by the timbre selection process from the first storage means to a timbre waveform buffer in the second storage means according to the selection; a transfer process;
second waveform data corresponding to the second timbre specified by the performance data is transferred from the first storage means to the waveform generator to which the oscillation in the second storage means is assigned in accordance with the reproduction; a second waveform data transfer process for transferring to the waveform buffer;
A musical tone corresponding to the first timbre is generated by the sound generator based on the plurality of first waveform data stored in the timbre waveform buffer, and a musical tone corresponding to the second timbre is generated by the waveform generator. a sounding process for causing the sounding unit to sound based on the second waveform data stored in the waveform buffer;
and run
In the sound generation process, one of the plurality of first waveform data and the second waveform data to be sounded is stored in a waveform buffer corresponding to a certain waveform generator in the second storage means. , replicating the waveform data in a waveform buffer corresponding to the waveform generator to which the oscillation is assigned, and causing the sound generator to produce sound based on the replicated waveform data. to the computer of the electronic musical instrument,
a tone color selection process for selecting the first tone color from among a plurality of tone colors including at least a first tone color and a second tone color specified by performance data reproduced by automatic performance;
first waveform data for transferring a plurality of first waveform data corresponding to the first timbre selected by the timbre selection process from the first storage means to a timbre waveform buffer in the second storage means according to the selection; a transfer process;
second waveform data corresponding to the second timbre designated by the performance data is transferred from the first storage means to the waveform generating device to which oscillation is assigned in the second storage means in accordance with the reproduction; a second waveform data transfer process for transferring to the waveform buffer;
A musical tone corresponding to the first timbre is generated by the sound generator based on the plurality of first waveform data stored in the timbre waveform buffer, and a musical tone corresponding to the second timbre is generated by the waveform generator. a sounding process for causing the sounding unit to sound based on the second waveform data stored in the waveform buffer;
and
In the sound generation process, one of the plurality of first waveform data and the second waveform data to be sounded is stored in a waveform buffer corresponding to a certain waveform generator in the second storage means. the waveform data is duplicated in a waveform buffer corresponding to the waveform generator to which the oscillation is assigned, and causes the sound generator to produce sound based on the duplicated waveform data.

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