JPH10124051A - Music data processing method, reproducing method for music data after processing, and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a music data processing method, reproducing method for music data after processing, and storage medium which can secure the operation of a program by reducing the RAM consumption of a software sound source and also securing RAM capacity that another application program that is concurrently executed uses. SOLUTION: Music data whose conversion is instructed by a user are scanned to extract system switching event data, bank select event data, and program change event data S1, the kind of a sound source system that system switching indicates and the timbre number of a timbre that bank switching and a PC indicate are stored in the header of the music data S22, and the loading/ unloading timing of respective individual timbre data used by the music data is determined S23; and a loading instruction or unloading instruction is assigned as the system exclusive event data and system exclusive event data corresponding to the determined loading/unloading indication are embedded S24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a music data processing method for processing supplied music data, a processed music data reproduction method for reproducing music data processed by the processing method,
And storage media.

[0002]

2. Description of the Related Art In recent years, with the improvement in the arithmetic performance of CPUs, a general-purpose computer or a CPU mounted on a dedicated tone generator has been designed to execute a program describing a predetermined tone generation processing procedure.
(Musical Instrument Digital Interface) A so-called software sound source (hereinafter referred to as “soft sound source”) that generates musical sound waveform data according to performance information such as signals (codes).
Abbreviated) has appeared.

[0003]

However, in the above-mentioned conventional soft sound source, since arbitrary music data is reproduced,
A memory that refers to the timbre data (timbre parameters, waveform table, etc.) corresponding to all timbre numbers in advance by the CPU (this memory is usually a “RAM”.
AM "in the description).

For example, in the case of a soft sound source using a waveform memory sound source system (hereinafter, referred to as a "PCM sound source system") in which the actual performance sound of a musical instrument is converted into PCM and stored, and the stored waveform is read out to generate a musical sound. Is a GM (General MI)
DI) It is necessary to develop all tone data corresponding to 128 tones, which is the basic specification of the system, in RAM.
Since the total capacity of this tone data is about 2 Mbytes,
It made up a significant portion of the total RAM capacity.

[0005] On the other hand, if the device executing this software tone generator program is, for example, a general-purpose computer, the current general-purpose computer uses a multitasking function to execute other application programs while executing the software tone generator program. Since the program is often executed, the RAM is shared by the software tone generator program and the other application programs. Therefore, when the above-described tone data is expanded in the RAM, the capacity of the RAM that can be used by other application programs is reduced, and the operation speed is reduced, or in the worst case, the operation itself cannot be performed. there were.

The present invention has been made in view of the above problems, and has been made to reduce the capacity of a RAM used by a software sound source.
A music data processing method, a processed music data reproduction method, and a storage medium capable of securing the capacity of a RAM used by another application program that is being executed at the same time and thereby ensuring the operation of the other application program. The purpose is to provide.

[0007]

In order to achieve the above object, a music data processing method according to the present invention comprises a storage step of storing music data in a storage means, and a timbre selection event included in the stored music data. An extracting step of extracting, and a load instruction event for instructing loading of the timbre data selected by the timbre switching event at a position a predetermined time before the location at which the timbre selection event is extracted from the stored music data. And an insertion step of inserting.

Preferably, when it is detected that the tone color data selected immediately before the occurrence of the tone color selection event is not selected thereafter, an unload instruction event for instructing unloading of the tone color data is inserted. A step of inserting an unload instruction event.

The method of reproducing music data after processing according to the present invention further comprises a supplying step of supplying music data including event data and timing data indicating the timing of occurrence of the event data, and, prior to reproducing the supplied music data, An extracting step of extracting a tone selection event included in the song data; and a reproducing step of sequentially reading each data of the supplied song data and generating an event designated by the corresponding event data at a timing designated by the timing data. And at the time of reproducing the supplied music data,
A load instruction step of generating a load instruction event of the tone data prior to the occurrence of the tone color selection event; and a second storage unit storing the designated tone color data in response to the load instruction. Transferring the timbre data to the storage means, and generating a tone using the timbre data stored in the first storage means in response to the generated event. I do.

Preferably, at the time of reproducing the supplied music data, an unload instruction step for generating an unload instruction event of tone data not used thereafter, and in response to the unload instruction, the designated tone data Is deleted from the first storage means.

In order to achieve the above object, a storage medium of the present invention includes a storage module for storing music data in storage means, an extraction module for extracting a timbre selection event included in the stored music data, Inserting a load instruction event, which inserts a load instruction event for instructing loading of the timbre data selected by the timbre switching event at a position a predetermined time before the location where the timbre selection event is extracted from the stored music data. And a module.

Preferably, when it is detected that the tone color data selected immediately before the occurrence of the tone color selection event is not selected thereafter, an unload instruction event for instructing unloading of the tone color data is inserted. An unload instruction event insertion module is provided.

Further, the storage medium of the present invention includes a supply module for supplying music data including event data and timing data indicating the timing of occurrence thereof, and a music data included in the music data prior to reproduction of the supplied music data. An extraction module for extracting a timbre selection event to be read out, a reproduction module for sequentially reading each data of the supplied music data, and generating an event specified by the corresponding event data at a timing specified by the timing data; A load instruction module for generating a load instruction event for the timbre data prior to the occurrence of the timbre selection event when the reproduced music data is reproduced, and the designated timbre data are stored in response to the load instruction. Transfer for transferring the tone color data from the second storage means to the first storage means Joule, in response to the generated event, characterized in that it comprises a generation module for generating a musical tone by using the tone color data stored in said first storage means.

Preferably, when the supplied music data is reproduced, an unload instruction module for generating an unload instruction event for tone data not used thereafter, and the designated unload instruction module responding to the unload instruction. It is characterized by including a deletion module for deleting timbre data from the first storage means.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of a general-purpose computer to which a music data processing method and a processed music data reproducing method according to an embodiment of the present invention are applied.

In FIG. 1, a computer according to the present embodiment has a keyboard (including a mouse as a pointing device) 1 for inputting various information, a CPU 2 for controlling the entire apparatus, and the CPU 2 executes the computer. ROM 3 for storing a control program, table data, etc., and a CPU
A RAM 4 for temporarily storing control programs and various application programs executed by the CPU 2, song data (MIDI data file), various tone color data used when reproducing the song data, various input information, calculation results, and the like;
A timer 5 for measuring an interrupt time and various times in a timer interrupt process; a display 6 for displaying various information, for example, a large LCD or a CRT and an LED; , A hard disk device having a hard disk for storing music data, various tone data, and other various data, for example, a CD-ROM (Compact Disk-Read Only Memory)
y), MO (Magneto Optical disk), MD (Mini Dis
drive device 8 for driving an external storage medium such as k)
And a network I / O 9 for transmitting and receiving data to and from the server computer 102 via the communication network 101, for example, and an LSI called "codec".
Sound I / O 10 and sampling frequency F
and a sampling frequency generator 11 for generating s and supplying it to the sound I / O 10 and one sample of the tone waveform from the tone waveform buffer DMAB secured at a predetermined position in the RAM 4 to output the generated tone waveform data. DMA that directly reads and outputs to the sound I / O 10
It comprises a C (Direct Memory Access Controller) 12 and a sound system 13 such as a loudspeaker for converting an analog tone signal from the sound I / O 10 into sound.

The above components 1 to 12 are interconnected via a bus 14, a communication network 101 is connected to the network I / O 9, an external input 103, a sampling frequency generator 11, DMA
C12 and sound system 13 are connected.

As described above, the control program executed by the CPU 2 is stored in the hard disk device 7,
If the control program is not stored in OM3,
By storing a control program in the hard disk device 7 and reading it into the RAM 4,
3 can cause the CPU 2 to perform the same operation as when the control program is stored. This makes it easy to add a control program, upgrade a version, and the like.

The network I / O 9 is, as described above,
It is connected to a communication network 101 such as a LAN (local area network), the Internet, or a telephone line, and is connected to a server computer 102 via the communication network 101. When the above-mentioned programs and various parameters are not stored in the hard disk device 7, the network I / O 9 is used to download the programs and parameters from the server computer 102. A computer serving as a client (a general-purpose computer according to the present embodiment) transmits a command for requesting download of a program or parameter to a server computer 102 via a network I / O 9 and a communication network 101. The server computer 102 receives the command, distributes the requested program or parameter to the computer via the communication network 101, and the computer receives the program or parameter via the network I / O 9, and 7, the download is completed.

In addition, an interface for directly exchanging data with an external computer or the like may be provided.

The sound I / O 10 is, as described above,
It is composed of an LSI called "codec" and mainly performs the following operation.

1) An A / D converter and a D / A converter are provided. The A / D converter converts an analog tone signal from the external input 103 into a digital signal, and
CM (Adaptive Differential Pulse Code Modulatio
n) Data compression by the method is performed, and the data is expanded and output to the D / A converter.

2) Two FIFOs (First In Fir
st Out) A memory (not shown) is provided, and in accordance with a sampling clock of frequency Fs from the sampling frequency generator 11, the A / D converted waveform data is input to an input FIFO.
At the same time, the waveform data (sample) stored in the output FIFO memory is sent to the D / A converter.

3) When data is stored in the input FIFO memory or when there is free space in the output FIFO memory, a signal (hardware interrupt signal) requesting data processing (the processing of FIG. 13 described later) Is output to the DMAC 12.

The DMAC 12 responds to the hardware interrupt signal from the sound I / O 10, that is, a sample request interrupt signal generated by the sound I / O 10 at the period of the sampling clock (1 / Fs). Waveform data (sample) stored in buffer DMAB
Is output to the sound I / O 10 one sample at a time. In response to this, the sound I / O 10 counts the number of transfer samples transferred from the DMAC 12, and the number of samples equal to の of the entire buffer size of the musical tone waveform buffer DMAB (waveform data for one frame to be described later). Each time the data is transferred, a hardware interrupt is generated indicating that the reproduction of the waveform data for one frame is completed. That is, the tone waveform buffer DMAB is configured to store waveform data for two frames, and in the waveform generation processing of FIG. 12 described later, a number corresponding to half the buffer size of the tone waveform buffer DMAB at a time. Is generated.

FIG. 2 shows an example of sound source data stored in the sound source data storage area. The sound source data storage area is an area secured at a predetermined position in the RAM 4 for storing the sound source data, and the capacity of the area is variable according to the capacity of the stored sound source data.

As shown in FIG.
Data (FM data, PCM data, physical model data), management information, and other data according to various sound source systems are illustrated.

The data corresponding to the various sound source systems is constituted by system data and tone color data, respectively. In FIG. 2, the format of the PCM data is shown as a representative of data corresponding to each sound source system. The PCM system data corresponds to the system data, and the parameter data (PCM P
ARAM. ) And waveform table data (WABETA)
BLE) corresponds to the tone data.

The system data includes a driver (program) for performing processing according to various occurrence events, a generation program for generating musical tone waveform data according to the sound source system, and a work area.

The timbre data differs according to each sound source system. In the FM sound source system, the number of operators, algorithm,
Parameters for controlling the EG and the like of each operator, and data such as a basic waveform table such as a sine wave, and in the PCM sound source system, parameters such as an EG and a filter, and data such as a waveform table serving as a material for musical sounds. The physical model sound source method includes algorithm control data, various coefficients, parameters such as EG, and data such as a non-linear table.

In this embodiment, the capacity of the system data and tone data stored in the sound source data storage area is as follows.
It is as follows.

The FM data has 60 kbytes of system data, 40 bytes of timbre data (one tone) × 128 timbres (all timbres in GM), and the PCM data has 70 kbytes of system data and several kbytes of timbre data. The physical model data is 20 kbytes for the system data and 20 kbytes for the timbre data (/ 1 tone) × several tones.

As described above, since the volume of each format data is smaller than the tone color data, the music to be reproduced is determined.
When the sound source system specified in the music is determined, all the system data corresponding to the sound source system is stored in the corresponding area of the sound source data storage area before the reproduction of the music. Further, since the volume of the tone data of the FM data is smaller than that of the system data, in the present embodiment, the tone data is always stored in the area corresponding to the sound source data storage area for all tone colors.

In the present embodiment, the tone waveform data is generated by a software program.
Music waveform data can be generated by designating a plurality of sound source systems with one piece of music data, for example, by specifying different sound source systems for each performance part. For this reason, for example, a musical tone waveform is generated using only the FM sound source method in a certain song, while a musical tone waveform is generated using the FM sound source method and the PCM sound source method in a certain song. Since the sound source system is different, data according to the sound source system stored in the sound source data storage area is determined according to the music data. FIG. 2 shows an example in which three types of sound source systems are specified in one music piece. The sound source system need not be limited to these three types (FM sound source system, PCM sound source system, and physical model sound source system), and any sound source system such as a chaos sound source system or a harmonic synthesis system may be adopted. .

Next, an outline of the waveform calculation processing will be described with reference to FIG.

In the figure, when reproduction of music data is started, a performance input (MIDI event) starts to be supplied to an input buffer (not shown). The CPU 2 performs a musical sound generation process based on the performance input supplied in the immediately preceding frame in accordance with the activation opportunity set for each section of a predetermined time length (hereinafter, referred to as “frame”) according to each performance input. Perform according to the specified sound source system. For example, the tone generation processing based on the performance input supplied in the frame from time t1 to t2 is executed in the frame from time t2 to t3.

When the tone waveform data for one frame is generated by the tone generating process in this manner, the waveform data is written into the tone waveform buffer DMAB, and the reproduction of the written data is reserved. The DMAC
Reference numeral 12 reads out, on a frame-by-frame basis, one sample of tone waveform data from the tone waveform buffer DMAB reserved for reproduction in the immediately preceding frame, and outputs the sample to the sound I / O. For example, as shown in FIG. 3, the tone waveform data output in the frame from time t2 to time t3, written in the tone waveform buffer DMAB and reserved for reproduction is read out in the frame from time t3 to t4. Will be played.

The hatched portion in the generation operation block of FIG. 3 indicates that the musical sound waveform generation operation is being performed by the physical model sound source system. In the musical tone generation operation using the physical model sound source method, the load per sound is large, so in the present embodiment, only one sound is generated. Therefore,
As shown in the figure, the calculation time is almost constant. Needless to say, in a region other than the hatched portion, a musical tone waveform generation operation using another sound source system is performed.

Next, an outline of the control processing executed by the computer of the present embodiment will be described.

The computer according to the present embodiment can be broadly classified into two types of processing: tone generation processing for generating and generating tone waveform data, and tone generation preprocessing performed before the tone generation processing. Since the former tone generation processing is performed by a known method except for a part, the outline description thereof is omitted.

The pre-tone generation process mainly includes the following three processes.

(1) Music Data Download Processing This processing is performed for music data created in, for example, the SMF (Standard MIDI File) format (hereinafter, “music data SM”).
F ”) from the server computer 102 via the communication network 101. In this process, the downloaded music data SMF
When the system data or timbre data used in the above is not stored in the hard disk device 7, a process of downloading the system data or timbre data from the server computer is also performed.

(2) Music Data Conversion Processing In this processing, the downloaded music data SMF or the music data SMF created by the user is analyzed, and the sound source system switching event data and the timbre switching event data in the music data SMF are analyzed. When the song data is reproduced, before the event data is read, a load instruction event for storing (loading) the tone color data indicated by the event data in a corresponding area of the sound source data storage area, and a subsequent song A process of embedding an unload instruction event for deleting (unloading) tone data no longer used in the data SMF from the sound source data storage area at a required position in the music data SMF, that is, replacing the original music data SMF with the music data SMF ′.

(3) Music data reproduction start instruction processing In this processing, the music data SMF has been subjected to the above music data conversion processing (hereinafter referred to as “converted music data SMF ′”).
, The sound source data (system data and timbre data) necessary for starting the reproduction of the converted music data SMF 'is loaded, and then the reproduction start is instructed. If the music data SMF is not the converted music data SMF', This is a process of performing the same process as the above-described music data conversion process, loading sound source data necessary for reproducing the music data, and instructing the reproduction start.

Here, as shown in FIG. 4, the music data SMF is composed of header data and sequence data. The header data is composed of data such as the title of the song, the data capacity, the date of creation, the file format (SMF, GM, etc.), and the sequence data is, for example, note-on / off event data, control change event data, program It is composed of various MIDI event data such as change event data, bank select event data, and system exclusive event data, and timing data indicating the generation timing of each MIDI event data. And
In the present embodiment, since the music data is configured to be able to generate a musical tone by a maximum of three kinds of sound source systems (FM sound source system, PCM sound source system, and physical model sound source system) in the same music, the sequence data includes the three sound sources. System switching event data for switching the type of sound source system is also stored as needed. Although the system switching event data is not currently adopted as MIDI standard event data, if it is adopted in the future, it may be used.
It may be constituted by the system exclusive event data.

Hereinafter, the details of the control processing executed by the computer of the present embodiment will be described with reference to FIGS.

FIG. 5 is a flowchart showing the procedure of the main program executed by the computer of the present embodiment, in particular, by the CPU 2.

In the figure, first, initialization such as clearing of the RAM 4 is performed (step S1).

Next, the occurrence of the following activation factors is checked (step S2).

Trigger 1: The MIDI event has occurred.

Activation factor 2: The reproduction of the tone waveform data of one frame is completed, and the hardware interrupt signal is generated from the sound I / O 10.

Activation factor 3: The user operates an input operator such as a mouse or keyboard 1 and an operation event thereof is detected.

Activation factor 4: The user performs an operation process for ending the main routine, and this operation event is detected.

In the following step S3, the above-mentioned activation factors 1 to 1
It is determined whether any one of the activation factors 1 to 4 has occurred. If none of the activation factors 1 to 4 has occurred, the process returns to the step S2. If any of the activation factors 1 to 4 has occurred, the process returns to the step S4. The process proceeds to determine which activation factor has occurred.

As a result of the discrimination in step S4, when "activation factor 1" occurs, the process proceeds to step S5, and a MIDI process corresponding to the generated MIDI event is executed. When "activation factor 2" occurs, the process proceeds to step S6. When a waveform generation process described later with reference to FIG. 12 is executed and “activation factor 3” occurs, the process proceeds to step S7, where other processes corresponding to the generated event are executed, and when “activation factor 4” occurs, Proceeding to step S8, for example, end processing such as returning the display on the display 6 to a state before the main program is started is executed.

Then, after completing any of steps S5 to S7, the process returns to step S2 and repeats the above-described processing. On the other hand, when the processing of step S8 is completed, the main routine ends.

FIG. 6 is a flowchart showing a detailed procedure of the music data download processing.
This is one of the other processes in step S7. For example, when the user clicks a download button (icon) displayed on the display 6 with the mouse, the download process is started.

In FIG. 6, first, a download process for downloading music data specified by the user from the server computer 102 via the communication network 101 is executed (step S11).

Next, the system data and timbre data used in the music data SMF downloaded in step S11 are detected (step S12). In the present embodiment, since the system data is determined by the system switching event data, the data is searched to detect the sound source system, while the timbre data is specified by the specified sound source system and the bank select event data. Since the data and program change event data are determined, the latter two data are searched, and the timbre number is detected based on the detected sound source system.

In the following step S13, step S12
It is determined whether or not the system data detected in step 1 is stored in the hard disk device 7. If the system data is not stored in the hard disk device 7, the system data is transferred to the system data server via the communication network 101. On the other hand, when the data is downloaded from the (server computer 102) (step S14), if the method data is stored in the hard disk device 7, step S14 is skipped and the process proceeds to step S15.

In step S15, it is determined whether or not the tone color data detected in step S12 is stored in the hard disk device 7. If the tone color data is not stored in the hard disk device 7, the process proceeds to step S14.
In the same manner as described above, the timbre data is downloaded from the timbre data server (server computer 102) via the communication network 101 (step S16), and then the download process is terminated, while the timbre data is stored in the hard disk device 7. If so, the download process ends immediately.

FIG. 7 is a flowchart showing a detailed procedure of the music data conversion processing. This process is also one of the other processes in step S7, and the user clicks the music data conversion button (icon) displayed on the display 6 with the mouse as in the download process of FIG. Is activated.

In FIG. 7, first, music data SMF instructed by the user to be converted is scanned to convert system change event data (system change), bank select event data (bank change), and program change event data (PC). Extract (Step S2
1).

Next, the type of the sound source system indicated by the extracted system switching, the extracted bank switching, and the timbre number of the timbre indicated by the PC are stored in the header of the music data SMF (step S22). Here, in the header, a set of the extracted sound source system and the corresponding timbre number is stored so as not to be duplicated for all the extracted data. As a result, as shown in FIG.
The system data and tone color data used by the MF can be known.

In the following step S23, step S21
Since the timbre (number) is determined according to the bank and the PC extracted in the above, that is, according to the bank and the PC,
The load / unload timing of each individual tone data used in the music data SMF is determined according to the tone number (step S23). This timing is determined as follows.

1) When tone data not stored in the tone generator data storage area in FIG. 2 is designated, the timing for instructing the bank switching and loading of the tone data x seconds before the PC is determined. . Here, x seconds is the time when the loading of the timbre data is completed, that is, the time when the timbre data is read from the hard disk device 7 and stored in the corresponding area of the sound source data storage area. The number of seconds is changed according to the amount of data. Note that x seconds may be a fixed value (time to complete loading of any tone data, regardless of the type of tone data), regardless of the type of tone data.

2) When the timbre data stored in the sound source data storage area is designated, it goes without saying that the timing for instructing the loading is not determined.

3) Of the tone data which is no longer used due to the bank switching and PC etc. in the middle of the song data SMF, the tone color data which is not used in the subsequent song data is
Immediately after the bank switching and PC (or after a predetermined time)
To instruct the user to unload. However, if the volume of the tone color data stored in the sound source data storage area becomes too large, an instruction to unload is issued even for tone color data to be used thereafter (excluding the tone color data used immediately thereafter). If it is known that a plurality of songs are to be played back continuously (chain playback), the tone data to be used in the subsequent songs will be replaced by the sound source data if there is a free space left in the sound source data storage area. It may be left in the storage area.

Next, in step S24, a load instruction or an unload instruction is assigned as system exclusive event data (SE), and in the music data SMF,
The system exclusive event data corresponding to the determined load / unload instruction is embedded at the position of the timing determined in step S23.

In the step S25, similarly to the processing in the steps S13 to S16 in FIG. 6, when the system data and the timbre data which are not on the hard disk device 7 are used, the data is transmitted to the communication system. After downloading from the server computer 102 to the hard disk device 7 via the network 101, the music data conversion processing ends.

In this way, the converted music data SMF 'is created by the music data conversion processing.

FIG. 8 is a flowchart showing a detailed procedure of the music data reproduction start instruction processing. This process is also one of the other processes in step S7, and the user clicks the music data reproduction start button (icon) displayed on the display 6 with the mouse, for example, as in the download process of FIG. It is started by doing.

In FIG. 8, first, a file of the reproduction music data designated by the user is loaded into the reproduction music data storage area secured at a predetermined position in the RAM 4 (step S3).
0).

Next, it is determined whether or not the file loaded in step S30 is the converted music data SMF '(step S31). If it is converted music data SMF', the reproduction preparation processing, that is, the reproduction start is started. A process of loading necessary system data and tone color data is executed (step S32). Here, as described above, data corresponding to all sound source systems specified by the converted music data SMF 'is loaded as described above. Next, after instructing the reproduction start of the converted music data SMF '(step S33), the main music data reproduction start processing is ended.

On the other hand, if the loaded file is not the converted music data SMF 'in step S31, the loaded music data is scanned in step S34, as in step S21, and the system switching, bank switching, and PC Extracted, and in step S35, the
Similarly, the load / unload timing of each individual tone data used in the music data is determined according to the bank and the PC. In step S36, the load / unload timing is determined at the timing determined in step S35. Create a sub-track recording the loading instruction.

In the following step S37, the aforementioned step S
As in the case of No. 32, the reproduction preparation processing is performed. In step S38, after the instruction to start the simultaneous reproduction of the music data and the sub-track created in step S36 is issued, the music data reproduction instruction processing ends.

FIG. 9 is a flowchart showing the procedure of the note-on event process, which is one of the processes during the MIDI process in step S5 in FIG. This processing is based on the MID
It is activated when a note-on event of the I event occurs.

In FIG. 9, first, note-on event data input to the buffer is analyzed, and its note number is stored in a predetermined area NN of the RAM 4 and its velocity is stored in a predetermined area VE of the RAM 4. (Step S41).

Next, a RAM is used to store the tone generator system.
In step S42, sound assignment is performed based on the contents of the area TM secured at the predetermined position of No. 4 (hereinafter, this content is referred to as "sound source method TM"). The sound source system TM is determined by the system switching event as described above.

An area TC secured at a predetermined position in the RAM 4 for storing the tone generator system TM and the tone color number.
(Hereinafter referred to as “timbre number TC”), a tone generator register (not shown) of the channel to which the tone is assigned is set, and the tone waveform data of the tone color number TC is set by the tone generator method TM. After giving a sound generation start instruction to generate and generate sound (step S43), the note-on event processing is ended. Here, the tone color number TC is determined by the bank select event data and the program change event data as described above.

FIG. 10 is a flowchart showing the procedure of the load instruction event process.
This is one process during the DI process. This processing is performed in step S
It is started when the load instruction event embedded in 24 (or S36) occurs.

Before executing the load processing, it is checked whether or not the tone data or the like designated to be loaded is stored in the tone generator data storage area. Good.

In FIG. 10, after the designated timbre data or the like is loaded from the hard disk device 7 into the corresponding area of the sound source data storage area (step S51), the load instruction event processing is terminated.

FIG. 11 is a flowchart showing the procedure of the unload instruction event process, which is one of the MIDI processes in step S5. This process is started when the unload instruction event embedded in step S24 (or S36) occurs.

In FIG. 11, after the designated tone color data and the like are deleted from the corresponding area of the sound source data storage area (step S61), the unload instruction event processing ends.

FIG. 12 is a flowchart showing the detailed procedure of the waveform generation processing in step S6 in FIG.

In the figure, first, preparation for a musical sound generation operation by the first tone generator method is performed (step S71).

Next, a tone generation calculation for a plurality of channels is performed according to the currently selected tone generator system (step S72), and it is determined whether or not there is a tone generation calculation according to the next tone generator system (step S73). If there is a tone generation operation by the next sound source system, preparation for the tone generation operation by the next sound source system is made (step S74), and then the process returns to step S72.

On the other hand, if there is no waveform calculation by the next sound source method in step S73, effect calculation is performed on the tone waveform data for one frame generated in step S72 (step S75), and the tone waveform data for the one frame is processed. After the data is reserved for reproduction in the DMAC 12 (step S76), the waveform generation processing ends.

FIG. 13 shows the DMA executed by the DMAC 12.
It is a flowchart which shows the procedure of a C process. This processing is
As described above, at the cycle of the sampling signal output from the sampling frequency generator 11 to the sound I / O 10, the sound I / O 10 is activated in response to a sample request interrupt (hardware interrupt) generated.

In FIG. 13, the tone waveform buffer D
During MAB, one of the tone waveform data at the position indicated by the pointer p
The sample is transferred to a buffer (not shown) (not shown) of the sound I / O 10 which is a DAC (the input FIFO memory) (step S81), and after the pointer p is incremented by "1" (step S82), the DMAC process ends.

As described above, in the present embodiment,
Prior to the reproduction of the music data, the music data is analyzed, the position of the timbre switching (such as a program change) is detected in advance, and at the time of reproducing the music data, the timbre switching required for the timbre switching is performed a predetermined time before the timbre switching. While generating a load instruction event for loading the timbre data into the RAM, if the timbre data before switching is not used later (or not used for a predetermined time or more) at the time of the timbre switching, the timbre data is stored in the RAM.
Since the data is erased from the AM, only the necessary timbre data is developed on the RAM in accordance with the reproduction of the music data, whereby the occupancy of the timbre data in the RAM can be minimized. Therefore, even when another application program is being executed, the operation of the other application program can be ensured.

Incidentally, the capacity of the sound source data loaded in the sound source data storage area of the RAM 4 is about 70 kbytes when the designated sound source system is only the FM sound source system, and the capacity of the designated sound source system is FM. Sound source method and P
In the case of the CM sound source system, it is about 500 kbytes,
When the designated sound source system is the FM sound source system, the PCM sound source system, and the physical model sound source system, it is about 600 kbytes, which is much smaller than the conventional PCM sound source system described above and 2 Mbytes. I have.

Further, prior to the reproduction of the music data, the load /
To embed an unload instruction event, the CP
The load on U is reduced.

Further, as in the present embodiment, by preparing load / unload timings prior to reproduction, the CPU load during reproduction can be reduced. For example, when using it for BGM such as a game,
Since the music data is prepared in advance, it can be embedded in advance, so that the present invention can be applied.

Further, in this embodiment, the load / unload instruction event is embedded as system exclusive event data, so that the processed music data is reproduced by a normal sequencer in the same manner as the music data before processing. can do. This is because the system exclusive event data that cannot be interpreted by the electronic musical instrument of the MIDI standard is ignored.

In the present embodiment, the load / unload instruction event is created before the reproduction of the music data. However, the present invention is not limited to this, and the data after the reproduction position is reproduced during the reproduction of the music data. If there is a pre-reading tone color selection event, a load instruction event may be generated a predetermined time before the tone color selection event. In this way, even at a stage where the music data is only partially completed, a musical sound can be generated by the method of the present invention. For example, while receiving song data from the network,
An unload instruction event can be embedded.

According to the processing method of the present invention, music data embedded in advance may be distributed via a network.

In this embodiment, the deletion (unloading) of the timbre data stored in the sound source data storage area is performed as follows.
Although it is performed in units of music, the present invention is not limited to this, and tone data that has not been used for a long time (for example, 10 minutes or more) may be deleted.

A storage medium storing a software program for realizing the functions of the above-described embodiments is stored in a storage medium.
It is needless to say that the object of the present invention can be achieved also by supplying the program to the system or the apparatus and causing the computer (or CPU 2 or MPU) of the system or the apparatus to read and execute the program stored in the storage medium.

In this case, the program itself read from the storage medium realizes the novel function of the present invention,
The storage medium storing the program constitutes the present invention.

The storage medium for supplying the program includes, for example, the hard disk, CD-ROM,
MO, MD, floppy disk, CD-R (CD-Reco
rdable), magnetic tape, nonvolatile memory card, RO
M3 or the like can be used. Further, the program may be supplied from the server computer 102 via another MIDI device or the communication network 101.

When the computer executes the readout program, not only the functions of the above-described embodiments are realized, but also the OS running on the computer is actually executed based on the instructions of the program. It goes without saying that a part or all of the above-described processing is performed, and the functions of the above-described embodiments are realized by the processing.

Further, after the program read from the storage medium is written into the memory provided in the function expansion board inserted into the computer or the function expansion unit connected to the computer, the program is executed based on the instructions of the program. It goes without saying that the CPU 2 or the like provided in the expansion board or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.

[0106]

As described above, according to the music data processing method of the present invention, the timbre switching event is stored in the stored music data at a position a predetermined time before the position where the timbre selection event is extracted. Since a load instruction event for instructing the loading of the tone data selected in is inserted, the load instruction is inserted prior to the reproduction of the music data.
In addition to reducing the load on the CPU during reproduction, only the necessary timbre data is developed in the storage means when reproducing the music data, so that the occupancy of the timbre data in the storage means can be suppressed to a minimum. It has an effect.

Preferably, when it is detected that the tone color data selected immediately before the occurrence of the tone color selection event is not selected thereafter, an unload instruction event for instructing unloading of the tone color data is inserted. Therefore, an unload instruction is inserted prior to the reproduction of the music data, thereby suppressing the load on the CPU at the time of reproduction, and at the time of reproducing the music data, only the necessary tone data is developed in the storage means. Therefore, it is possible to minimize the occupation ratio of the tone color data in the storage unit.

According to the processed music data reproduction method of the present invention, when reproducing the supplied music data, a load instruction event of the tone data is generated prior to the generation of the tone selection event, and the load instruction is generated. The timbre data is transferred from the second storage means in which the designated timbre data is stored to the first storage means, and stored in the first storage means in accordance with the event that has occurred. Since the musical tone is generated using the tone data,
Only the necessary timbre data is developed in the storage means, whereby the occupancy of the timbre data in the storage means can be minimized.

Preferably, at the time of reproduction of the supplied music data, an unload instruction event of tone data not used thereafter is generated, and in response to the unload instruction,
Since the designated timbre data is deleted from the first storage means, only the necessary timbre data is developed in the storage means when the music data is reproduced, whereby the occupancy of the timbre data in the storage means is reduced. It can be minimized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a general-purpose computer to which a music data processing method and a processed music data reproduction method according to an embodiment of the present invention are applied.

FIG. 2 is a diagram showing an example of sound source data stored in a sound source data storage area.

FIG. 3 is a diagram for explaining an outline of a musical sound generation process performed by the computer of FIG. 1;

FIG. 4 is a diagram showing a data format of music data.

FIG. 5 is a flowchart illustrating a procedure of a main program executed by a CPU of FIG. 1;

FIG. 6 is a flowchart showing a detailed procedure of music data download processing.

FIG. 7 is a flowchart showing a detailed procedure of music data conversion processing.

FIG. 8 is a flowchart showing a detailed procedure of a music data reproduction start instruction process.

FIG. 9 is a flowchart illustrating a procedure of a note-on event process.

FIG. 10 is a flowchart illustrating a procedure of a load instruction event process.

FIG. 11 is a flowchart illustrating a procedure of an unload instruction event process.

FIG. 12 is a flowchart illustrating a detailed procedure of a waveform generation process in FIG. 6;

FIG. 13 is a flowchart illustrating a procedure of a DMAC process performed by the DMAC of FIG. 1;

[Explanation of symbols]

 2 CPU 4 RAM (storage means, second storage means) 7 Hard disk drive (first storage means)

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hideyuki Masuda 10-1 Nakazawa-cho, Hamamatsu-shi, Shizuoka Yamaha Corporation

Claims (8)

[Claims] 1. A storage step of storing song data in storage means; an extraction step of extracting a timbre selection event included in the stored song data; and extracting the timbre selection event from the stored song data. A load instruction event inserting step of inserting a load instruction event for instructing loading of the timbre data selected by the timbre switching event at a position a predetermined time before the selected position. 2. When detecting that tone color data selected immediately before the occurrence of the tone color selection event is not selected thereafter, an unload instruction event for instructing unloading of the tone color data is inserted. 2. The music data processing method according to claim 1, further comprising an unload instruction event inserting step. 3. A supply step of supplying music data including event data and timing data indicating the generation timing thereof, and extracting a timbre selection event included in the music data prior to reproduction of the supplied music data. An extracting step, a reproducing step of sequentially reading out the data of the supplied music data, and generating an event specified by the corresponding event data at a timing specified by the timing data; and a reproducing step of reproducing the supplied music data. A load instruction step of generating a load instruction event of the timbre data prior to the occurrence of the timbre selection event; and, in response to the load instruction, a second storage unit storing the designated timbre data. A transfer step of transferring the timbre data to the first storage means; In response, the music data reproduction method characterized by having: a generation step of generating a musical tone by using the tone color data stored in said first storage means. 4. An unload instruction step of generating an unload instruction event of tone data not used thereafter at the time of reproducing the supplied music data, and, in response to the unload instruction, transmitting the designated tone data. 4. The music data reproduction method according to claim 3, further comprising a deletion step of deleting the music data from the first storage means. 5. A storage module for storing song data in storage means, an extraction module for extracting a tone color selection event included in the stored song data, and an extraction module for extracting the tone color selection event from the stored song data. A load instruction event insertion module for inserting a load instruction event for instructing the loading of the timbre data selected by the timbre switching event at a position a predetermined time before the specified position, and a computer-implementable program stored therein. Medium. 6. When detecting that the tone color data selected immediately before the occurrence of the tone color selection event is not selected thereafter, an unload instruction event for instructing unloading of the tone color data is inserted. 6. The storage medium according to claim 5, further comprising an unload instruction event insertion module. 7. A supply module for supplying music data including event data and timing data indicating the generation timing thereof, and extracting a timbre selection event included in the music data prior to reproduction of the supplied music data. An extraction module, a playback module that sequentially reads out the data of the supplied music data, and generates an event specified by the corresponding event data at a timing specified by the timing data. A load instruction module for generating a load instruction event for the timbre data prior to the occurrence of the timbre selection event; and a second storage unit storing the designated timbre data in response to the load instruction. A transfer module for transferring the timbre data to the first storage means; Depending on the event, the first storage means and a generation module for generating a musical tone using the stored tone color data storage medium which stores a program for the computer can be realized. 8. An unload instruction module that generates an unload instruction event for tone data that is not used thereafter during reproduction of the supplied music data, and, in response to the unload instruction, transmits the designated tone data. The storage medium according to claim 7, further comprising a deletion module that deletes from the first storage unit.