JP2001215962A - Musical sound producing device and storage medium with stored program for processing musical sound production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent noise from being recorded at the time of starting/stopping recording in the case of storing waveform data produced according to inputted music data in memory. SOLUTION: Concerning music data inputted from a MIDI interface 7 or a sequencer 8, a CPU 1 displays the name of the music on a display part 5 according to a program of a ROM 3, also generates waveform data according to the music data, converts the data into analog signals by a D-A converter 9, and makes a loudspeaker 11 produce sound via an amplifier 10. Moreover, when switches to start and stop recording are operated from a manipulator 6 concerning the generated waveform data, a sound volume control is performed so as to smooth rapid variation in the sound volume of the waveform data to be recorded, by fading in and fading out the waveform data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tone generator and a storage medium storing a tone generation program.

[0002]

2. Description of the Related Art In a tone generator which uses a personal computer or the like to configure tone data waveform data by software, music data in the MIDI data format is read and waveform data is generated by arithmetic processing in accordance with the music data. Then, the waveform data is output to a sound system to generate sound. When the music data is composed of a plurality of channels, the combined waveform data of each channel is output to the sound system. It has also been proposed to generate and pronounce waveform data and save and edit the waveform data generated by operating a recording switch in an internal memory or an external memory such as a floppy disk.

[0003]

However, when recording waveform data, if the waveform data has already been generated and the sound is being generated at the moment of the recording start switch operation, the recording level is changed from the zero level to that level. Noise is generated because the amplitude of the waveform data suddenly changes. Also,
Even when the waveform data already generated at the moment of the recording stop switch operation is being recorded, noise occurs because the recording level rapidly changes from the amplitude of the waveform data to the zero level. For this reason, there is a problem that noise is recorded at the time of recording start and recording stop.

[0004] It is an object of the present invention to prevent noise from being recorded at the start and stop of recording when waveform data generated according to input music data is stored and stored in a memory.

[0005]

According to a first aspect of the present invention, there is provided a musical sound generating apparatus for inputting music data composed of a plurality of event data.
U1) and waveform generating means for generating waveform data based on music data input by the input means (corresponding to CPU1 in FIG. 1 in the embodiment).
Operating means for inputting start information for starting storage of waveform data generated by the waveform generating means and end information for ending storage in accordance with an operation (in the embodiment,
When the start information is inputted by the operation means, the storage of the waveform data in a predetermined storage means is started, and the end information is inputted by the operation means. At this time, the storage control means (corresponding to the CPU 1 in FIG. 1 in the embodiment) for ending the storage, and when the storage control means starts the storage, the volume value of the stored waveform data is set to a predetermined minimum value. From the original volume value to the original volume value at regular intervals, and when the storage control means terminates the storage, the volume value of the stored waveform data is gradually attenuated from the original volume value to the minimum value at the regular intervals. Volume control means (in the embodiment,
(Corresponding to the CPU 1 of FIG. 1).

According to a fifth aspect of the present invention, in the storage medium, an input procedure for inputting music data composed of a plurality of event data, and a waveform generating procedure for generating waveform data based on the music data input by the input procedure A setting procedure for setting start information for starting storage of waveform data generated by the waveform generation procedure and end information for ending storage according to an operation; and when the start information is set by the setting procedure, A storage control procedure for starting storage of the waveform data in a predetermined storage means and terminating the storage when the end information is set by the setting procedure; and a storage control when the storage control procedure starts storage. The volume value of the waveform data is gradually increased from a predetermined minimum value to an original volume value at regular intervals, and when the storage control procedure ends the storage, the stored value is stored. The volume value of the waveform data stores tone generation processing program that executes, and a volume control procedure for gradually attenuated for each of the predetermined time from the original volume value to said minimum value allowed.

According to the first or fifth aspect of the present invention, when storing and storing the waveform data generated according to the input event data, the stored waveform is used when the storage is started. The data volume value is gradually increased from a predetermined minimum value to an original volume value at regular intervals, and when the storage is completed, the volume value of the stored waveform data is increased from the original volume value to a predetermined minimum value at regular intervals. Gradually attenuate.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a musical tone generating apparatus according to an embodiment of the present invention. FIG. 1 shows a system configuration of a musical sound generator according to the embodiment. In FIG. 1, a CPU 1 is connected to a ROM 3, a RAM 4, a display unit 5, an operator 6, a MIDI interface 7, a sequencer 8, and a D / A converter 9 via a system bus 2. The CPU 1 exchanges commands and data with each unit via the system bus 2 to control the entire apparatus.

The ROM 3 stores a program for tone generation processing executed by the CPU 1 and initial data in initialization. The RAM 4 is a work area of the CPU 1 and has an area for storing a file name described later and waveform data corresponding to the file name.
In addition, various registers, flags,
It has an area such as a pointer. The display unit 5 is a CRT
And an LCD, and displays data such as a song name and a message according to a display command by the CPU 1. Controller 6
Is composed of various switches and a mouse, and inputs commands and data to the CPU 1 according to operations.

The MIDI interface 7 is connected to an external M
Connects to an IDI device to send and receive music data in MIDI data format. The sequencer 8 stores music data inputted in advance or music data received via the MIDI interface 7 in a MIDI data format. D / A
The converter 9 converts the waveform data output from the CPU 1 into an analog signal and causes the speaker 11 to generate sound through the amplifier 10.

Next, the operation of the tone generation processing in the embodiment will be described with reference to the flowcharts shown in FIGS. 2 to 6 and FIGS. 8 to 13 and the display screen shown in FIG. FIG. 2 is a main flow of a musical sound generation process of the CPU 1 in the first embodiment. Predetermined initialization processing
After (Step A1), a file creation process of the music data to be saved (Step A2), a channel designation process (Step A1)
3), recording setting processing (step A4), MIDI input processing (step A5), recording start / end processing (step A)
6), a processing loop including a waveform data generation process (step A7) and other processes (step A8) is repeatedly executed.

FIG. 3 is a flowchart of a file creation process in step A2 in the main flow of FIG. First, it is determined whether or not the file creation switch of the operator 6 has been turned on (step B1). If this switch is not turned on, this flow is immediately terminated and the flow returns to the main flow. When the switch is turned on, a file name input process is performed (step B2). Next, it is determined whether or not the end switch of the operator 6 has been turned on (step B3). If this switch has not been turned on, the file name input process in step B2 is continued. When this switch is turned on, the input file name is stored in the RAM 4.
(Step B4). Then, this flow ends and the process returns to the main flow.

FIG. 4 is a flow chart of a channel designation process in the main flow of FIG. First, it is determined whether or not the channel designation switch of the operator 6 has been turned on (step C1). If this switch is not turned on,
This flow is immediately terminated and the process returns to the main flow. When this switch is turned on, a channel number input process is performed (step C2). Next, it is determined whether or not the end switch of the operation element 6 has been turned on (step C3). If this switch has not been turned on, the channel number input process in step C2 is continued. When this switch is turned on, the input channel number is set in the register CH (step C4). Then, this flow ends and the process returns to the main flow.

FIGS. 5 and 6 show the flow of the recording setting process in step A4 in the main flow of FIG. FIG.
In step D1, it is determined whether or not a REC (recording) switch has been turned on (step D1). If the REC (recording) switch has been turned on, the recording flag RCF is inverted (step D2). Next, RCF
Is set to 1 (recording mode) (step D3). If the RCF is 0, this flow is immediately terminated and the process returns to the main flow. If the RCF is 1, a recording setting screen as shown in FIG. 7 is displayed (step D4). Then, a mouse cursor is displayed on the screen (step D5).

On the screen of FIG. 7, a fade-in time setting area 21 and a fade-out time setting area 22 are displayed. The setting area 21 and the setting area 22 are provided with a fade-in area and a fade-out area for displaying time data input from the operation unit 6 in 1 msec units. Further, an "OK" switch 23, a "cancel" switch 24, and an "end" switch 25 are displayed on the screen.

Next, the data of the register FIT for storing the fade-in time is transferred to the register FITIME for temporarily storing the fade-in time (step D).
6). A register F for storing the fade-out time
The OT data is transferred to a register FOTIME that temporarily stores the fade-out time (step D7).
Next, the fade-in time and the fade-out time are displayed in the fade-in area and the fade-out area in FIG. 7 according to the value of the FITIME and the value of the FOTIME (step D8).

Next, it is determined whether or not the mouse has been moved (step D9). When the mouse is moved, the cursor is moved (step D10). Next, it is determined whether or not the mouse has been clicked (step D11). If the mouse has not been clicked, the process proceeds to step D13 to determine the movement of the mouse. When the mouse is clicked, it is determined in which area the cursor is located at that time.

It is determined whether or not the cursor is located at the position of the fade-in area (step D12). If the cursor is at this position, it is determined whether or not there is a data input of the fade-in time from the operation element 6 (step D12). D13). If there is data input, the input data is set in FITIME (step D14). Then, the process shifts to step D8 to display the fade-in time of the FITIME in the fade-in area.

If it is determined in step D12 that the cursor is not located at the fade-in area, it is determined whether the cursor is located at the fade-out area (step D15). If it is in this position, it is determined whether or not there is a data input of the fade-out time from the operator 6 (step D16). When data is input, the input data is set in FOTIME (step D1).
7). Then, the process shifts to step D8 to display the fade-out time of FOTIME in the fade-out area.

If the cursor is not located at the fade-out area, it is determined in the flow of FIG. 6 whether the cursor is located at the position of the "OK" switch (step D18). If it is at this position, the value of FITIME is transferred to FIT (step D19), and the value of FOTIME is transferred to FOT (step D20). If there is no cursor at the position of the "OK" switch, it is determined whether the cursor is at the position of the "cancel" switch (step D21). If it is located at this position, the process moves to step D9 in FIG. 5 to determine the movement of the mouse. If there is no cursor at this position, it is determined whether the cursor is at the position of the "end" switch (step D2).
2). If it is at this position, the setting screen of FIG. 7 is deleted (step D23), and the process returns to the main flow of FIG.
After transferring the fade-in time and the fade-out time to the FIT and FOT, the setting screen is deleted (step D23), and the process returns to the main flow in FIG.

FIG. 8 shows the MI in the main flow of FIG.
It is a flow of DI input processing. It is determined whether or not event data in the MIDI data format is input (step E).
1) If there is no input, immediately terminate this flow and return to the main flow. When the event data is input, it is determined whether or not the event data is a note event (step E2). That is, it is determined whether the event is a note-on event or a note-off event. If it is a note event, it is further determined whether or not the note event is a note-on event.
(Step E3).

If the event is a note-on event, the data of the channel number of the event is set in the pointer ch (step E4). Then, 1 (sound generation instruction) is set to the ON flag ONF (ch) of the channel number (step E5). Next, the event note data is set in the register NOTE (ch) (step E6),
Event velocity data in register VEL (ch)
(Step E7). Then, this flow ends and the process returns to the main flow.

If the input note event is a note-off event in step E3, the data of the channel number of the event is set in the pointer ch (step E8). Then, 0 (mute instruction) is set to the ON flag ONF (ch) of the channel number.
(Step E9). Next, the event note data is set in the register NOTE (ch) (step E10), and 0 (zero volume) is set in the register VEL (ch).
(Step E11). Then, this flow ends and the process returns to the main flow.

In step E2, if the input event is not note data but another event, such as a control change or a program change, other processing corresponding to the input event is executed (step E2). Step E12). Then, this flow ends and the process returns to the main flow.

FIG. 9 is a flowchart of the start / end processing of step A6 in the main flow of FIG. First, it is determined whether or not the recording start switch has been turned on (step F1). When this switch is turned on, the save flag STF is set to "1 (save mode)" (step F).
2), the header flag HF is set to "1 (write header information)"
(Step F3). Further, the fade-in flag FIF is set to "1 (fade-in state)" (step F4), and the fade-in operation flag FICF is set to "1 (operation start)" (step F5). Next, the minimum volume value MIN is set in the register VOL (step F6), the timer interrupt is permitted (step F7), and the process returns to the main flow. By permitting the timer interrupt, the value of the timer register T is incremented every time the timer interrupt occurs, as shown in FIG. 10 (step F7a).

If the start switch has not been turned on in step F1 of FIG. 9, it is determined whether or not the recording end switch has been turned on (step F8). When this switch is turned on, the fade-out flag FOF is set to "1".
(Fade-out state) "(step F
9) The fade-out operation flag FOCF is set to "1 (operation start)" (step F10). Then, the timer interrupt is permitted (step F7), and the process returns to the main flow.

FIG. 11 is a flow chart of the generation processing in step A7 in the main flow of FIG. First, it is determined whether or not the STF is “1 (save mode)” (step G1). If this flag is "1", it is determined whether or not HF is "1 (write header information)".
(Step G2). If this flag is "1",
The header information is written in the header of the file in the RAM 4 (step G3), and the HF is set to "0 (writing completed)"
(Step G4). After writing the header information and setting HF to "0", the flow shifts to step G5. Alternatively, when the STF is “0 (save end mode)” in step G1, or when the HF is “0” in step G2, the process proceeds to step G5 without writing header information.

In step G5, a pointer n for designating a channel number is set to "1", and a buffer DATA for outputting waveform data is set to "0 (clear)".
Next, it is determined whether or not the ON flag ONF (n) designated by n is "1 (sound generation instruction)" (step G6). If this flag is "1", waveform data is generated based on NOTE (n) and VEL (n) (step G7). Next, it is determined whether or not the STF is “1”.
(Step G8). If the flag is "1" and the storage mode is set, it is determined whether or not the channel number of n is the designated channel number of CH (step G9).

If the channel number is a designated channel number, RA
The waveform data is written to the file in M4 (step G10), and the waveform data is added to the contents of DATA and synthesized (step G11). If the STF is "0" in step G8, or if the HF is "0" in step G9, the waveform data is added to the contents of DATA and synthesized without writing the waveform data to the file. (Step G11). After synthesizing the waveform data, or when ONF (n) is "0 (mute instruction)" in step G6, the value of n is incremented (step G12).

Then, it is determined whether or not the value of n is greater than "8 (maximum number of channels)" (step G).
13). If the value of n is equal to or less than “8”, step G
Then, the process loops to step G13, and the process loop is repeated. If the value of n is greater than "8", DA
Outputs TA composite waveform data to D / A converter
(Step G14). Then, this flow ends and the process returns to the main flow.

FIG. 12 and FIG. 13 show step G in FIG.
10 is a flowchart of writing waveform data in FIG. FIG.
, It is determined whether or not the FIF is "1 (fade-in state)" (step H1). When this flag is “1”, FICF is set to “1 (operation start)”.
Is determined (step H2). When this flag is "1", the velocity of VEL, that is, the original volume value of the generated waveform data is used to determine a predetermined minimum value MIN.
Is subtracted, and the operation result is set in the register D (step H3). Then, it is determined whether or not the value of D is greater than "0" (step H4).

If the value of D is greater than "0", that is, if the original volume value of the waveform data is greater than the minimum volume value, the value of D is divided by the fade-in time, which is the value of FIT, and The operation result is set in the register d (step H5). That is, the volume change value for the unit time is set to d. Next, "0 (completion of operation)" is set in FICF (step H6). Thereafter, or if the FICF is "0" and the calculation has already been completed in step H1, it is determined whether or not the value of T has reached a predetermined time (step H7).

When the value of T has reached the predetermined time, the value of T is cleared to "0" (step H8). Next, the value of d is added to the value of the register VOL (initially the minimum value) (step H9). That is, the volume change value for the unit time is added to the VOL value as time elapses. Then, d
Then, it is determined whether or not the volume value of the VOL to which the value has been added has reached the original volume value of the VEL (step H10).

If the volume value of VOL has not reached the original volume value of VEL, that is, if it is in a fade-in state, the waveform data is written to the buffer based on the pitch of NOTE (ch) and the volume value of VOL. (Step H1
1) Return to the flow of FIG. T at step H7
If the value of has not reached the predetermined time, step H1
The process proceeds to 1 to write the waveform data to the buffer based on the pitch of NOTE (ch) and the volume value of VOL.

In step H10, when the volume value of VOL reaches the original volume value of VEL, that is, when the volume value gradually increased with time reaches the original volume value, the fade-in is terminated. Therefore, "0 (fade-in end state)" is set in the FIF (step H12). Next, the timer interrupt is prohibited (step H13), and NOTE (ch) and VEL (ch)
Is written to the buffer based on the
4) Return to the flow of FIG.

If the value of D is equal to or less than "0" in step H4, the original volume value of the waveform data at the start of recording is equal to or less than the minimum volume value, so that there is no need to perform fade-in. Therefore, in this case, "0" is set in the FIF.
Is set (step H12), the timer interrupt is prohibited (step H13), and NOTE (ch) and V
The waveform data based on EL (ch) is written into the buffer (step H14), and the process returns to the flow of FIG.

At step H1, the value of the FIF is "0".
If it is, it is determined whether or not the value of the FOF is "1 (fade-out state)" (step H15). When the value of this flag is “0”, neither the fade-in state nor the fade-out state is performed, so that normal recording is performed. Therefore, NOTE (ch) and V
The waveform data based on EL (ch) is written into the buffer (step H14), and the process returns to the flow of FIG.

If the value of the FOF is "1" at step H15, the flow goes to the flow of FIG.
It is determined whether or not CF is "1 (operation start)" (step H16). If this flag is "1",
A predetermined minimum value MIN is subtracted from the velocity of VEL, that is, the original volume value of the generated waveform data, and the result of the operation is set in the register D (step H17). Then, it is determined whether or not the value of D is greater than "0" (step H18).

If the value of D is greater than "0", that is, if the original volume value of the waveform data is greater than the minimum volume value, the value of D is divided by the fade-out time, which is the value of FOT, and the calculation is performed. The result is set in the register d (step H19). That is, the volume change value for the unit time is set to d. Next, "0 (computation end)" is set in the FOCF (step H20). Thereafter, or if the FOCF is "0" and the calculation has already been completed in step H16, it is determined whether or not the value of T has reached a predetermined time (step H21).

When the value of T has reached the predetermined time, the value of T is cleared to "0" (step H22). Next, the value of d is subtracted from the value of the register VEL (original volume value), and the result of the operation is set in the register VOL (step H).
23). That is, the volume change value per unit time is subtracted from the value of VEL as time passes. Next, it is determined whether or not the volume value of the VOL obtained by subtracting the value of d has reached the minimum volume value (step H24).

If the volume value of the VOL has not reached the minimum volume value, that is, if it is in a fade-out state, the waveform data is written to the buffer based on the pitch of the NOTE (ch) and the volume value of the VOL (step H25). ),
It returns to the flow of FIG. Even if the value of T has not reached the predetermined time in step H21, the process proceeds to step H25 to write the waveform data to the buffer based on the pitch of NOTE (ch) and the volume value of VOL. Then, the process returns to the flow of FIG.

In step H24, when the volume value of the VOL reaches the minimum volume value, that is, when the volume value gradually attenuated as time passes reaches the minimum volume value,
Since the fade-out has been completed, "0 (fade-out completed state)" is set in the FOF (step H26). Next, the timer interrupt is prohibited (step H27), and the STF is set to "0 (recording end mode)" (step H28). And FIG.
Return to the flow. If the value of D is smaller than "0" in step H18, the original volume value of the waveform data has already reached the minimum volume value at the time of the recording stop operation, so there is no need to fade out. Therefore,
The FOF is set to "0" (step H26), the timer interrupt is prohibited (step H27), and the STF is set to "0" (step H28). And FIG.
Return to the flow.

As described above, according to the first embodiment,
When storing and storing waveform data generated according to the input event data, when starting the storage, the volume value of the stored waveform data is changed from a predetermined minimum value to the original volume value at regular intervals. When the storage is completed, the volume value of the stored waveform data is gradually attenuated from the original volume value to a predetermined minimum value at regular intervals. Therefore, when the start switch and the end switch of the recording are operated, the volume control of the stored waveform data is controlled so as to be gentle, so that the waveform data generated according to the input music data is stored in the memory. When saving, no noise is recorded at the start and stop of recording.

In this case, the CPU 1 controls the operation device 6
May be set in accordance with the input from the user and the tempo of the music data. That is, in the case of music data having a fast tempo, the predetermined time for comparison with the value of the timer register T is shortened, and in the case of music data having a slow tempo, the predetermined time is lengthened. Therefore, fade-in processing and fade-out processing according to the tempo of the music data can be performed.

In the above embodiment, waveform data is generated by software, but the means for generating waveform data is not limited to software. The present invention can be applied to a case where waveform data is generated by hardware.

In each of the above embodiments, the CPU
Reference numeral 1 denotes a configuration in which the tone generation processing is performed by a program stored in the ROM 3 in advance. However, the tone generation processing program is stored in a floppy disk, a magneto-optical disk, or another storage medium, and the CPU 1 reads and executes the program. It may be configured. In this case, the invention of the storage medium is configured. Alternatively, a configuration may be adopted in which a program for the tone generation process is downloaded and executed via a communication line.

[0047]

According to the present invention, when storing and storing waveform data generated according to input event data, the volume value of the stored waveform data is set to a predetermined value when storage is started. From the minimum value to the original volume value, the volume is gradually increased at regular intervals. When the storage is completed, the volume value of the stored waveform data is gradually attenuated from the original volume value to a predetermined minimum value at regular intervals. Therefore, when the start switch and the end switch of the recording are operated, the volume control of the stored waveform data is controlled so as to be gentle, so that the waveform data generated according to the input music data is stored in the memory. When saving, no noise is recorded at the start and stop of recording.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a system configuration of a musical sound generator according to an embodiment of the present invention.

FIG. 2 is a main flowchart of a tone generation process of a CPU according to the embodiment.

FIG. 3 is a flowchart of a file creation process in FIG. 2;

FIG. 4 is a flowchart of a channel designation process in FIG. 2;

FIG. 5 is a flowchart of a recording setting process in FIG. 2;

FIG. 6 is a flowchart of a recording setting process following FIG. 5;

FIG. 7 is a view showing a recording setting screen displayed on a display unit in FIG. 2;

FIG. 8 is a flowchart of a MIDI input process in FIG. 2;

FIG. 9 is a flowchart of recording start / end processing in FIG. 2;

FIG. 10 is a flowchart of a timer interrupt.

FIG. 11 is a flowchart of a generation process in FIG. 2;

FIG. 12 is a flowchart of a waveform data writing process in FIG. 11;

FIG. 13 is a flowchart of a waveform data writing process following FIG. 12;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CPU 3 ROM 4 RAM 5 Display part 6 Operator 7 MIDI interface 8 Sequencer 9 D / A converter

Claims (5)

[Claims] 1. An input means for inputting music data composed of a plurality of event data; a waveform generating means for generating waveform data based on music data input by the input means; Operating means for inputting start information for starting the storage of the waveform data to be stored and end information for ending the storage in accordance with the operation; and when the start information is input by the operating means, the waveform data to a predetermined storage means. Storage control means for ending the storage when the end information is input by the operation means, and when the storage control means starts the storage, the volume value of the stored waveform data is From the predetermined minimum value to the original sound volume value, the sound volume value is gradually increased at regular intervals, and when the storage control means ends the storage, the sound volume value of the stored waveform data is changed. Musical tone generating apparatus characterized by comprising: a volume control means for gradually attenuated for each of the predetermined time from the volume value to said minimum value. 2. The storage control device according to claim 1, wherein the volume control unit sets an increasing period when the storage control unit starts storing according to an input from the operation unit in response to an input from the operation unit. A period setting means for setting a decay period when the means ends the storage in accordance with an input from the operation means; and the increasing period and the decay period set by the period setting means and the original volume value 2. A musical sound generating apparatus according to claim 1, further comprising: a calculating means for calculating a value that increases at every fixed time and a value that attenuates at every fixed time based on the calculation. 3. The musical tone according to claim 2, wherein the period setting unit sets the increasing interval and the attenuating interval in accordance with an input from the operation unit and a tempo of the music data. Generator. 4. The storage control unit stores the waveform data generated by the waveform generation unit in a period specified by the start information and the end information for the channel specified by the music data in the storage unit. The tone generator according to any one of claims 1 to 3, wherein: 5. An input procedure for inputting music data composed of a plurality of event data, a waveform generating procedure for generating waveform data based on the music data input by the input procedure, and a waveform generating procedure for generating the waveform data based on the input data. A setting procedure for setting start information for starting the storage of the waveform data to be stored and end information for ending the storage in accordance with an operation; and when the start information is set by the setting procedure, the waveform data to a predetermined storage means. When the end information is set by the setting procedure, a storage control procedure for ending the storage, and when the storage control procedure starts the storage, the volume value of the stored waveform data is changed. From the predetermined minimum value to the original volume value, the volume is gradually increased at regular intervals, and when the storage control procedure ends the storage, the volume value of the stored waveform data is changed. The storage medium storing the program of the tone generation processing to be executed with volume control procedure for gradually attenuated for each of the predetermined time from the volume value to said minimum value.