JP2003280654A - Device and method for envelope control - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an envelope controller, capable of performing sound volume/timbre control for every playing part while performing sound volume/timbre control individually over musical sounds of respective sounding channels constituting the playing parts, and a method therefor. <P>SOLUTION: A voice envelope waveform VV controlling musical sounds by sounding channels forming the playing parts is modified with part envelope waveforms PV controlling the musical sounds of the playing parts to generate modified envelope waveforms for every sounding channel. Then sound volumes and timbres of waveform data by the sounding channels generated according to playing information are controlled according to the modified envelope waveforms of respective corresponding sounding channels, so the sounding channels constituting the playing parts can be brought under sound volume/ timbre control by the playing parts while brought individually under sound volume/timbre control. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an envelope control device and an envelope control method suitable for use in electronic musical instruments.

[0002]

2. Description of the Related Art Electronic musical instruments are often equipped with an envelope control device for controlling the volume and tone color of a generated musical tone by multiplying waveform data generated corresponding to a pitch to be generated by an envelope waveform. An example thereof will be described with reference to FIG. FIG. 17 is a block diagram showing a schematic configuration of an envelope control device 100 mounted on a sound source of an electronic musical instrument.

In this figure, 101 is a waveform generator for generating waveform data corresponding to the pitch to be produced according to performance information such as note-on / off, and 102 is an envelope waveform for volume control according to performance information. This is the envelope generator that is generated. Reference numeral 103 denotes a multiplier that multiplies the waveform data output from the waveform generator 101 by an envelope waveform for volume control and outputs the result. These constituent elements 101 to
103 is provided for each of a plurality of sound generation channels,
The volume level of the waveform data generated by each sound generation channel is controlled according to the volume control envelope waveform generated according to the performance information.

An envelope generator 104 generates an envelope waveform for tone color control according to performance information.
Reference numeral 105 is a filter that changes the cutoff frequency according to the tone waveform envelope waveform supplied from the envelope generator 104, and performs low-pass filtering according to the cutoff frequency characteristic. According to the above configuration, the volume of the waveform data of each sound generation channel is individually controlled by the envelope generator 102, and then the tone color is controlled by the filter 105 according to the envelope waveform supplied by the envelope generator 104. In other words, all the musical tones of the tone generation channels whose volumes are individually controlled are uniformly tone-color controlled.

[0005]

By the way, in the above-mentioned conventional envelope control device 100, since all tone colors of the tone generation channels whose volumes are individually controlled are uniformly tone-color-controlled, the tone generation of each performance part is suppressed. There is a problem in that it is not possible to control the volume / timbre of each performance part while controlling the volume / timbre of each tone of the channel individually.

Therefore, the present invention has been made in view of the above circumstances, and controls the volume / timbre of each musical tone channel constituting each performance part individually, while controlling the volume / timbre of each performance part. It is an object of the present invention to provide an envelope control device and an envelope control method that can be performed.

[0007]

In order to achieve the above object, the invention according to claim 1 corresponds to a musical piece composed of a plurality of performance parts, and has a plurality of sound generation channels which can be appropriately assigned to each performance part. A device applied to a sound source, comprising parameter generating means for generating first and second parameters designating an envelope shape corresponding to a tone color of each of the performance parts, and provided for each of the tone generation channels. A first envelope generating means for generating a first envelope waveform according to a first parameter in accordance with performance information; and a second envelope provided for each of the performance parts.
A second envelope generating means for generating a second envelope waveform according to the parameter in accordance with the performance information, and a modified envelope waveform obtained by modifying the first envelope waveform with the second envelope waveform, At least one of the sound volume and the tone color of the waveform data for each tone generation channel, which is provided for each tone generation channel and is generated according to the performance information, is generated for each tone generation channel. And a waveform control means for controlling according to the modified envelope waveform.

According to a second aspect of the present invention, a method of applying to a sound source having a plurality of sounding channels which can correspond to a musical piece composed of a plurality of performance parts and can be appropriately assigned to each performance part, and designates an envelope shape. Parameter generation process for generating the first and second parameters corresponding to the tone color of each performance part, and a first envelope waveform according to the first parameter, which is performed for each tone generation channel. A first envelope generation process that is generated according to performance information, and a second envelope generation that is performed for each performance part and that generates a second envelope waveform according to the second parameter according to performance information. And a modified envelope waveform obtained by modifying the first envelope waveform with the second envelope waveform. Control process for each tone generation channel, and at least one of the volume and timbre of the waveform data that is generated for each tone generation channel and is generated according to the performance information is controlled according to the modified envelope waveform of the corresponding tone generation channel. And a waveform control process.

According to a third aspect of the present invention, there is provided a device which corresponds to a musical piece composed of a plurality of performance parts and which is applied to a sound source having a plurality of sound generation channels which can be appropriately assigned to each performance part, and specifies an envelope shape. Parameter generating means for generating the first and second parameters corresponding to the tone color of each performance part, and the first envelope waveform according to the first parameter, which is provided for each tone generation channel. First envelope generating means that is generated according to performance information, and provided for each performance part,
Second envelope generating means for generating a second envelope waveform according to the second parameter according to performance information, and designation for designating a degree of correlation between the second envelope waveform and the first envelope waveform Means for modifying the first envelope waveform according to the second envelope waveform according to the degree of correlation specified by the specifying means, and the modifying means for generating a modified envelope waveform for each sound generation channel. And a waveform which is provided for each of the sounding channels and controls at least one of the volume and the timbre of the waveform data for each sounding channel generated according to the performance information according to the modified envelope waveform of the corresponding sounding channel. And a control means.

According to a fourth aspect of the present invention, there is provided a method for applying to a sound source having a plurality of sounding channels which can be appropriately assigned to each musical performance part, corresponding to a musical piece composed of a plurality of musical performance parts. Parameter generation process for generating the first and second parameters corresponding to the tone color of each performance part, and a first envelope waveform according to the first parameter, which is performed for each tone generation channel. A first envelope generation process that is generated according to performance information, and a second envelope generation that is performed for each of the performance parts and that generates a second envelope waveform according to the second parameter according to performance information. A process, a designating process for designating a degree of correlation between the second envelope waveform and the first envelope waveform, and a phase designated in the designating process. According to the second envelope waveform, a modifying envelope waveform, which is obtained by modifying the first envelope waveform according to the second envelope waveform, is generated for each of the sounding channels, and performed for each of the sounding channels. And a waveform control process for controlling at least one of the volume and the timbre of the waveform data for each sound generation channel generated according to the information according to the modified envelope waveform of the corresponding sound generation channel.

According to a fifth aspect of the present invention, which depends on either the first aspect or the third aspect, the second envelope generating means outputs the second envelope waveform according to the second parameter to the performance part. It is characterized in that it is generated in synchronization with the first note-on event in and is terminated in synchronization with the last note-off event.

In the invention according to claim 6 which depends on either claim 2 or claim 4, in the second envelope generating step, the second envelope waveform according to the second parameter is generated as a performance part. It is characterized in that it is generated in synchronization with the first note-on event in and is terminated in synchronization with the last note-off event.

In the invention according to claim 7 which depends on either claim 1 or claim 3, the second envelope generating means outputs the second envelope waveform according to the second parameter to the performance part. It is characterized in that it is generated when the number of sounding channels being sounded reaches a predetermined value, and terminated when the number of sounding channels being muted reaches a predetermined value.

In the invention according to claim 8 which is dependent on either claim 2 or claim 4, the second envelope generating step produces a second envelope waveform according to the second parameter as a performance part. It is characterized in that it is generated when the number of sounding channels being sounded reaches a predetermined value, and terminated when the number of sounding channels being muted reaches a predetermined value.

In the invention according to claim 9 subordinate to either claim 1 or claim 3, when the second envelope generating means corresponds to a performance part to which a keyboard operation is assigned, the second envelope generating means The second envelope waveform according to the parameter is generated at the time when the key is pressed with a velocity exceeding a predetermined value, and is terminated at the time when the pressed key is released.

In the invention according to claim 10 which depends on either claim 2 or claim 4, when the second envelope generating process corresponds to a performance part to which a keyboard operation is assigned, the second envelope generating process is performed. The second envelope waveform according to the parameter is generated at the time when the key is pressed with a velocity exceeding a predetermined value, and is terminated at the time when the pressed key is released.

According to the present invention, the second envelope waveform for controlling the musical tone of the performance part modifies the first envelope waveform for controlling the musical tone of each tone generation channel forming the performance part, and the first envelope waveform for each tone generation channel is modified. Generate a modified envelope waveform. Then, since the volume / timbre of the waveform data of each sound generation channel generated according to the performance information is controlled according to the modified envelope waveform of the corresponding sound generation channel, the musical sound of each sound generation channel constituting the performance part is controlled. It is possible to control the volume / timbre for each performance part while individually controlling the volume / timbre.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The envelope control device and the envelope control method according to the present invention can be applied not only to a well-known electronic musical instrument but also to a so-called DTM device using a personal computer. Hereinafter, an electronic musical instrument according to an embodiment of the present invention will be described as an example, which will be described with reference to the drawings.

A. Configuration (1) Overall Configuration FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In the figure, reference numeral 1 denotes a MIDI interface unit, which is controlled by an external MIDI under the control of a CPU 4 described later.
RAM6 by receiving MIDI data supplied from the musical instrument
To the buffer area BE. Reference numeral 2 is a keyboard section for generating performance information such as note on / off corresponding to a key pressing operation. Reference numeral 3 denotes an operation unit including various switches arranged on a musical instrument panel (not shown), and generates a switch event according to various switch operations.

The CPU 4 controls each part of the musical instrument in accordance with a musical tone parameter corresponding to performance information supplied from the keyboard section 2 and a switch event supplied from the operation section 2. The processing operation of the CPU 4 according to the gist of the present invention will be described later in detail. A ROM 5 stores various control programs loaded by the CPU 4 and envelope parameters corresponding to various timbres. The envelope parameters are data used for envelope control performed by the sound source 7 (described later), and include a voice envelope parameter VEP and a part envelope parameter P described later.
It is composed of an EP and a modification value m.

Reference numeral 6 is a RAM having a work area WE, a parameter area PE and a buffer area BE.
Various register / flag data used for the processing of the CPU 4 is temporarily stored in the work area WE. In the parameter area PE, the CPU 4 is responsive to the tone color selection operation by the user.
The envelope parameters of the designated tone color read out from the ROM 5 are temporarily stored. MI in the buffer area BE
The MIDI data received via the DI interface unit 1 is temporarily stored.

Reference numeral 7 is a sound source which is constituted by a well-known waveform memory reading method and which generates musical tone data according to musical tone parameters (performance information and envelope parameters) supplied from the CPU 4, the constitution of which will be described later.
Reference numeral 8 is a sound system in which the musical tone data output from the sound source 7 is converted into an analog musical tone signal, filtered as necessary to remove noise or add an effect, and then amplified and emitted from a speaker. Is.

(2) Configuration of Sound Source 7 Next, the configuration of the sound source 7 will be described with reference to FIGS. The sound source 7 has m performance parts formed from n sound generation channels, and has simultaneous sound generation channels for m × n tones. It should be noted that the number of performance parts may be configured to increase or decrease in accordance with the music to be played, instead of a fixed value,
Also, the number of sound generation channels of each performance part may be configured to sequentially secure empty channels instead of a fixed value. By adopting the dynamic assign method in this way, it becomes possible to effectively utilize the sound generation channel. In order to simplify the description, the configuration of the sound source 7 will be described below based on the relationship between one performance part (hereinafter referred to as a part) and a corresponding sounding channel (hereinafter referred to as a voice).

As shown in FIG. 2, the sound source 7 is composed of a voice controller 70 and a part controller 71. The voice control unit 70 is composed of a plurality of voices assigned to one part, and one voice is composed of components 70a to 70e. Reference numeral 70a is a waveform generator that generates waveform data corresponding to the pitch to be generated. Reference numeral 70b is a voice envelope generator that generates an envelope waveform for volume control according to performance information such as note on / off.

Reference numeral 70c is a multiplier which multiplies the waveform data output from the waveform generator 70a by the volume envelope waveform and outputs the product. Here, the volume envelope waveform is
The envelope waveform generated by the voice envelope generator 70b is modified by the envelope waveform generated by the part envelope generator 71a described later,
This will be described later in detail. Reference numeral 70d is a voice envelope generator that generates an envelope waveform for controlling a tone color according to performance information. Reference numeral 70e is a filter that low-pass filters the waveform data output from the multiplier 70c with a cutoff characteristic according to the tone color envelope waveform. Here, the timbre envelope waveform is a waveform obtained by modifying the envelope waveform generated by the voice envelope generator 70d with the envelope waveform generated by the part envelope generator 71b described later, which will be described later in detail. Reference numeral 70f is an adder for adding waveform data output from each voice to generate a part output.

The part control unit 71 is composed of part envelope generators 71a and 71b. The part envelope generator 71a generates an envelope waveform for modifying the envelope waveform for volume control generated by the voice envelope generator 70b according to performance information such as note on / off. On the other hand, the part envelope generator 71b generates an envelope waveform for modifying the tone color control envelope waveform generated by the voice envelope generator 70d according to the performance information.

The voice envelope generator 70 described above.
b, 70d and part envelope generators 71a, 7
1b is configured to perform well-known ADSR type envelope control. Here, with reference to the functional blocks shown in FIG. 3, the relationship between the volume envelope controlling voice envelope generator 70b and the part envelope generator 71a and the tone envelope controlling voice envelope generator 70.
The relationship between d and the part envelope generator 71b will be described. In this figure, the same parts as those shown in FIG. 2 are designated by the same reference numerals.

In FIG. 3, reference numeral 72 is a voice EG corresponding to the voice envelope generators 70b and 70d. The voice EG 72 generates a voice envelope waveform VV according to the performance information PD according to the voice envelope parameter VEP supplied from the CPU 4. The voice envelope parameter VEP is RA depending on the tone color selection.
The data is stored in the parameter area PE of M6 and specifies the shape of the voice envelope waveform VV. Note that the performance information PD referred to here is a note-on / off event generated by a key press operation on the keyboard unit 2 or an MID input via the MIDI interface unit 1.
Indicates a note on / off event in the I data.

73 is a part envelope generator 71a,
It is a part EG corresponding to 71b. This part EG7
Similarly to the voice EG 72, 3 also generates a part envelope waveform PV according to the performance information PD according to the part envelope parameter PEP supplied from the CPU 4. The part envelope parameter PEP is data stored in the parameter area PE of the RAM 6 according to the tone color selection, and specifies the shape of the part envelope waveform PV.

Reference numeral 74 is an arithmetic unit embodied by the processing operation of the CPU 4. The calculation unit 74 modifies the voice envelope waveform VV according to the part envelope waveform PV and the modification value m. The modification value m is a value representing the degree of correlation between the part envelope waveform PV and the voice envelope waveform VV. Modify value m
May be set in advance for each timbre and may be read from the parameter area PE of the RAM 6 in accordance with the timbre selection, or may be designated by a user input, similarly to the envelope parameter.

As shown in FIG. 4, the calculation section 74 includes a multiplier 74a for multiplying the part envelope waveform PV by the modification value m, and a subtractor 74b for subtracting the modification value m from the normalized value "1". It is composed of an adder 74c for adding the output of the multiplier 74a and the output of the subtractor 74b, and a multiplier 74d for multiplying the voice envelope waveform VV by the output of the adder 74c. When the normalized inputs PV, VV and m are given to the arithmetic unit 74 having such a configuration, as a result of modifying the voice envelope waveform VV according to the part envelope waveform PV and the modification value m, VV ((1-m ) + M · PV) output m
V is generated.

The output mV generated by the arithmetic unit 74 is input to the multiplier 70c and the filter 70e. Multiplier 70
When input to c, the output mV is treated as the above-mentioned volume envelope waveform, and is multiplied by the waveform data output from the waveform generator 70 to control the volume. On the other hand, when input to the filter 70e, the output mV is treated as the aforementioned tone color envelope waveform, and the tone color control is performed on the waveform-controlled waveform data by low-pass filtering according to the cutoff characteristic according to the output mV. Therefore, in the sound source 7 having the above-described configuration, it is possible to control the volume / timbre of each part while controlling the volume / timbre of each musical tone of each voice that composes the part.

B. Operation Next, the operation of the embodiment will be described with reference to FIGS. In the following, first, an outline of the main routine will be described as an overall operation, and then the operations of various processing routines called from the main routine will be described.

(1) Operation of Main Routine (Overall Operation) First, when the power source is turned on in this embodiment, the CPU 4 is in the ROM.
5, a predetermined control program is loaded, the main routine shown in FIG. 5 is executed, and the process proceeds to step SA1.
Initialization processing for resetting various registers / flags stored in the work area WE of the RAM 6 and setting initial values is performed. Next, in step SA2, processing according to operation of various switches arranged on the instrument panel surface,
For example, a panel switch process for performing a tone color setting by a tone color switch is executed.

After the switch processing is completed, the CPU 4 advances the processing to step SA3, where a note-on / off event corresponding to a key press operation of the keyboard section 2 or a note in MIDI data input via the MIDI interface section 1 is performed. While instructing sound generation / silence based on an on / off event, performance information PD or M corresponding to this key release operation
A sound source process for controlling the volume / tone color of the generated musical tone is executed based on the IDI data. Next, in step SA4, other processes such as an effect adding process for adding an effect to the generated musical sound according to the set effect mode are executed. After that, steps SA2 to SA4 are performed until the power is turned off.
Repeat to create a musical sound.

(2) Operation of Panel Switch Processing Routine Next, the operation of the panel switch processing routine will be described with reference to FIG. Here, the operation corresponding to the operation of the tone color switch according to the gist of the present invention will be referred to. When this routine is executed through step SA2 described above,
The CPU 4 proceeds to step SB1 to determine whether the tone color switch has been operated. When the tone color switch is not operated, the determination result is "NO", the flow proceeds to step SB6 to execute other switch processing, and then this routine is completed.

On the other hand, when the timbre switch is operated, the result of the determination in step SB1 is "YES", and step S
In step B2, the sound source 7 is instructed to read the waveform data of the tone color selected by operating the tone color switch. Next, in steps SB3 to SB5, the envelope parameters (voice envelope parameter VEP, part envelope parameter PEP and modification value m) corresponding to the tone color selected by operating the tone color switch are read from the ROM 5 and the parameter area P of the RAM 6 is read.
Store at E. After this, the process proceeds to step SB6 described above. The voice envelope parameter VE
P and the part envelope parameter PEP are, for example, as shown in FIG. 7, when performing well-known ADSR type envelope control, initial level IL, attack rate AR, attack level AL, decay rate DR, sustain level SL and Release rate RR
Consists of.

(3) Operation of Sound Source Processing Routine Next, the operation of the sound source processing routine will be described with reference to FIG. When this routine is executed through step SA3 (see FIG. 5) described above, the CPU 4 executes step SC1.
Then, a MIDI / keyboard input process for instructing sounding / silence is executed based on a key-on / off event corresponding to a key pressing operation of the keyboard section 2 or MIDI data input via the MIDI interface section 1, and continues. At step SC2, an envelope process for controlling the volume / tone color of the generated musical tone is executed based on the performance information PD or MIDI data corresponding to the key depression / release operation, and this routine is completed.

(4) Operation of MIDI / keyboard input processing routine When this routine shown in FIG. 9 is executed through step SC1, it is determined in steps SD1 and SD2 whether there is a new note-on event or note-off event. To do. The operation will be described below separately for the case where a new note-on event is detected and the case where a new note-off event is detected.

When a new note-on event is detected When a new note-on event is detected, step SD
The result of determination 1 is "YES", and the process proceeds to step SD3. In step SD3, a tone generation assigning process for assigning a tone to the tone generation channel (voice) of the part to which the detected note-on event is assigned is executed. In this pronunciation assignment process, for example, when there is no vacant pronunciation channel, the new pronunciation is assigned to the pronunciation channel generating the musical sound of the most attenuated envelope level, or the oldest released channel. For example, a new pronunciation is assigned to, and the pronunciation is assigned by a well-known truncation method. When the pronunciation assignment is completed, CPU4
Advances the processing to step SD4, increments the register Vn (P) holding the note-on number (pronunciation number) of the part number P, and advances, and in the subsequent step SD5, the new pronunciation is assigned in the above step SD3. After instructing the voice control unit 70 to generate waveform data corresponding to the note number included in the note-on event, this routine is completed.

When a new note-off event is detected When a new note-off event is detected, step SD
The determination result of 2 is "YES", and the process proceeds to step SD6. In step SD6, the register Vn (P) holding the note-on number of the part number P to which the detected note-on event is assigned is decremented. Next, in step SD7, the voice control unit 70, which is producing the waveform data corresponding to the note number included in the detected note-off event, is instructed to mute (note-off event is considered in consideration of decay time after note-off). It is preferable to stop the generation of the waveform data after a predetermined time from the detection), and then this routine is completed.

(5) Operation of Envelope Processing Routine Next, the operation of the envelope processing routine will be described with reference to FIGS. Step SC2 described above
When this routine is executed via (see FIG. 8), CP
U4 is step SE1, SE2, SE3 shown in FIG.
At each step of 0 and SE31, it is determined whether it is a new note-on event, whether it is a new note-off event, whether it is during a note-on event, or whether it is during a note-off event. to decide. Then, if it is in an idle state waiting for an event that does not match any of the states, the above steps SE1, SE2, SE30, SE31
Each of the judgment results is “NO”, and this routine is completed without any processing. On the other hand, if it is not in the idle state, the process according to the detected state is executed. The operation in each state when a new note-on event is detected, when a new note-off event is detected, during a note-on event, and during a note-off event will be described below.

When a new note-on event is detected In this case, the determination result of step SE1 is "YES", and the process proceeds to step SE3 where the value of the register Vn (P) holding the note-on number of part number P is " 1 ”, that is, it is the first note-on event in the part with the part number P. If it is not the first note-on event, the determination result is “NO”, and the process proceeds to step SE6 described later. However, if it is the first note-on event, the determination result is “YES” and the process proceeds to step SE4. .

At step SE4, of the part envelope parameters PEP corresponding to the set tone color, the initial level IL, the attack rate AR and the attack level AL are read from the parameter area PE of the RAM 6 and the part envelope generator 71a, 71a, 71
In step SE5, the start of generation of the part envelope waveform PV is instructed. As a result, the sound source 7
In the part envelope generators 71a and 71b, the part envelope waveform PV up to the attack area is generated according to the given part envelope parameter PEP.

Next, at step SE6, of the voice envelope parameters VEP corresponding to the set tone color, the initial level IL, the attack rate AR and the attack level AL are set in the parameter area PE of the RAM6.
Read from the voice source 7 voice envelope generator 70
Then, in step SE7, the generation of the voice envelope waveform VV is instructed. Thereby, the voice envelope generators 70b and 70d of the sound source 7
Then, given the voice envelope parameter VEP
According to the voice envelope waveform V up to the attack area
V is generated.

Thus, the part envelope generator 71
a, 71b and voice envelope generators 70b, 7
When 0d starts to generate the part envelope waveform PV and the voice envelope waveform VV, respectively, the CPU 4 proceeds to step SE8, and the voice envelope waveform V according to the part envelope waveform PV and the modification value m.
The calculation processing (see FIG. 4) for modifying V is executed, and VV
An output mV of ((1-m) + m · PV) is generated. Next, in step SE9, the generated output mV is supplied to the multiplier 70c and the filter 70e, and a waveform control process for controlling the volume and timbre of the waveform data generated in response to the note-on event is executed.

Subsequently, in step SE10 shown in FIG. 11, it is determined whether or not the part envelope waveform PV has reached the target level. If the target level has not been reached, the determination result is "NO", and step SE described later is executed.
The process proceeds to 17, but if the target level is reached, the determination result is “YES” and the process proceeds to step SE11. In step SE11, the register PES for temporarily storing the part envelope step value of the part number P
It is determined whether the value of (P) is "0". The part envelope step value is a value indicating the state of the part envelope waveform PV, "0" is an off state, "1" is an attack state, "2" is a decay state, "3" is a sustain state, and "4". Indicates the released state. Therefore, in this step SE11, it is determined whether or not the part envelope waveform PV has reached the off state.

When the part envelope waveform PV reaches the off state, the result of the judgment at step SE11 is "YE."
S ”, the process proceeds to step SE16, where the part envelope generators 71a and 71b are instructed to stop the waveform generation, and this routine is completed. On the other hand, if the part envelope waveform PV has not reached the off state, the determination result is “N
"O" and the process proceeds to step SE12. Step SE1
At 2, it is determined whether or not the value of the register PES (P) has reached "4 (release state)". Then, when the release state is reached, the determination result is "YES", the flow proceeds to the next step SE13, the value of the register PES (P) is updated to "0" to indicate that it is in the off state.

On the other hand, if "4 (release state)" has not been reached, the determination result is "NO", the flow proceeds to step SE14, where the value of the register PES (P) is incremented and updated to the next state. . When the waveform state is updated in this way, the CPU 4 proceeds to step SE15 to read a new part envelope parameter PEP from the parameter area PE of the RAM 6 in accordance with the updated value of the register PEP (P) to extract the part of the sound source 7. It is sent to the envelope generators 71a and 71b.

Next, in step SE17, it is determined whether or not the voice envelope waveform VV has reached the target level. When the target level is not reached, the determination result is "NO", and this routine is once completed. On the other hand, when the target level is reached, the determination result is “YES”, the flow proceeds to step SE18, and the register ES for temporarily storing the voice envelope step value of the part number P is used.
It is determined whether the value of (PX) is "0 (off state)".
When the voice envelope waveform VV reaches the off state, the determination result is “YES”, and the processing proceeds to step SE23,
After instructing the voice envelope generators 70b and 70d to stop the waveform generation, in step SE24, a channel opening process for setting the corresponding voice (sound generation channel) to an empty channel is executed, and then this routine is completed.

On the other hand, the voice envelope waveform PV
Is not in the off state, the above step SE18
The result of the determination is "NO", and the process proceeds to step SE19. In step SE19, it is determined whether or not the value of the register ES (PX) has reached "4 (release state)".
If the release state has been reached, the determination result is “YES”, the flow proceeds to the next Step SE20, and the register ES (P
The value of X) is updated to "0" to indicate that it is in the off state.
On the other hand, if the release state has not been reached, the determination result is “NO”, the flow proceeds to step SE21, and the register E
The value of S (PX) is incremented and updated to the next state. Next, in step SE22, a new voice envelope parameter VEP is read from the parameter area PE of the RAM 6 according to the updated value of the register PEP (PX) and sent to the voice envelope generators 70b and 70d of the sound source 7, This routine is once completed.

When a new note-off event is detected In this case, the determination result of step SE2 shown in FIG. 10 is "YES", and the process proceeds to step SE25 to register Vn (P) for holding the note-on number of part number P. Value is "0", that is, it is the last note-off event in the part with the part number P. If it is not the last note-off event, the judgment result is "N
O ”, and the process proceeds to step SE28 described later. On the other hand, if it is the last note-off event, the determination result is "YES", the process proceeds to step SE26, and "4" is set in the register PES (P) for temporarily storing the part envelope step value of the part number P. Indicates that it is in the released state. Then, step SE2
7, the part envelope parameter PEP for forming the released part envelope waveform PV,
That is, the release rate RR and the release level 0 are sent to the part envelope generators 71a and 71b of the sound source 7.

Subsequently, at step SE28, "4" is set in the register ES (PX) for temporarily storing the voice envelope step value of the part number P to indicate that the release state is set. Then, in step SE29, the voice envelope parameter VEP for forming the released voice envelope waveform VV, that is, the release rate RR and the release level 0 is sent to the voice envelope generators 70b and 70d of the sound source 7. After that, the processing proceeds to step SE8 and subsequent steps, and the voice envelope waveform VV is modified according to the part envelope waveform PV and the modification value m to obtain VV ((1-
m) + m · PV), an output mV is generated and supplied to the multiplier 70c and the filter 70e to control the volume / timbre of the waveform data released in response to the note-off event. When the part envelope waveform PV and the voice envelope waveform VV are turned off, the stop instructions are given to the part envelope generators 71a and 71b, while the voice envelope generators 70b and 7b are stopped.
A stop instruction is also given to 0d to set the corresponding voice to an empty channel, and this routine is completed.

During the note-on event During the note-on event, since the value of the register Vn (P) holding the note-on number of the part number P is not "0", the determination in step SE30 shown in FIG. 10 is made. The result is "YES", and the processing is advanced to the step SE8 and thereafter, and the voice envelope waveform VV is modified in accordance with the part envelope waveform PV and the modification value m to output VV ((1-m) + m · PV) output mV. Produces
This is supplied to the multiplier 70c and the filter 70e to control the volume / timbre of the waveform data. Then, while performing such volume / tone control, the part envelope waveform PV
And the voice envelope waveform VV is supplied to the sound source 7 with a part envelope parameter PEP and a voice envelope parameter VEP which specify a new rate / level each time the voice envelope waveform VV changes.
Form VV.

During the note-off event If the note-off event is in progress (the last note-off event in the part of part number P has occurred and its voice envelope waveform is in the release state), the voice envelope of part number P is generated. Since the value of the register ES (PX) that temporarily stores the step value is "4 (release state)", the determination result of step SE31 shown in FIG.
S ”, and the processing is advanced to the step SE8 and subsequent steps, and the voice envelope waveform VV is modified according to the part envelope waveform PV and the modification value m to obtain VV.
An output mV ((1-m) + m · PV) is generated and supplied to the multiplier 70c and the filter 70e to control the volume / timbre of the waveform data released in response to the note-off event. Then, the part envelope waveform P
V and the voice envelope waveform VV are turned off, the part envelope generators 71a and 71b are generated.
While giving a stop instruction to the voice envelope generator 7
A stop instruction is also given to 0b and 70d to set the corresponding voice to an empty channel, and this routine is completed.

(6) Concrete operation Next, step S of the envelope processing routine described above.
An example of a specific operation of the arithmetic processing executed in E8 will be described with reference to FIGS. Here, the initial level IL, the attack rate AR, the attack level AL, the decay rate DR, and the sustain level SL.
And the part envelope generator 7 according to the part envelope parameter PEP consisting of the release rate RR.
1a and 71b generate the part envelope waveform PV shown in FIG. 12, while the voice envelope generators 70b and 70d have initial levels IL, attack rate AR, attack level AL and release rate RR for the sake of simplification of description. It is assumed that the voice envelope waveform VV shown in FIG. 13 is generated according to the voice envelope parameter VEP consisting of The voice envelope waveform VV shown in FIG. 13 is assumed to be a case where five notes are played legato in a certain part.

Now, when the part envelope waveform PV and the voice envelope waveform VV shown in FIGS. 12 and 13 are generated, in step SE8 described above, V
An output mV of V ((1-m) + m · PV) is calculated.
Here, when the modification value m is "0", that is, when the correlation between the part envelope waveform PV and the voice envelope waveform VV is zero, the voice envelope waveform V
V is not modified to the part envelope waveform PV, and
As shown in the figure, the output becomes mV as it is.

Next, when the modification value m is "0.5", that is, when the correlation between the part envelope waveform PV and the voice envelope waveform VV is 50%, (VV / 2 + VV) as shown in FIG.・ PV / 2) output m
V is formed. Furthermore, the modification value m is "1",
That is, when the correlation between the part envelope waveform PV and the voice envelope waveform VV is 100%, the output mV of (VV · PV) is formed as shown in FIG. Since such an output mV is supplied to the multiplier 70c and the filter 70e of each voice in each part to individually control the volume / timbre, the musical tones of each sounding channel forming the performance part are individually volume / volume controlled. It is possible to control the volume / timbre for each performance part while controlling the timbre.

In the present embodiment, the ADSR type envelope control has been described as an example, but the gist of the present invention is not limited to this, and naturally other types of envelope control can be applied. Further, the present invention is not limited to the volume / timbre control, and, for example, the effect type given to each musical performance part can be changed while the effect type given to the musical tone of each sounding channel is changed. It is also possible to arrange and apply the configuration to be given.

Further, in the above-mentioned embodiment, the part envelope waveform PV is generated in synchronization with the first note-on event in the part, and the part envelope waveform PV is terminated in synchronization with the last note-off event. However, not limited to this, for example, the part envelope waveform PV is generated when the number of note-ons (number of sounds) in a part reaches a predetermined value, and the part envelope waveform PV is generated when the number of note-offs (number of silences) reaches a predetermined value. The waveform PV may be terminated. In this way, for example, the form of volume / timbre control can be made different between the legato playing method that continues a series of sounds smoothly and the staccato playing method that separates one note at a time, so that rich performance expression power can be realized. Become.

Further, when the envelope control device according to the present invention is applied to an electronic musical instrument having a structure for detecting a key touch, the part assigned to the keyboard operation is pressed with a velocity (or touch level) exceeding a predetermined value. It is also possible to generate the part envelope waveform PV at that time and terminate the part envelope waveform PV at the time when the depressed key is released. This makes it possible to perform different volume / timbre control for musical tones with a strong touch and musical tones with a weak touch in the part to be played on the keyboard, and to improve performance expressiveness.

[0062]

According to the first and second aspects of the present invention, the first envelope waveform for controlling the musical tone of the performance part is used to control the musical tone of each tone generation channel forming the performance part. The envelope waveform is modified to generate a modified envelope waveform for each sounding channel.
Then, since the volume and tone color of the waveform data for each sound generation channel generated according to the performance information are controlled according to the modified envelope waveform of the corresponding sound generation channel, the musical sound of each sound generation channel constituting the performance part is controlled. It is possible to control the volume / timbre for each performance part while controlling the volume / timbre individually. According to the third and fourth aspects of the invention, the first envelope waveform is modified according to the second envelope waveform in accordance with the designated degree of correlation, and the modified envelope waveform for each sounding channel is generated. Then, since the volume and tone color of the waveform data for each tone generation channel generated according to the performance information are controlled according to the modified envelope waveform of the corresponding tone generation channel, the degree of volume / tone color control of the performance part, It is possible to adjust the degree of volume / timbre control of each tone generation channel of the performance part. According to the fifth and sixth aspects of the present invention, the second envelope waveform for controlling the musical sound of the performance part is generated in synchronization with the first note-on event in the performance part and in synchronization with the last note-off event. The musical tone of the performance part can be controlled while the event is occurring in each sound generation channel. According to the invention described in claims 7 and 8, the second envelope waveform for controlling the musical sound of the performance part is generated when the number of sounding channels being sounded in the performance part reaches a predetermined value, and the sound is muted. Since it is terminated when the number of sounding channels that are playing reaches a predetermined value, for example, a legato playing method that continues a series of sounds smoothly,
The form of volume / timbre control can be different depending on the staccato playing method in which each note is separated, and a rich performance expression can be realized. According to the invention described in claims 9 and 10, the second envelope waveform for controlling the musical sound of the performance part is
It is generated when a key with a velocity exceeding the specified value is pressed, and it ends when the key is released.Therefore, different volume / timbre control can be performed for a tone with a strong touch and a tone with a weak touch. It becomes possible and the performance expression performance can be improved.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing a schematic configuration of a sound source 7.

FIG. 3 is a block diagram showing a functional configuration of a sound source 7.

FIG. 4 is a block diagram showing a configuration of a calculation unit 74.

FIG. 5 is a flowchart showing an operation of a main routine.

FIG. 6 is a flowchart showing an operation of a panel switch processing routine.

FIG. 7 is a diagram showing an example of envelope parameters.

FIG. 8 is a flowchart showing an operation of a sound source processing routine.

FIG. 9 is a flowchart showing the operation of a MIDI / keyboard input processing routine.

FIG. 10 is a flowchart showing the operation of an envelope processing routine.

FIG. 11 is a flowchart showing the operation of an envelope processing routine.

FIG. 12 is a diagram showing an example of a part envelope waveform PV.

FIG. 13 is a diagram showing an example of a voice envelope waveform VV.

FIG. 14 is a diagram showing an output mV generated when the modification value m is “0”.

FIG. 15 is a diagram showing an output mV generated when the modification value m is “0.5”.

FIG. 16 is a diagram showing an output mV generated when the modification value m is “1”.

FIG. 17 is a block diagram showing a configuration of a conventional example.

[Explanation of symbols]

1 MIDI interface section 2 keyboard section 3 operation part 4 CPU 5 ROM 6 RAM 7 sound sources 8 sound system 70 Voice control unit 70a Waveform generator 70b Voice Envelope Generator 70c multiplier 70d voice envelope generator 70e filter 70f adder 71 Part control unit 71a, 71b Part envelope generator 71a 72 Voice EG 73 Part EG 74 Operation unit

Claims (10)

[Claims] 1. A device for applying to a sound source having a plurality of sound generation channels, which corresponds to a musical piece composed of a plurality of performance parts and can be appropriately assigned to each performance part, and which is provided with a first and a second envelope designating envelope shapes. Parameter generating means for generating a parameter corresponding to the tone color of each performance part, and a first envelope waveform provided for each tone generation channel according to the first parameter according to the performance information. A first envelope generating means, a second envelope generating means provided for each of the performance parts and generating a second envelope waveform according to the second parameter in accordance with performance information; A modified envelope waveform obtained by modifying the first envelope waveform with an envelope waveform is generated for each sound generation channel. At least one of the volume and the tone color of the waveform data for each tone generation channel, which is provided for each tone generation channel and is generated according to the performance information, according to the modified envelope waveform of the corresponding tone generation channel. And a waveform control means for controlling the envelope. 2. A method of applying to a sound source having a plurality of sound generation channels, which corresponds to a musical piece composed of a plurality of performance parts and can be appropriately assigned to each performance part, and which comprises first and second envelope shape designations. A parameter generating process for generating a parameter corresponding to the tone color of each performance part, and a first envelope waveform according to the first parameter, which is performed for each tone generation channel, according to the performance information. A first envelope generating step; a second envelope generating step which is performed for each of the performance parts and generates a second envelope waveform according to the second parameter in accordance with performance information; Modification for generating a modified envelope waveform obtained by modifying the first envelope waveform with an envelope waveform for each of the sound generation channels. And a waveform control process for controlling at least one of the volume and timbre of the waveform data generated according to the performance information, which is performed for each of the sounding channels according to the modified envelope waveform of the corresponding sounding channel. An envelope control method comprising: 3. An apparatus for applying to a sound source having a plurality of tone generation channels, each of which corresponds to a musical piece composed of a plurality of performance parts and can be appropriately assigned to each performance part, wherein the first and second means specify an envelope shape. Parameter generating means for generating a parameter corresponding to the tone color of each performance part, and a first envelope waveform provided for each tone generation channel according to the first parameter according to the performance information. A first envelope generating means, a second envelope generating means provided for each of the performance parts and generating a second envelope waveform according to the second parameter in accordance with performance information; In accordance with the designating means for designating the degree of correlation between the envelope waveform and the first envelope waveform, The second
Modifying means for generating, for each of the sounding channels, a modified envelope waveform obtained by modifying the first envelope waveform in accordance with the envelope waveform of And a waveform control means for controlling at least one of the volume and timbre of the waveform data for each sounding channel according to the modified envelope waveform of the corresponding sounding channel. 4. A method of applying to a sound source having a plurality of sound generation channels, which correspond to a musical piece composed of a plurality of performance parts and can be appropriately assigned to each performance part, and which are the first and second methods for designating an envelope shape. A parameter generating process for generating a parameter corresponding to the tone color of each performance part, and a first envelope waveform according to the first parameter, which is performed for each tone generation channel, according to the performance information. A first envelope generating step; a second envelope generating step which is performed for each of the performance parts and generates a second envelope waveform according to the second parameter in accordance with performance information; According to a designating step of designating a degree of correlation between an envelope waveform and the first envelope waveform, and the degree of correlation designated in the designating step,
A modification envelope waveform obtained by modifying the first envelope waveform in accordance with the envelope waveform of each of the sound generation channels, and a modification process performed for each of the sound generation channels and generated according to performance information. And a waveform control process for controlling at least one of the volume and the tone color of the waveform data for each sounding channel according to the modified envelope waveform of the corresponding sounding channel. 5. The second envelope generating means generates a second envelope waveform according to the second parameter in synchronization with the first note-on event in the performance part, and outputs the second note-off event in the last note-off event. The envelope control device according to claim 1 or 3, wherein the envelope control device is terminated in synchronization. 6. The second envelope generating step generates a second envelope waveform according to the second parameter in synchronization with a first note-on event in a performance part, and generates a second note-off event. The envelope control method according to claim 2 or 4, wherein the termination is performed in synchronization. 7. The second envelope generating means generates a second envelope waveform according to the second parameter when the number of sounding channels being sounded in a performance part reaches a predetermined value. 4. The envelope control device according to claim 1, wherein the envelope control device is terminated when the number of muted sound generation channels reaches a predetermined value. 8. The second envelope generating step generates a second envelope waveform according to the second parameter when the number of sounding channels being sounded in the performance part reaches a predetermined value. 5. The envelope control method according to claim 2, wherein the method is terminated when the number of muted sound generation channels reaches a predetermined value. 9. The second envelope generating means, when a keyboard operation corresponds to a performance part to which a keyboard operation is assigned, outputs a second envelope waveform according to the second parameter.
The envelope according to claim 1 or 3, wherein the envelope is generated when a key having a velocity exceeding a predetermined value is pressed, and is terminated when the key is released. Control device. 10. The second envelope generation process comprises:
When the keyboard operation corresponds to the assigned performance part, a second envelope waveform according to the second parameter is generated at a time when a key having a velocity exceeding a predetermined value is pressed, and the key is pressed. 5. The envelope control method according to claim 2, wherein the key is terminated when the key is released.