JPH11194769A - Device and method for allocating channel of musical sound, and device and method for controlling envelope of musical sound - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decease the number of channels in use and to effectively use the channels by discriminating musical sounds of the same frequency among musical sounds which are generated at the same time, and putting the generation quanti ties of the discriminated musical sounds into one channel and allocating the channel. SOLUTION: Musical sounds of the same frequency are decided among musical sounds which are generated at the same time and the generation quantities of the decided musical sounds are put together into one channel, which is assigned. This device rewrites envelope speed data ES and envelope time data ET of a component sound (a) each time a new component ousted (b) of the same frequency is allocated to the channel and replaces them with composite envelope speed data ESs and composite envelope time data ETs of the envelope obtained by putting the new component sound (b) together. Therefore, the generation quantities of the respective musical sounds of the same frequency are put together into one channel, which is allocated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a musical sound channel allocating apparatus, a musical sound channel allocating method, a musical sound envelope control apparatus, and a musical sound envelope control method, and more particularly to a control for synthesizing musical sounds having the same frequency.

[0002]

2. Description of the Related Art Conventionally, in a channel assigning apparatus for an electronic musical instrument, not more than the number of musical tones that can be produced simultaneously is formed by time division processing, and when an instruction to generate a new musical tone is issued, the musical tone is generated as described above. Allocated channels are allocated to a plurality of free channels, thereby generating musical tones.

[0003] The musical tones assigned to each channel correspond to the operation of each key of the keyboard, and have different pitches (frequency). The waveforms of the musical tones may be the same or different. If the waveform of this musical tone is different, the timbre will be different.

[0004] Envelopes of simultaneously generated musical tones are individually and independently generated. This envelope is divided into phases such as attack, decay, sustain and release. Each phase is determined by an envelope speed and an envelope level, or an envelope speed and an envelope time, or an envelope level and an envelope time.

[0005]

However, a plurality of tones assigned to each channel may have the same pitch (frequency) in some cases, and different channels are assigned to such tones having the same frequency. Was useless. In some cases, the tone of the same pitch (frequency) is also included in each of the individually generated envelope musical tones, and it is useless to add different envelopes to such musical tones of the same frequency.

[0006]

In order to achieve the above object, according to the present invention, tones of the same frequency are discriminated among a plurality of tones generated simultaneously, and the discriminated amount of generated tones is synthesized to obtain one tone. Assigned to one channel at a time. Thereby, the number of channels to be used can be reduced and the channels can be effectively used.

In the present invention, a tone having the same frequency is discriminated among a plurality of tones generated at the same time, and the envelope waveform of each discriminated tone is synthesized and output as one tone. Thereby, the number of channels to be used can be reduced and the channels can be effectively used.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Overall Circuit FIG. 1 shows the overall circuit of a musical tone control device or an electronic musical instrument.
Each key of the keyboard 11 is used to instruct sound generation and mute of a musical tone. The key scan circuit 12 scans the keys, detects key-on and key-off data, and writes the data to the program / data storage unit 4 by the controller 2. The controller 2 compares the data with the data indicating the on / off state of each key stored in the program / data storage unit 4 until then, and determines whether the key is on or off.

Each key of the keyboard 11 is provided with a step touch switch, the above-described scan is performed for each step switch, and an ON event / OFF event is detected for each ON / OFF of the head of each step switch. . The step switch generates the touch information indicating the speed and strength of the touch, that is, the initial touch data and the after touch data.

The keyboard 11 is composed of a lower keyboard, an upper keyboard, a pedal keyboard, and the like, and each generates a tone having a different tone color, that is, a tone having a different envelope waveform. With regard to the upper keyboard, it is possible to simultaneously play two tones with one key-on. Note that the keyboard 11 is replaced with an electronic stringed instrument, an electronic wind (wind) instrument, an electronic percussion instrument (pad or the like), a keyboard of a computer, or the like.

Each switch of the panel switch group 13 is scanned by a panel scan circuit 14. By this scanning, data indicating ON / OFF of each switch is detected, and written into the program / data storage unit 4 by the controller 2. Then, the data is compared with the data indicating the ON / OFF state of each switch, which has been stored in the program / data storage unit 4, and the ON event / OFF event of each switch is determined by the controller 2.
Done by

The MIDI interface 15 is an interface for transmitting and receiving musical sound data to and from an externally connected electronic musical instrument. This musical data is MIDI (Musical Instrument Digital Interface)
It is a standard one, and a tone is generated based on the musical tone data.

The keyboard 11 or the MIDI interface 15 also includes an automatic performance device. The performance information (tone generation information) generated from the keyboard 11, panel switch group 13, and MIDI interface 15 is information for generating a tone.

The performance information (tone generation information) is musical factor (factor) information, and includes pitch (tone range) information (pitch determining factor), sounding time information, performance field information, number of sounds, resonance degree. Information. The pronunciation time information indicates the elapsed time from the start of the tone generation. The performance field information indicates performance part information, musical sound part information, instrument part information, and the like. For example, melody, accompaniment, chord, bass, rhythm, MID
I, etc., or upper keyboard, lower keyboard, foot keyboard, solo keyboard, MIDI, etc.

The pitch information is taken in as key number data KN. The key number data KN includes octave data (sound range data) and note name data. The performance field information is fetched as part number data PN. The part number data PN is data for identifying each performance area, and is set according to the performance area from which the musical tone for which the sounding operation has been performed originates.

The sounding time information is tone time data TM
And is obtained by a flowchart described later, based on time count data from a key-on event, or substituted in an envelope phase. This sounding time information is shown in detail in Japanese Patent Application No. 6-219324 and drawings as time elapsed information from the start of sounding.

The number-of-sounds information indicates the number of tones sounding simultaneously. For example, the number is based on the number of tones whose on / off data of the assignment memory 40 is "1".
9 and FIG. 15 of Japanese Patent Application No. -242878, Japanese Patent Application No. 6-247.
8 and 18 of Japanese Patent Application No. 6855, Japanese Patent Application No. 6-276857.
9 and FIG. 20 of Japanese Patent Application No. 6-276858 of Japanese Patent Application No. 6-276858.
And the flowchart of FIG.

The resonance degree information indicates the degree of resonance between one musical tone and another musical tone that are sounding simultaneously. The pitch frequency of this one tone and the pitch frequency of the other tone are 1: 2, 2: 3,
If the ratio is a small integer multiple such as 3: 4, 4: 5, 5: 6, the value of the resonance degree information is large, and 9: 8, 15: 8, 15: 1.
If the ratio is a large integer multiple such as 6, 45:32, or 64:45, the value of the resonance degree information becomes small. This resonance degree information is stored in the resonance correlation table 5 in FIG. 7 of Japanese Patent Application No. 1-314818.
3 or read from the resonance ratio table 54.

Further, the panel switch group 13 is provided with various switches. These various switches include a tone tablet, an effect switch, a rhythm switch, a pedal,
Wheels, levers, dials, handles, touch switches, etc., for musical instruments. This pedal is a damper pedal, a sustain pedal, a mute pedal, a soft pedal, or the like.

The various switches generate tone control information. The tone control information is information for controlling the generated tone and is musical factor (factor) information. Information (speed / strength of pronunciation instruction operation), number of sounds, resonance information, effect information, rhythm information, sound image (stereo) information, quantize information, modulation information, tempo information, volume information, envelope information, and the like. . The musical factor information is also combined with the performance information (musical sound information) and input from the various switches, combined with the automatic performance information, or combined with the performance information transmitted and received by the interface.

The timbre information includes a keyboard instrument (such as a piano),
It corresponds to the type of musical instrument (producing medium / producing means) such as a wind instrument (such as a flute), a string musical instrument (such as a violin), and a percussion instrument (such as a drum), and is captured as tone number data TN. The envelope information includes an envelope level EL, an envelope time ET, an envelope phase EF, and the like.

Such musical factor information is sent to the controller 2, where various signals, data, and parameters, which will be described later, are switched, and the content of the musical sound is determined. The performance information (tone generation information) and tone control information are processed by the controller 2, various data are sent to the tone signal generator 5, and a tone waveform signal MW is generated. Controller 2
Is composed of a CPU, a ROM, a RAM, and the like.

The program / data storage unit 4 (internal storage medium / means) comprises a storage device such as a ROM or a writable RAM, a flash memory or an EEPROM, and an information storage unit 7 such as an optical disk or a magnetic disk.
The computer program stored in the (external storage medium / means) is copied and stored (installed / transferred). The program / data storage unit 4 also stores (installs / transfers) a program transmitted from an external electronic musical instrument or a computer via the MIDI device or the transmitting / receiving device. The storage medium of the program includes a communication medium.

The installation (transfer / copy) is automatically executed when the information storage unit 7 is set in the musical tone generating apparatus or when the power of the musical tone generating apparatus is turned on. Installed by The above-mentioned program is a program according to a flowchart described later for the controller 2 to perform various processes.

It should be noted that another operating system, a system program (OS), and other programs are stored in the apparatus in advance, and the above-described program may be executed together with the OS and other programs. This program only needs to be able to execute the processes and functions described in the claims together with another program or alone when installed and executed in the present apparatus (computer body).

Further, part or all of the program is stored and executed in one or more other devices other than the present device, and data to be processed from now on is communicated between the present device and another device via communication means. The present invention may be executed by transmitting / receiving already processed data / programs and as a whole of this apparatus and another apparatus.

The program / data storage unit 4 also stores the above-mentioned musical factor information, the above-mentioned various data, and other various data. These various data include data necessary for time division processing, data for assignment to time division channels, and the like.

In the tone signal generator 5, a tone waveform signal MW having a predetermined length is repeatedly generated and output from the sound system 6. The generation speed of the repeatedly generated tone waveform signal MW is changed according to the pitch information. Also, according to musical factor information such as the above pitch color information,
The waveform shape of the tone waveform signal MW repeatedly generated is switched. The tone signal generator 5 generates a plurality of tone signals simultaneously by time-division processing and generates polyphonic sounds.

From the timing generator 3, a timing control signal for synchronizing all the circuits of the tone generator is output to each circuit. The timing control signal includes a clock signal of each cycle, a signal obtained by ANDing or ORing these clock signals, a signal having a cycle of a channel division time of the time division processing, channel number data CHNo, time count data TI, and the like. including. The time count data TI indicates an absolute time, that is, a lapse of time, and the period from the overflow reset to the next overflow reset of the time count data TI is longer than the longest sounding time of each musical tone, and may be several times in some cases. Is set.

2. FIG. 2 shows the component sound table 20 in the program / data storage unit 4. The component tone table 20 stores data of each component tone constituting the tone of each tone (tone number data TN), and the corresponding component tone data is converted from the tone number data TN and read out. The component sound data includes a plurality of frequency number ratio data FNR and a plurality of envelope data.

The frequency number ratio data FNR indicates the ratio of the frequency of each component sound to the fundamental frequency corresponding to the pitch.
The designated pitch frequency is multiplied by the frequency number ratio data FNR to determine the frequency of each component sound. The frequency number ratio data FNR of the fundamental frequency is "1"
Therefore, it may be omitted.

The envelope data indicates an envelope for each component sound. Each of these envelope data
It consists of envelope speed data ES and envelope time data ET for each envelope phase. The envelope speed data ES indicates a step value of the calculation per one cycle of the digital calculation of the envelope. The envelope time data ET indicates the envelope calculation time (generation time, sound generation time) for each phase, that is, the number of calculations for each phase of the digital calculation. The amplitude of the envelope waveform calculated based on the envelope speed data ES and the envelope time data ET indicates the generation amount of each component sound (each musical sound).

The number of component tones is plural for one tone color, but may be one in some cases. This component sound is synthesized and output for each musical tone. This synthesis ratio changes according to the envelope data. If the envelope calculation level based on the envelope data is “0”, the ratio of the component sound is “0”. One channel is assigned to each of the component sounds, the envelopes are individually controlled, synthesized, and output.

3. FIG. 3 shows the assignment memory 40 of the tone signal generator 5.
Is shown. The assignment memory 40 contains a plurality (16,
32 or 64), and stores data relating to component sounds assigned to a plurality of tone generation channels formed in the tone signal generation unit 5.

In each of these channel memory areas, the frequency number data F of the component sound to which the channel is assigned is stored.
N, key number data KN, the envelope speed data ES, and envelope time data ET are stored. In some cases, the tone number data T
N, touch data TC, tone time data TM, part number data PN, on / off data, envelope phase data EF, and the like are also stored.

The on / off data indicates whether the assigned musical tone (component tone) is being keyed on or sounding ("1"), keyed off or muted ("0"). The frequency number data FN indicates the frequency value of the assigned component sound, and is converted from the key number data KN and further multiplied by the frequency number ratio data FNR. The program / data storage unit 4 is provided with a table (decoder) for this conversion.

The envelope speed data ES and the envelope time data ET are as described above. The envelope speed data ES and the envelope time data ET are rewritten each time a new component sound having the same frequency is assigned to the channel.
The envelope speed data ES and the envelope time data E of the envelope obtained by synthesizing the new component sound.
Replaced by T.

The key number data KN indicates the pitch (frequency) of the assigned and pronounced musical tone, and is determined according to the pitch information. The key number data KN is stored for all the component tones constituting one musical tone, and each time the component tone is assigned to a channel and synthesized when there is an ON event, the key number data KN is stored in the corresponding memory of the assignment memory 40. Key number data K additionally stored in the channel memory area and corresponding to each off event
N is erased. The upper data of the key number data KN indicates the range or octave, and the lower data indicates the note name.

Corresponding to each key number data KN, envelope speed data ES and envelope time data ET of the release of the envelope of the component sound are stored. If the envelope speed data ES and the envelope time data ET of this release are plural in one component sound, all of them are stored.

The tone number data TN indicates the timbre of a tone to be assigned and pronounced, and is determined according to the timbre information. If the tone number data TN is different, the timbre is different, and the tone waveform of the tone is also different. Touch data T
C indicates the speed or intensity of the sounding operation, and is obtained based on the operation of the step switch or determined in accordance with the touch information. The part number data PN indicates each performance area as described above, and is set according to which performance area the tone generated by the sounding operation is from. The tone time data TM indicates an elapsed time from the key-on event.

Each data in each of these channel memory areas is written at the ON timing and / or the OFF timing, and is rewritten or read at each channel timing, and is processed by the musical tone signal generating section 5. . The assignment memory 40 may be provided in the program / data storage unit 4 or the controller 2 instead of in the tone signal generation unit 5.

A method of allocating or truncating each tone to a plurality of tone generating systems for generating a plurality of tone (component tone) in parallel by the channel formed by the above time division processing is described in, for example, Japanese Patent Application No. Hei 10-284,838. 1-42
No. 298, Japanese Patent Application No. 1-305818, Japanese Patent Application No. 1-31
No. 2175, Japanese Patent Application No. 2-209789, Japanese Patent Application No. 2-
No. 409577 and Japanese Patent Application No. 2-409578 are used.

4. FIG. 4 shows the tone signal generator 5 described above. Frequency number data FN of each channel of the assignment memory 40
Are sent to the waveform readout unit 41 and the tone waveform data MW
Is read out at a speed (pitch) according to the frequency number data FN. The read tone waveform data MW is read by the multiplier 4
3, the envelope data EN is multiplied and synthesized, and the accumulator 4
In step 4, the tone waveform data of all channels are accumulated and synthesized, and are generated by the sound system 6.

This tone waveform data MW is only one kind of sine wave. Therefore, a plurality of sine waves having different frequencies for each musical tone are synthesized and output. Therefore, if the amplitude and frequency of each sine wave change, the waveform of the synthesized musical tone also changes, and the timbre also changes. This sine wave may be converted from the tone time data TM or the time count data TI by a trigonometric function operation instead of being stored in the memory.

The tone waveform data MW may be a complex waveform other than a sine wave, or a different waveform may be stored and selected for each timbre, part, pitch (range), touch, and sound generation time. In this case, the tone number data TN,
The part number data PN, the touch data TC, and the like are sent to the waveform reading unit 41, and tone waveform data MW corresponding to the tone number data TN, the part number data PN, and the touch data TC are selected from the waveform memory 42, and are selected. Musical tone waveform data MW is frequency number data FN
Is read out at a speed (pitch) corresponding to. The envelope speed data ES of each channel of the assignment memory 40 is supplied to an adder 46 and an envelope operation memory 4.
8, the data is sequentially accumulated in a time division manner, and the envelope operation data E
N is calculated and sent to the multiplier 43 as the envelope data EN. The envelope calculation memory 48 has an area corresponding to the number of time division channels, stores the envelope calculation data EN of each channel, and calculates the envelope for each channel.

The envelope operation memory 48 is designated by the channel number data CHNo, and only the designated address is written / read or reset. Each channel area of the envelope operation memory 48 is individually reset (cleared) by an off event signal and / or an on event signal.

The envelope time data ET of each channel of the assignment memory 40 is stored in the selector 4
7. The envelope time memory 49 and the adder 51 sequentially set the value to "-1". When the value becomes "0", the NAND gate group 52 detects and outputs a phase end signal. This phase end signal indicates the end of each phase of the envelope.

This phase end signal is input to the phase counter 50 and incremented, that is, +1.
The phase counter 50 counts the phase of the envelope of each channel. The phase counter 50 is provided with a counter corresponding to the number of time-division channels. Only the counter designated by the channel number data CHNo is enabled, and only the designated counter is incremented or reset.

In the phase counter 50, only the counter designated by the channel number data CHNo is reset (cleared) by the controller 2 at the time of the ON event and the OFF event. At this time, the synthesis / rewriting of the envelope speed data ES and the envelope time data ET are performed as described above.

The envelope phase data EF of the phase counter 50 is sent as address data to the assignment memory 40, and the envelope speed data ES and the envelope time data ET for each phase in each channel are read or written. Or The assignment memory 40 is addressed by the channel number data CHNo, and only the designated address is written / read and cleared. Each channel area of the assignment memory 40 is individually reset (cleared) by an off event signal and / or an on event signal.

The phase end signal is supplied to the selector 47
And the envelope time data ET is switched to the envelope time data ET of the next phase. The envelope time memory 49 is addressed by the channel number data CHNo, and only the designated address is written / read or reset. Each channel area of the envelope time memory 49 is individually reset (cleared) by an off event signal (on event signal).

5. Overall Processing FIG. 5 shows a flowchart of overall processing executed by the controller (CPU) 2. The whole process is started by turning on the power of the musical tone generating apparatus, and is repeatedly executed until the power is turned off.

First, various initialization processes such as initialization of the program / data storage unit 4 are performed (step 0).
1) A tone generation process is performed based on a manual performance or an automatic performance on the keyboard 11 or the MIDI interface 15 (step 03).

In this sound generation processing, an empty channel is searched, and a musical tone related to an ON event is assigned to the searched empty channel. The contents of the musical tones include the performance information (musical tone generation information) from the keyboard 11 or the MIDI interface 15, the musical factor information of the musical tone control information, and the program / data storage unit 4 at this time.
Is determined by the musical factor information already stored in.

In this case, the on / off data of "1", the frequency number data FN, the envelope speed data ES, the envelope time data EL,
The envelope phase data EF of “0” is written. In some cases, tone number data TN, touch data TC, part number data PN, and tone time data TM of “0” are also written.

Next, a mute (attenuation) process is performed based on the manual performance or the automatic performance on the keyboard 11 or the MIDI interface 15 (step 05).
In this mute (attenuation) process, a channel to which a tone related to an off event (key-off event, mute event) is assigned is searched, and the tone is attenuated and muted. In this case, the envelope phase of the musical tone related to the key-off event is released, and the envelope level gradually becomes “0”.

Further, the MIDI interface 15
Alternatively, if various switches of the panel switch group 13 are operated, the musical factor information corresponding to the switches is taken in, stored in the program / data storage unit 4, and the musical factor information is changed (step 06). Thereafter, other processes are executed (Step 07), and the processes from Step 02 to Step 07 are repeated.

6. FIG. 6 shows a flowchart of the sound generation process in step 03. First, when there is an ON event (step 11), based on the component sound table 20, the frequency number ratio data FNR and the envelope speed data ES corresponding to the tone number data TN of the musical tone related to this ON event.
In addition, the envelope time data ET is read (step 12).

Next, the frequency number data FN corresponding to the key number data KN of the musical tone relating to this ON event.
Is multiplied by the read frequency number ratio data FNR to obtain frequency number data FN of each component sound (step 13). If the frequency number data FN of each component sound already assigned in the assignment memory 40 matches the obtained frequency number data FN (step 14), the phase number of each phase of this channel is determined. The envelope speed data ES and the envelope time data ET are rewritten to those of the composite envelope, and the key number data KN is additionally stored (step 15). In this synthetic envelope,
The envelope of the new component sound is added to the envelope of the single component sound or the composite component sound already assigned to this channel. The envelope synthesis processing in step 15 will be described later.

If the frequency number data FN of each component sound already assigned does not match the obtained frequency number data FN (step 14),
An empty channel is searched (step 16), and the frequency number data FN, key number data KN, envelope speed data ES, and envelope time data ET of the component sound are written in the area of the assignment memory 40 of the searched empty channel (step 16). Step 17). The above-described envelope synthesis processing or channel assignment processing is repeated for other component sounds (step 18), and other processing is performed (step 19).

7. FIG. 7 shows a flowchart of the envelope synthesizing process in step 15 described above. First, the phase counter 50
The controller 2 reads out the phase count value of the corresponding channel and the remaining envelope time data ET of the corresponding channel in the envelope time memory 49 (step 21), and adds the remaining phase envelope time data ET to the remaining envelope time data ET.
Are sequentially accumulated, and the absolute time from the current time to the end of each phase of the component sound a is obtained (step 22).

In the example of FIG. 8, the sound of the component sound a starts (timing Ta0), the sound of the component sound b starts (timing Tb0), and the attack phase of the component sound a ends (timing Ta1). The decay of the subsequent component sound a ends (timing Ta2), the attack of the component sound b ends (timing Tb1), the sustain of the component sound a ends (timing Ta3), and the decay of the component sound b ends (timing Ta3). At timing Tb2), the release of the component sound a ends (timing Ta4), the sustain of the component sound b ends (timing Tb3), and the release of the component sound b ends (timing Tb4).

In this case, the remaining envelope time data ET is (Ta1-Tb0), and the accumulated value of the envelope time data ET of the remaining phases is (Ta
2-Tb0), (Ta3-Tb0), (Ta4-Tb)
0). Each of the envelope time data ET of each phase is based on these timings Ta0, Ta1, Ta2, T
The time between a3 and Ta4 is shown. Therefore, if the envelope time data ET of the remaining phases are accumulated, each timing Ta
Times up to 1, Ta2, Ta3, and Ta4 are obtained.

The calculated absolute times (Ta2-Tb)
0), (Ta3-Tb0) and (Ta4-Tb0)
The envelope speed data ES of the component sound a of the phase immediately before each timing and the flag a indicating the component sound a
("1") are also stored in association with each other (step 23).

Next, the same applies to the component sound b.
The envelope time data ET of the remaining phases are sequentially accumulated in the remaining envelope time data ET, and the absolute time from the current time to the end of each phase of the component sound b is obtained (step 24). This absolute time is likewise (T
b1-Tb0), (Tb2-Tb0), (Tb3-Tb
0) and (Tb4-Tb0). The obtained absolute times (Tb1-Tb0), (Tb2-Tb0), (T
In (b3-Tb0) and (Tb4-Tb0), the envelope speed data ES of the component sound b of the phase immediately before each timing and the flag b ("0") indicating the component sound b are also stored in association with each other (step). 25).

The timings Ta3 and Tb3 are
Both are the timings of the off operation, and the timings Ta4 and Tb4 are both shifted by the timing of the off operation. Therefore, the absolute time (Ta3-
Tb0), (Ta4-Tb0), (Tb3-Tb0),
(Tb4−Tb0) is not obtained here. But,
This is required if the shape of the envelope does not change due to the off operation. Absolute time (Ta3-Tb0),
(Ta4-Tb0), (Tb3-Tb0), (Tb4-
Tb0) is obtained at the time of the sound deadening process as described later. Therefore, at the end of the sustain of each component sound, the absolute time is set to the maximum possible value, and the envelope speed data ES is set to “0”.

However, when the component sound a has entered release and the component sound b starts to be emitted, the absolute time (Ta4-Tb0) is obtained. This is because the component sound a has already been turned off and the timing of the end of the release is clear.

Then, the absolute times (Ta2-Tb0) and (Ta3-Tb0) obtained in steps 22 to 25 are obtained.
0), (Ta4-Tb0), (Tb1-Tb0), (T
b2-Tb0), (Tb3-Tb0), (Tb4-Tb
0) are arranged in descending order, and the associated envelope speed data ES is similarly rearranged (step 26). Thus, the timings as shown in FIG. 8C are sorted in order.

FIG. 9A shows the absolute time, the envelope speed data ES and the component sound flags sorted in this way. This data content corresponds to the synthesized envelope waveform of FIG. 8 (3).

Next, each absolute time (Ta2-Tb0),
(Ta3-Tb0), (Ta4-Tb0), (Tb1-
Tb0), (Tb2-Tb0), (Tb3-Tb0),
The previous absolute time is subtracted from (Tb4−Tb0) (step 27). As a result, FIG.
The composite envelope time data ETs of the new phase between the timings of the composite envelope waveform of FIG.
(2) It is obtained as shown in the left column. Note that the leading synthetic envelope time data ETs is copied as is (Ta2-Tb0) at the beginning of the absolute time.

Further, the envelope speed data ES corresponding to each absolute time is added and synthesized with the envelope speed data ES of the earlier absolute time, which data has a different flag from the own component sound flags a and b. Is performed (step 28). As a result, the envelope speed ES of the component sound a and the envelope speed ES of the component sound b are added and synthesized for each phase of FIG. 8 (3), and a new period between the timings of the synthesized envelope waveform of FIG. Synthetic envelope speed data ESs of the various phases are obtained as shown in the right column of FIG. 9 (2).

The synthesized envelope time data E of each phase of the synthesized envelope waveform thus obtained is
Ts and the composite envelope speed data ESs are written in the corresponding channel area of the assignment memory 40, and the counter of the corresponding channel of the phase counter 50 is cleared (step 29). This starts the generation of the synthetic envelope. in this case,
The portion after the on-event (or the off-event described later) of the composite envelope is stored in the assignment memory 40 and generated.

As described above, the envelope speed data ES and the envelope time data ET of the component sound a are rewritten each time a new component sound b of the same frequency is assigned to the channel, and the envelope of the envelope obtained by synthesizing the new component sound b is obtained. Synthetic envelope speed data E
Ss and the synthetic envelope time data ETs.

Therefore, the generated amounts of the musical tones having the same frequency are synthesized and assigned to one channel. In addition, the envelope waveforms of each musical tone having the same frequency are synthesized and output as one musical tone.

Then, the envelope speed data ES and the envelope time data ET after the release of the component sound a are stored in the assignment memory 40 in correspondence with the key number data KN of the component sound a, and after the release of the component sound b. Envelope speed data ES and envelope time data ET are also key number data KN of component sound b.
Is stored in the assignment memory 40 (step 30). Envelope synthesis processing is performed on the envelope speed data ES and the envelope time data ET after this release after the off event.

8. FIG. 10 shows a flowchart of the silencing process in step 05 described above. First, when there is an off event (step 31),
The channel of the assignment memory 40 storing the same key number data KN as the key number data KN relating to this off event is searched (step 3).
2).

When the corresponding channel is found (step 33), the same processing as the above-described envelope synthesis processing in step 15 is executed (step 3).
4), the key number data KN, the corresponding envelope speed data ES and the envelope time data ET
Is deleted from the channel area (step 3
5). The above-described envelope synthesis processing by the off event is repeated for other component sounds (step 36).
Other processing is performed (step 37).

In the envelope synthesizing process of step 34, the envelope speed data ES and the envelope time data ET after the release stored corresponding to the key number data KN are read out, and the same envelope synthesizing process is executed. You. However, in this case, since the envelope speed data ES of this release is a negative value, it is substantially subtracted. This is the same with decay. In the envelope synthesizing process in step 34, the envelope speed data ES and the envelope time data ET of the release in step 30 are set.
Is not set.

Thus, even at the time of the off event, the synthesized envelope speed data ESs of the synthesized component sound a + b
And the combined envelope time data ETs are rewritten and replaced with the combined envelope speed data ESs and combined envelope time data ETs of the envelope in consideration of the new release.

Therefore, also at the time of the off event, the generated amounts of the musical tones having the same frequency are synthesized and assigned to one channel. In addition, the envelope waveforms of each musical tone having the same frequency are synthesized and output as one musical tone.

9. Processing of Tone Time Data TM and Number of Simultaneous Sounds FIG. 11 is a flowchart of an interrupt processing executed by the controller 2 at regular intervals. In this process, the tone time data TM is incremented and the number of simultaneous sounds is counted.

In this processing, each channel area of the assignment memory 40 (steps 41 and 4)
6, 47), for tone data whose on / off data is "1" and a tone is being produced (step 43), its tone time data TM is incremented by "1" (step 44).

Similarly, for each channel area of the assignment memory 40 (steps 41, 46, 4
7) After the polyphony data is once cleared (step 42), the on / off data of "1" and the tone being generated are counted (step 43), and the polyphony is sequentially incremented by "+1". (Step 45). The counted number of simultaneous sounds is stored in the program / data storage unit 4.

Then, other periodic processing is performed (step 48). In this way, the elapsed sounding time of the musical tones of each channel is counted and stored and used as the above-mentioned sounding time information. The number of musical tones during the sounding of all the channels at that time is counted and stored and used as the above-mentioned simultaneous sounding number information. .

The present invention is not limited to the above embodiment, but can be variously modified without departing from the spirit of the present invention. For example, the musical tone waveform data MW stored in the waveform memory 42 may be a complex waveform other than a sine wave, or a different waveform is stored and switched and selected for each timbre, pitch (range), touch, part, and sounding time. Is also good. The waveform having such a complicated shape is read out and output as a musical tone waveform of each component sound.

The tone assigned to each channel may be one independent tone other than the component tone. In this case, the waveforms of musical tones assigned to the same channel have the same waveform shape and the same pitch (frequency). Even in such a case, synthesis of the envelope or synthesis of the generated amount can be performed in the same manner.

Further, the amplitude of the tone waveform data MW other than the envelope may be synthesized. In this case, what is synthesized in steps 15 and 34 is an amplitude determining factor, for example, touch data TC. The touch data TC of each channel of the assignment memory 40 is added for each of the ON event and the OFF event, and the added touch data TC is added to the assignment memory 4.
From 0, the signal is sent to the multiplier 43 and multiplied by the musical tone waveform data MW. The added touch data TC
Is the envelope speed data E for the channel.
S may be multiplied. Using the envelope speed data ES thus multiplied, the envelope synthesis in steps 15 and 34 is performed.

Although the above channels are formed by time division processing, the same number of tone signal generators 5 as the number of channels are provided, and tone waveform data MW of each tone signal generator 5 is added and synthesized by an adder. May be done.

Further, the envelope data may be replaced with envelope speed data ES and envelope level data EL, or envelope level data EL and envelope time data ET. In this case, the difference between two adjacent envelope level data EL is divided by the envelope speed data ES to obtain the envelope time data ET. Also, the difference between two adjacent envelope level data EL is divided by the envelope time data ET to obtain the envelope speed data ES.

The present invention can be implemented in an electronic musical instrument or a computer. The functions of the circuits in the above-described drawings may be implemented by software (flowcharts), and the functions of the flowcharts in the above-described drawings may be implemented by hardware (circuits). The invention described in each claim can also be realized as a medium storing a computer program that causes a computer to execute the invention, a communication device (method) of the computer program, a musical sound generating device (method), and a musical sound control device (method). .

[0091]

As described above in detail, according to the present invention, tones having the same frequency among a plurality of tones generated at the same time are discriminated, and the generated amounts of the discriminated tones are synthesized into one channel. Was assigned. Therefore,
It is possible to achieve the effect that the number of channels to be used can be reduced and the channels can be effectively used.

Further, in the present invention, a tone having the same frequency is discriminated from a plurality of tones generated simultaneously, and the envelope waveform of each discriminated tone is synthesized and output as one tone. Therefore, there is an effect that the number of channels to be used can be reduced and the channels can be effectively used.

[Brief description of the drawings]

FIG. 1 shows an entire circuit of a musical sound control device.

FIG. 2 shows a component sound table 20;

FIG. 3 shows an assignment memory 40.

FIG. 4 shows a tone signal generator 5;

FIG. 5 shows a flowchart of the entire processing.

FIG. 6 shows a flowchart of a sound generation process.

FIG. 7 shows a flowchart of an envelope synthesis process.

FIG. 8 shows an example of an envelope synthesis waveform of a component sound a and a component sound b having the same frequency.

FIG. 9 shows an example of envelope synthesis data of a component sound a and a component sound b having the same frequency.

FIG. 10 shows a flowchart of a mute process.

FIG. 11 shows a flowchart of an interrupt process.

[Description of Signs] 2 ... Controller (CPU), 3 ... Timing generator,
4 Program / data storage unit 5 Music tone signal generation unit
Reference numeral 6: sound system, 7: information storage unit, 11: keyboard, 13: panel switch group, 15: midi interface, 20: component sound table, 40: assignment memory, 41: waveform reading unit, 42: waveform memory,
47 selector, 48 envelope processing memory, 49
... Envelope time memory, 50 ... Phase counter, 46,51 ... Adder, 52 ... Nand gate group.

Claims (5)

[Claims] 1. For a plurality of channels to which a plurality of simultaneously generated tones are respectively assigned, a tone having the same frequency is determined among the plurality of simultaneously generated tones, and the determined generation of a tone having the same frequency is performed. Combine the quantities
A musical sound channel allocating device characterized by allocating to a single channel collectively. 2. For a plurality of channels to which a plurality of simultaneously generated tones are respectively assigned, a tone having the same frequency is determined from among the plurality of simultaneously generated tones, and the determined generation of a tone having the same frequency is performed. Combine the quantities
A method of assigning channels for musical sounds, wherein the channels are collectively assigned to one channel. 3. A plurality of tones generated at the same time, wherein the tones having the same frequency are determined, and the envelope waveforms of the determined tones having the same frequency are synthesized and output as one tone. Musical sound envelope control device. 4. A plurality of tones generated simultaneously, wherein a tone having the same frequency is determined, and the envelope waveforms of the determined tones having the same frequency are synthesized and output as one tone. An envelope control method for musical sounds. 5. A method according to claim 1, wherein the plurality of simultaneously generated musical tones are one to one.
A plurality of simultaneously generated tones having the same waveform or different waveforms, when a new tone is generated or when a generated tone is extinguished. For each envelope generation amount of the same frequency of this musical tone or the component sound of this musical tone, any two of the envelope level, envelope time and envelope speed of the synthesized envelope generation amount are calculated, and the calculated envelope level and envelope are calculated. 5. The musical tone according to claim 1, wherein a musical tone having the frequency or a composite envelope of component sounds of the musical tone is generated in one channel based on any two of a time and an envelope speed. Channel assignment device, tone channel assignment method, tone envelope -Loop control device or envelope control method of a musical tone.