JPS63121093A - Electronic musical instrument - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electronic musical instrument that generates and outputs various musical tones.

BACKGROUND OF THE INVENTION In recent years, digital technology has come to be used in electronic musical instruments, and improvements in operability and sound quality have been remarkable.

Regarding operability, there is a key assigner technology that controls a musical tone synthesizer in response to output instructions (for example, key presses on a keyboard).
On the other hand, regarding sound quality, there is a musical tone synthesis technology that attempts to reproduce the complex waveform changes of a musical tone by controlling multiple sound generation channels in order to synthesize one musical tone (for example, 67-31156).

The key assigner and tone synthesizer will be described below with reference to the drawings.

FIG. 2 shows the configuration of a conventional key assigner.

In FIG. 2, 101 is an assignment control section, 102 is an assignment memory, and 103 is a pointer register.

The operation of the key assigner configured as described above will be explained below.

An assignment control unit 101 connected to M musical tone synthesizers controls turning on musical tones input from an input device such as a keyboard, for example.
The musical tone synthesizer is controlled in response to information regarding off, pitch, timbre, volume, etc.

Here, it is assumed that the contents of the pointer register 103 in the initial state indicate the first block of the assignment memory 102 consisting of M blocks. It is also assumed that all M of the first to Mth blocks of the assignment memory 102 have been initialized to indicate an OFF state.

When the content of the musical tone output instruction input is on, the assignment control unit 101 reads the content of the pointer register 103 and then increments the content of the pointer register 103 by one block. Read pointer register 103
Assignment memo corresponding to the content! When the content of the first block of J102 is off, the assignment control unit 101
At the same time as outputting musical tone information to the i-musical tone synthesizer, the contents of the first block of the assignment memory 102 are rewritten to contents indicating ON. Further, when the content of the i-th block is on, the assignment control unit 101 outputs an instruction to the first musical tone synthesizer to force the end of sound generation (referred to as a first dump), and then outputs the completion signal of the end of sound generation process to the first musical tone synthesizer. When input from the first musical tone synthesizer, musical tone information is outputted to the first musical tone synthesizer, and the contents of the first block of the assignment memory 102 are rewritten to the contents indicating ON.

Note that when the assignment control section 101 rewrites the contents of the i-th block of the assignment memory 102, it rewrites not only the on/off information but also musical tone information. Further, when the result of incrementing the contents of the pointer register 103 indicates the (M+1)th block, it is reset to indicate the first block.

On the other hand, when the content of the musical sound output instruction input is OFF, the assignment control unit 101 searches the content of the assignment memory 1o2,
When a co-block with the same musical tone information and indicating on is detected, an instruction is output to the j-th musical tone synthesizer to end sound generation, and the contents of the co-block in the assignment memory 102 are rewritten to contents indicating off.

By the above operation, the number of musical tone synthesizers whose number M is smaller than the number of musical tones that can be instructed to output (for example, the number of keys on a keyboard) is sequentially controlled to produce sounds within the range of the number of simultaneous polyphony M, based on the output instruction. Become.

FIG. 3 shows the configuration of a conventional tone synthesizer.

In Fig. 3, 11o is the composite side leg, 111°112
are the first and second waveform generators, 113 and 114 are the first and second envelope generators, and 115 and 116 are the first and second envelope generators.
118 is a synthesis parameter memory, and 119 is a sound generation channel.

The operation of the musical tone synthesizer configured as described above will be explained below.

The synthesis side part 110 includes pitch, tone, volume, and on.

Synthesis information corresponding to musical tone information input such as OFF is read from the synthesis parameter memory 118, and a synthesized sound is output by controlling the waveform generator and envelope generator according to the read synthesis information.

That is, when the musical tone information is on/off, the synthesis control unit 110 stores the synthesis parameter memory 11 based on the pitch, timbre, and volume information.
8, reads the corresponding synthesis information, and according to the synthesis information, the first and second waveform generators 11
1.112, and outputs data instructing the waveform type and cycle to be output to the first and second envelope generators 113 and 114, respectively.

The first and second waveform generators 111 and 112 repeatedly output a desired waveform at a desired period in accordance with data input from the synthesis control section 110 instructing the type and period of the waveform to be output. On the other hand, the first and second envelope generators 113 and 114 output desired envelopes in accordance with data input from the synthesis control section 110 instructing the envelope to be output.

The waveforms output from the first and second waveform generators 111 and 112 and the first and second envelope generators 113 and 11
The envelopes output from 4 are multiplied by first and second multipliers 115 and 116, respectively, and then added by adder 117.

According to the above operation, the output waveforms of the first and second multipliers 115 and 116, which vary in time independently from each other, are output from the adder 11.
7, the result is a synthesized output as a single musical sound waveform that fluctuates over time.

In addition, in the above-mentioned musical tone synthesizer, the first and second two
There are musical tone synthesizers that have a system, that is, two sounding channels, but also have a larger number of sounding channels.

Problems to be Solved by the Invention However, in the above configuration, when the maximum number of simultaneous sounds is M, that is, the number of synthesizers is M, each tone synthesizer must have N sound generation channels. For example, MN sound generation channels must be prepared. In other words, there is a problem in that a large number of MN sound generation channels must be prepared in either case when it is desired to increase the maximum number of sound generation M(z) or when it is desired to improve the sound quality.

In view of the above-mentioned problems, the present invention aims to efficiently use a limited number of sound generation channels with a simple configuration, and furthermore, it is an electronic device that can freely and efficiently control the number of simultaneous sounds and sound quality. It provides musical instruments.

Means for Solving the Problems In order to achieve this object, the electronic musical instrument of the present invention includes a control section that receives musical tone information, controls a group of sound generation channels, and feeds back the status of each sound generation channel; A synthesis parameter memory that supplies synthesis information to the control section including data regarding the number of sound generation channels to be used corresponding to the musical tone information input to the control section, and a sound generation channel consisting of a plurality of sound generation channels that generate sounds according to the control of the control section. an assignment memory for the control unit to read and write to know the status of each sound generation channel, and a monitor memory for the control unit to read and write the status of the musical tone being output.

Operation With this configuration of the present invention, the control section reads the status of each sound generation channel and writes the contents into the assignment memory. On the other hand, the control section reads synthesis information including data regarding the number L1 of tone generation channels used for synthesis from the synthesis parameter memory, and reads the status of each tone generation channel from the assignment memory, in accordance with the input musical tone information. to capture the sound in an off sounding channel, that is, an empty channel.

When L>K, that is, when the number of required sounding channels is greater than the current number of available channels, the control section calculates the number of sounding channels Lj of a musical tone currently being sounded that is registered in the monitor memory. are all turned off and Lj≦(K+Lj
) is captured, and an instruction to turn on the sound generation is given to the 51 sound generation channels necessary for the musical tone to be generated.

As a result of the above operations, each musical tone is synthesized using the number of sounding channels corresponding to the number of sounding channels used for sounding, which is written in advance in the synthesis parameter memory for each musical tone.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of an electronic musical instrument according to an embodiment of the present invention.

In FIG. 1, 1 is a control unit, 2 is a synthesis parameter memory, 3 is an assignment memory, 4 is a sound generation channel group, 6 is an adder, 6 is a monitor memory, and 7° and 8 are first and second pointer registers, respectively. , 10 to 12 are the first to Mth, respectively.
This is the pronunciation channel.

The operation of the electronic musical instrument configured as described above will be described below.

First, each time the control unit 1 detects that the sound generation state of any sound generation channel in the sound generation channel group 4 is turned off, it writes data indicating that the corresponding sound generation channel is off in the assignment memory 3, and Also in the monitor memory 6, data indicating that the corresponding sound generation channel is off is written.

On the other hand, when musical tone information such as timbre, pitch, volume, etc. regarding a musical tone to be output is input, the control section 1 reads synthesis information corresponding to the musical tone information from the synthesis parameter memory 2. Here, it is assumed that the composition information stored in advance in the composition parameter memory 2 has contents as shown in Table 1, for example.

(Left below) Table 1: Obtain synthesis information consisting of the number of pronunciation channels Li to be used and pronunciation information such as waveforms or envelopes to be emitted by each of the Li channels from musical tone information such as timbre, pitch, and volume. I can do it.

Next, the control unit 1 determines whether or not the first to Mth sound generation channels are generating sound, that is, whether each sound generation channel is on or off, by reading the data in the assignment memory 3, and determines whether the sound generation channels that are off are , that is, the number K of free channels is obtained. Here, it is assumed that the information regarding the off/off of each sound generation channel stored in the assignment memory 3 has contents as shown in Table 2, for example.

When L engineering ≦, the control unit 1 sequentially outputs Li pieces of pronunciation information and pitch information read from the synthesis parameter memory 2 to the off sound generation channel and turns it on, and also outputs it to the off sound generation channel. for the corresponding pronunciation channel (
Write data indicating that Li pieces) are on. Further, the control section 1 writes data indicating that each of the 51 sound generation channels to be used is on to the address in the monitor memory e indicated by the first pointer register 7, and then writes the data to the address in the monitor memory e indicated by the first pointer register 7. Increment the contents of. When the incremented result indicates the (MH)th address, the contents of the first pointer register 7 are set to 1.
Reset to indicate the th address. Here, it is assumed that the information regarding the assignment status of each output musical tone stored in the monitor memory 6 has contents as shown in Table 3, for example.

(Left space below) As shown in Table 3, the monitor memory 6 shows the order in which each musical tone was generated and the sound generation channel used for each musical tone.

Li) When K, the control unit 1 assigns the sound generation channel indicating ON from the address in the monitor memory 6 indicated by the second pointer register 8, that is, to the earliest stage of the output musical tones currently being generated. Pronunciation channel Lj
, and instructs the corresponding sound generation channel to forcibly terminate, and also turns off the state indicated by the address in the monitor memory 6 indicated by the second pointer register 8, that is, all sound generation channels are turned off. After making the address unassigned, the contents of the second pointer register 8 are incremented.

Note that when the incremented result indicates the (M+1)th address, the contents of the second pointer register 8 are reset to indicate the first address.

When it detects that the corresponding pronunciation channel is turned off,
The control unit 1 sequentially outputs Li pronunciation information and tone pitch information read from the synthesis parameter memory 2 to the (K+Lj) captured off sounding channels to turn them on/off, and also outputs them to the assignment memory 3. Writes data indicating that the corresponding sound generation channel (Li number) is on. In addition, the control unit 1 stores at the address in the monitor memory 6 that the first voice/tare register register indicates that each of the Li sounding channels to be used is on and each of the unused (M-L) sounding channels is on. After writing data indicating that it is off, the contents of the first pointer register 7 are incremented. When the incremented result indicates the (M+1)th address, the contents of the first pointer register 7 are reset to indicate the first address. Here, it is assumed that the information regarding the assignment status of each output musical tone stored in the monitor memory 6 has contents as shown in Table 3, for example.

In the above, it is assumed that the sound generation channel group 4 consisting of M sound generation channels 10 to 12 operates in the same manner as in the prior art.

Through the above operations, the sound waveforms output from the M sound generation channels 10 to 12 are added by the adder 5 and output as musical tone data.

Note that even if Lj sound channels are captured, L
When K>(K+Lj), it is sufficient to repeat the above-described operation for the second pointer register 8 to capture a further usable sound channel.

As described above, according to the present embodiment, the musical tone information regarding the musical tone to be output, that is, the musical tone synthesis information corresponding to the timbre, pitch, and volume, that is, the number of sounding channels and the sounding information of each sounding channel is stored in the synthesis parameter memory. This allows you to change the number of different sound generation channels for each musical tone as necessary to achieve the same level of musical tone synthesis, and also to update the number of sound generation channels used for a certain musical tone as they are turned off over time. It can be released as a channel.

Furthermore, when the number of free channels is insufficient, it is possible to capture a sufficient number of free channels and output musical sounds after muting the musical sound that started outputting the earliest among the currently sounding musical tones. Electronic musical instruments can be realized. Furthermore, when it is desired to increase the number of simultaneous sounds, it is sufficient to simply reduce the number of sounds used for musical tones. Furthermore, since it is designed to respond to volume, it is also possible to respond to so-called touch response. Since the control section is still feeding back the sounding state of each sounding channel in the sounding channel group to the assignment memory, the sounding state of each sounding channel can be instantly recognized.

Effects of the Invention In the present invention, the number of sound generation channels used can be set arbitrarily and appropriately for each musical tone to be output, so that the sound quality of various musical tones can be made to the same level. By controlling over time, the number of simultaneous sounds can also be changed. Furthermore, when the number of free sound generation channels is smaller than the number of used sound generation channels, the number of free sound generation channels can be secured by stopping the musical tone being output.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an electronic musical instrument according to an embodiment of the present invention, and FIGS. 2 and 3 are block diagrams of conventional electronic musical instruments. 1... Control unit, 2... Synthesis parameter memory, 3... Assignment memory, 4...
- Sound generation channel group, 5... Adder, 6...
...Monitor memory, 7...First pointer register, 8...Second pointer register, 10
...First sounding channel, 11th... Second sounding channel, 12th... Mth sounding channel. Name of agent Patent attorney Toshio Nakao and one other person Kei Ku

Claims (1)

[Claims] (1) a control section that inputs musical tone information; a synthesis parameter memory that supplies synthesis information including data regarding the number of sound generation channels to be used to the control section in accordance with the musical tone information input to the control section; a sound generation channel group consisting of a plurality of sound generation channels that generate sounds according to synthesis information output from the control section; an assignment memory for the control section to read or write the state of each sound generation channel; and an assignment memory for reading or writing the state of each sound generation channel; and a monitor memory for reading or writing by the control unit,
The control unit focuses on the pronunciation status of each pronunciation channel in the pronunciation channel group to the sign memory, and the number of pronunciation channels used in the synthetic information supplied from the synthetic parameter memory is the same or more. The electronic musical instrument is characterized in that, after capturing the sound generation channels, the synthesis information is outputted to the same number of sound generation channels as the number of used channels.