JPS63261396A - 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 an output instruction (for example, pressing a key on a keyboard).
On the other hand, regarding sound quality, there are musical tone synthesis techniques that attempt to reproduce complex waveform changes of musical tones by controlling multiple sound generation channels in order to synthesize one musical tone (for example, Publication No. 57-31166).

Hereinafter, the above-mentioned key assigner and musical tone synthesizer will be explained with reference to the drawings.

FIG. 2 shows the depiction 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 assumed that all of the first to Mth blocks 0-) and H1 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
When the content of the first block of the assignment memory 102 corresponding to the content of Change the content to 1 (F) to indicate all on. Also, the assignment control unit 101
If the content of the block is on, the assignment control section 10
1, after outputting an instruction to the first musical tone synthesizer to forcibly terminate the sound generation (first dump and pout), when a photon signal in the process of ending the sound generation is input from the first musical tone synthesizer, the first musical tone synthesis starts. At the same time, all musical tone information is output to the instrument, and the contents of the first block of the assignment memory 102 are rewritten to the contents indicating ON.

In the above description, when the assignment friend j1 wholesaler 101 rewrites the entire contents of the first block of the assignment memory 102, it is assumed that not only the on/off information but also musical tone information is rewritten. In addition, when the result of incrementing the entire contents of the pointer register 103 indicates m(M+1) blocks, the entire first block is reset to -t, .

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 102,
When the same musical tone information is detected in all of the first blocks indicating ON, it outputs an instruction to finish all sound generation by sending 71 to the first block tone synthesizer, and the contents of the first block in the assignment memory 102 are rewritten to the contents indicating that all blocks are OFF. .

Contrary to the above operation, the number of musical tones that can be instructed to output (for example, the number of keys on a keyboard), J: A musical tone synthesizer with a number M, which is a very small number, can be used based on the output instructions within the range of the number of simultaneous polyphony M. The sound generation will be controlled sequentially.

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

In FIG. 3, 110 is a synthesis control unit, 111° 112
are the first and second waveform generators, 113 and 114 are the first and second envelope generators, and 116° and 116 are the first and second envelope generators.
117 is an adder, 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.

Synthesis: 1ill Key part 110, pitch, tone, volume, on.

Synthesis information corresponding to musical tone information input such as OFF is read from the full synthesis parameter memory 118, and the waveform generators 111, 112 and envelope generators 113, 114i:fi are controlled according to the read synthesis information to output the full synthesized sound. do.

That is, when musical tone information is on, the synthesis control section 110 stores the synthesis parameter memory 11 based on pitch, timbre, and volume information.
8, reads the corresponding synthesis information, and according to this synthesis information, the first and second waveform generators 1
11 and 112, and outputs all data instructing the waveform type and cycle to be output to the first and second envelope generators 113 and 114.

The first and second waveform generators 111 and 112 repeatedly output all desired waveforms 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:li control unit 110 that instructs all envelopes to be output.

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 σ in first and second multipliers 115 and 116, respectively, and then added together in an adder 117.

In the above operation, the output waveforms of the first and second multipliers 115 and 116, which vary in time independently from each other, are transmitted to 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 either case, if you want to have a maximum number of pronunciations of 114, or if you want to have a maximum sound quality of 114, there is a problem in that a large number of MN pronunciation channels must be prepared.

In view of the above problems, the present invention has a simple configuration! ! ! '1
With the aim of efficiently using the limited number of sounding channels without placing a huge burden on Kento and without rapidly deteriorating the quality of musical tones, we can further freely control the number of simultaneous sounds and sound quality. It offers a full range of 'IE child instruments that can compete with each other.

Means for Solving All Problems In order to achieve all of the above objects, the 'lE child instrument of the present invention has the following features:
The musical tone information is input to the control section that controls the sound generation channel group, and the synthesis information including data regarding the number of sound generation channels to be used corresponding to the musical tone information input to the control section is supplied to the control section. synthesis parameter memory,
A sound channel group consisting of multiple sound channels that produce sound according to the control of the control section, an assignment memory for monitoring the sound generation status and key on/off status of each sound channel, and a pointer that is used as a basis for determining the sound channel to be assigned. It consists of registers.

Effect: With this configuration, the control section reads the synthesis information %ffi from the synthesis parameter memory containing data regarding the number Li of tone generation channels to be used for synthesis, and selects the tone generation channel indicated by the pointer register, in accordance with the input musical tone information. It instructs the 51 channels determined based on the above to produce sound, and also writes in the assignment memory that the sound is being produced and that the key is on. Also, if musical tone information indicating key-off is inputted, the key-off information is immediately written into the assignment memory.

Before instructing each sound generation channel to turn on sound, the control section reads the status of all sound generation channels from the assignment memory, and if the number of channels in which sound generation is stopped is Li or more, sends an instruction to the pointer register. The 51 sound generation channels whose sound generation is stopped, starting from the sound generation channel, are instructed to turn on the sound generation.

If the number of channels in which sound generation is stopped is less than Li, a total of L1 channels captured after the key-off sound generation channel is forcibly terminated are instructed to turn on sound generation.

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 is a complete block diagram of an electronic musical instrument according to an embodiment of the present invention.

In FIG. 1, 1 is a control section, 2 is a synthesis parameter memory, 3 is an assignment memory, 4 is a sound generation channel group, 5 is an adder, and 10 to 12 are first to Mth sound generation channels, respectively.

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

First, when musical tone information such as timbre, pitch, volume, etc. regarding a musical tone to be output is sent to the control section 1, 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 synthesis information that has been stored in advance in the synthesis parameter memory 2 has contents as shown in Table 1, for example. In other words, the tone. From musical tone information such as pitch and volume, it is possible to obtain synthesis information consisting of the number L1 of pronunciation channels to be used and pronunciation information such as waveforms or envelopes to be emitted by each of the 51 channels.

(Left below) Table 1 Next, the controller determines whether all sound generation channels are on or off, whether key on/off is applied, and the sound start time by reading the data in the assignment memory 3,
If the number of off channels is Ll or more, the sound channel indicated by pointer register 6 and a total of Li off channels that follow are captured; if the number of off channels is less than Ll, the sound channel where the key was turned off is captured. If the number of channels that are off is still insufficient, then the sound channel indicated by the pointer register and the following several sound channels with insufficient sound channels are forced to end. Capture pronunciation channel km.

When all Li sound channels are turned off,
The control 'VA1 outputs all of the issuing information and pitch information read from the synthesis parameter memory 2 for a total of L1 sound generation channels, and also turns on and keys on L1 sound generation channels for the assignment memory 3. Write all the data indicating this and the information on the start time of pronunciation.

Here, the information on the on/off, key on/off, and sound generation start time of each sound generation channel stored in the assignment memory 3 is as shown in Table 2, for example.

In Tables 2 and above, the sound generation channel indicated by the pointer register 6 and the subsequent sound generation channels are treated as the first sound generation channel after the Mth sound generation channel.

When musical tone information to stop the musical tone being output is input, the control section 1 performs the same operation as before, writes all key-off information in the assignment memory 3, and writes information on the sound generation start time i.
It shall be 1 J cent.

Control*'rgl constantly refers to all the information on the sound generation start time in the assignment memory 3, and rewrites the contents of the pointer register 6 to indicate the channel with the smallest channel number among the channels that were assigned earliest in time.

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 conventional case.

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

In the first embodiment, even if the control unit 1 performs forced termination on all the tone generation channels that are key-off, if the number of turned-off channels is insufficient, the tone generation channel indicated by the pointer register 6 and the following tone generation channel are automatically terminated. I tried to forcefully terminate all the sound generation channels for one sound generation channel and capture the required number of channels, but the control unit 1&''i
By reading the sound generation start time data ta in the assignment memory 3, it is also possible to capture all the missing several sound generation channels in order from the sound generation channel with the earliest sound generation start time.

Alternatively, it is assumed that the assignment memory 3 contains the data of the sound start time, but the assignment memory 3 contains all the data of the envelope level at that time, 1llll? a1] In addition to reading the envelope data level booter, the unit 1 may capture the missing several sound generation channels in order from the lowest envelope level.

As described above, according to this embodiment, the synthesis parameter memory 2 stores musical tone information regarding musical tones to be output, that is, musical tone synthesis information corresponding to timbre, pitch, and volume, that is, the number of pronunciation channels and pronunciation information of each pronunciation channel. Let's set it to ζ, so
It is possible to realize an electronic musical instrument that can output musical tones while appropriately changing the number of different sound generation channels for each musical tone, which is necessary to synthesize musical tones at the same level. Also, if you want to increase the total number of simultaneous sounds, all you have to do is reduce the total number of sounds used for musical tones. In addition, since the musical tone information (key on/off) related to the performance status is taken into account, the control unit 1 can be easily configured without placing a large burden on the monitor, and without rapidly deteriorating the quality of the musical tone. Limited number of channels can be used. Furthermore, since it is designed to respond to volume, it is also possible to respond to so-called touch response.

Effects of the Invention In the present invention, the number of sound generation channels to be used can be arbitrarily set for each musical tone to be output, so that the tone quality of various musical tones can be maintained at the same level. By controlling this, you can also change the number of simultaneous polyphony. In addition, we have taken into consideration musical tone information (key on/off) related to the performance state, so you can easily
With this configuration, limited channels can be used efficiently without placing a large burden on the control section regarding monitoring and without rapidly deteriorating the quality of musical tones.

[Brief explanation of drawings]

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 a conventional electronic musical instrument. 1... Control unit, 2... Synthesis parameter memory, 3... Assignment memory, 4...
Sound generation channel group, 6... Adder, 6...
...Pointer register, 10...First sound generation channel, 11...Second sound generation channel, 1
2...Mth pronunciation channel. Name of agent: Patent attorney Toshio Nakao and one other person - Figure 2

Claims (1)

[Claims] 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; and an output from the control section. A sound generation channel group consisting of a plurality of sound generation channels that generate sound according to the synthesis information provided, an assignment memory for the control unit to monitor the sound generation state and key on/off state of each sound sound channel, and the sound generation channel to be used is determined. The control section outputs the synthesis information to the same number of sound generation channels as the number of sound generation channels used included in the synthesis information supplied from the synthesis parameter memory. An electronic musical instrument characterized by: