JPS63127293A - 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) (for example, as disclosed in US Pat. No. 3,610,079).
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, (Special Publication No. 57-31156).

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 1o3 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, in the initial state, the contents of the pointer register 103 are stored in the assignment memory 102 consisting of M programs.
Assume that the first block of 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 101G4 reads the content of the pointer register 103, and then increments the content of the pointer register 103 by one block. Read pointer register 10
When the content of the first block of the assignment memory 102 corresponding to the content of No. 3 is off, the assignment control unit 1o1
At the same time as outputting musical tone information to the musical tone synthesizer, the contents of the first program in the assignment memory 1o2 are rewritten to contents indicating ON. In addition, when the content of the first block is on, the assignment control section 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 a completion signal of the end of sound generation process to the first 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.

In the above description, when the assignment control section 101 rewrites the 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. 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 tone output instruction input is OFF, the assignment control unit 1o1 searches the content of the assignment memory 102,
When the first block with the same tone information and indicating ON is detected, it outputs an instruction to the j-th musical tone synthesizer to end the sound generation, and at the same time rewrites the contents of the j-th pro block in the assignment memory 102 to the 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, 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.
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 control section 110 reads synthesis information corresponding to musical tone information input such as pitch, timbre, volume, on, off, etc. from the synthesis parameter memory 118, and operates a waveform generator and an envelope generator according to the read synthesis information. By controlling it, a synthesized sound is output.

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 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 according to 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 116 and 116, respectively, and then added by adder 117.

With the above operation, the output waveforms of the first and second multipliers 115 and 116, which vary in time independently from each other, are
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 M1, 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. However, there is a problem in that a large number of MW sound generation channels must be prepared in either case when it is desired to increase the maximum number of sounds M 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 further provides an electronic musical instrument that can freely and efficiently control the number of simultaneous sounds and sound quality. It provides:

Means for Solving the Problems In order to achieve this object, the electronic musical instrument of the present invention includes a control section that takes musical tone information as input and controls a group of sound generation channels, and a control section that takes musical tone information as input and controls a group of sound generation channels, and a , a synthesis parameter memory that supplies synthesis information to the control section including data regarding the number of tone generation channels to be used and data regarding the priority of sound generation stopping of the tone generation channels, and a tone generation channel group consisting of a plurality of tone generation channels that generate sounds according to the control of the control section. , an assignment memory that the control section reads and writes to know the status of each sound channel, the status of the musical tone being output, and a channel stop priority that indicates the priority for stopping the sound of the sound channel. The monitor memory is comprised of a monitor memory for the control unit to read from and write to, and a pointer register indicating an address for the control unit to read from and write to the monitor memory.

With this configuration, the control section reads synthesis information including data regarding the number L1 of sound generation channels used for synthesis and data regarding the sound generation stop priority of the sound generation channels from the synthesis parameter memory in response to input musical tone information, Then, the state of each sound generation channel is read from the assignment memory, and the state of each sound generation channel is captured in an off sound generation channel, that is, an empty channel.

Li) When K, that is, when the required number of sound generation channels Li is larger than the current number of empty channels, the control section determines the number of empty channels that are insufficient among the Li sound generation channels necessary for the musical tone to be generated. , the sound generation of (Li-K) channels is stopped according to the stop priority of the sound generation channel currently generating sound, and after capturing L1 empty channels, an instruction to turn on the sound generation is issued.

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 section, 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, 7 is a pointer register, 1
0 to 12 are the 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 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.

(Hereinafter referred to as gold and white) Table 1: Number of sound generation channels Li to be used based on musical tone information such as timbre Q1 pitch H1 volume V, waveform W or envelope E to be sounded in each of the Li channels, and sound generation for each channel. Synthetic information consisting of pronunciation information such as data representing the stop priority P can be obtained.

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 on/off of each sound generation channel stored in the assignment memory 3 has contents as shown in Table 2, for example.

(hereinafter referred to as gold and white) When L1≦ in Table 2, the control unit 1 sequentially outputs the pronunciation information and pitch information read from the synthesis parameter memory 2 for Li pieces to the off pronunciation channel. At the same time as turning on the corresponding sound channel (
Write data indicating that Li pieces) are on. The control unit 1 also uses the monitor memory 6 indicated by the pointer register 7.
At the address within, there is data indicating that each of the Li sound channels to be used is on and each of the unused (M-Li) sound channels is off, and for each of the 51 sound channels that have been turned on. After writing the data regarding the channel stop priority read from the synthesis parameter memory 2, the contents of the pointer register 7 are incremented. 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.

As shown in Table 3, the monitor memory 6 shows the order in which each output musical tone was generated, the sound generation channel used for each musical tone, and the stop priority of the sound generation channel.

When Li>K, the control unit 1 reads the channel stop priorities of the sound generation channels from the monitor memory 6, and calculates the number of channels lacking in order from the channel with the highest stop priority (
Turn off the pronunciation channels corresponding to Li-, that is, capture the empty channels (in L-knee), sequentially output the pronunciation information and pitch information read from the synthesis parameter memory 2, and turn them on. Data indicating that the relevant sound generation channel (t, il) is on is written into the assignment memory 3. Further, as in the case of L1≦, the control section 1 writes data indicating the state of each sound generation channel to the address in the monitor memory θ indicated by the pointer register 7, and increments the contents of the pointer register 7.

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 6 and output as musical sound data.

In this way, according to this embodiment, musical tone information related to musical tones to be output, that is, musical tone synthesis information corresponding to timbre, pitch, and volume, that is, pronunciation information such as the number of pronunciation channels and the priority for stopping the pronunciation of each pronunciation channel, is synthesized. Since the parameters are stored in the memory, the parameters necessary for the same level of musical tone synthesis are stored in the parameter memory.
While changing the number of pronunciation channels for each musical tone as appropriate,
If the number of free channels is insufficient, turn off the missing channels in order of priority to stop sound, capture the desired number of free channels, and then assign them to an electronic device that can output musical sounds. 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.

Effects of the Invention The present invention arbitrarily sets an appropriate number of sound generation channels to be used for each musical tone to be output, so that the sound quality of various musical tones can be made to the same level, and furthermore, the number of sound generation channels used for each musical tone can be set to an appropriate number. By controlling , the number of simultaneous sounds can also be changed. Also, when the number of free sound channels is smaller than the number of used sound channels, the number of sound channels corresponding to the insufficient number of channels are turned off according to the sound stop priority assigned to each sound channel, and the number of free sound channels corresponding to the number of used sound channels is turned off. By assigning waveforms after capturing, it is possible to obtain a synthesized sound without significantly degrading the timbre of the musical tone.

[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... Pointer register, 10... First sound generation channel, 11...
...Second pronunciation channel, 12...Mth pronunciation channel.

Claims (1)

[Claims] a control unit that inputs musical tone information; and a control unit that provides synthesis information including data regarding the number of sound generation channels to be used and data regarding the sound generation stop priority of the sound generation channels corresponding to the musical tone information input to the control unit. a synthesis parameter memory to be supplied, a sound generation channel group consisting of a plurality of sound generation channels that generate sound according to the synthesis information output from the control section, and an assignment memory for the control section to read or write the state of each sound generation channel. , a monitor memory for the control unit to read or write a channel stop priority indicating the state of output sound generation and a priority for stopping sound generation of a musical tone channel; and a monitor memory for reading or writing to the monitor memory. a pointer register that indicates an address to the control section, and the control section captures a number of sound generation channels that are equal to or greater than the number of sound generation channels used that are included in the synthesis information supplied from the synthesis parameter memory. The electronic musical instrument is characterized in that the synthesis information is later output to the same number of the sound generation channels as the number of used channels.