JPH0863155A - A musical tone control device for an electronic musical instrument having a spaciousness reproducing function. - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides an electronic musical instrument equipped with a musical tone control device capable of obtaining the natural expansiveness of an acoustic musical instrument by controlling the envelope of each frequency band separately. The purpose is to do. According to the present invention, in an electronic musical instrument of a frequency division system, a storage unit that stores sampled data for each frequency band, and a waveform read from the storage unit according to tone color information, touch information, and range information. A read address generating means for designating an address, and an envelope generating means for generating and adding an envelope for each of the left and right frequency bands to the waveform data read from the storage means in accordance with the tone color information, touch information and range information. And means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frequency division sound source type electronic musical instrument, and by changing the envelope for each frequency band of the left and right channels, it is possible to reproduce a natural sound spread feeling such as an acoustic musical instrument. The present invention relates to an electronic musical instrument having a control device.

[0002]

2. Description of the Related Art In recent years, a wide variety of electronic musical instruments that employ a frequency division tone generator system have become widespread and widely used.

Usually, such an electronic musical instrument uses an electronic tone generator system and imparts various effects to the musical sound generated from the tone generator system, so that the musical instrument feels close to a natural feeling or a natural expression. The goal is to achieve musical sounds.

A method of imparting effects in these conventional electronic musical instruments will be described below with reference to the drawings.

FIG. 5 is a diagram for explaining the configuration and operation of the main part of a conventional musical tone control apparatus for an electronic musical instrument which uses mono-sampling data in a frequency division sound source system.

In the figure, each waveform memory 22h, 22m
, 22l is a waveform divided into a high frequency band and 22h is a waveform divided into an intermediate frequency band.
In m, the waveform divided into the low frequency band is stored in 22l.

Further, the read address generator 21 is supplied with key ON / OFF signals, tone color selection information, touch information indicating the pressed state of the key, and range information of the sound to be produced.

Therefore, the read address generator 21 is
At the timing indicated by the key on / off information, corresponding address information is generated based on the tone color selection information, the touch information, and the range information, for example, according to a built-in conversion table, and the high, medium, and low waveform memories 22h, 22m, Give to 22l. As a result, each waveform memory 22h, 22m, 22l
Will output the corresponding waveform.

At the same time, the key on / off signal, tone color selection information, touch information, and tone range selection information are also input to the envelope generator 23, and the envelope for each frequency band is read out from the envelope waveform memory. It is sent to the multipliers 24h, 24m and 24l.

The above-mentioned waveform memories 22h, 22m, 22
The waveform output from l and the output from the envelope generator 23 are multiplied by multipliers 24h, 24m, and 24l to add an envelope for each frequency band, and the added envelope is sent to the multiplier 25.

Next, after the outputs from the respective frequency bands are multiplied by the multiplier 25, the left and right channel multipliers 2
Sent to 7, 28.

On the other hand, the panning data generator 26 determines the volume output by the left and right speakers based on the transmitted range information and sends it to the multipliers 27 and 28.

That is, based on the range information indicating the sounding position of the sound to be sounded, for example, when a low tone is sounded by a piano,
The amount of left-side sound is large and the amount of right-side sound is small, and panning data outputs A and B in which the left and right volumes change complementarily as shown in FIG. 7 are generated.

The generated panning data is sent to the respective multipliers 27, 28, and the left channel (L) output and the right channel (R) are output from the multipliers 27, 28.
The output is multiplied and given a pan effect (localization), and then sent to each sound source system.

However, according to such a conventional method, a different envelope is added to each frequency band,
Although the control is performed for each frequency band, the envelopes added to the sounds distributed to the left and right speakers are the same in each band, and there is the problem that subtle changes in the sounds emitted from the left and right speakers cannot be expressed. It was

FIG. 6 is a diagram for explaining the structure and operation of the main part of a conventional musical tone control apparatus for an electronic musical instrument using stereo sampled data.

As shown in the figure, in this example, the left and right waveform data (L, R) stereo-recorded by the microphones arranged on the left and right are divided into high, middle, and low frequency bands, respectively, and this is divided into a waveform memory. 32 hL, 32 hR; 33 mL,
33mR; 34lL, 34lR are stored in advance, and this is taken out according to the output of the read address generator 31 similar to the above.

With respect to these outputs, the outputs of the envelope generator 35 for generating the outputs Eh, Em, El for each frequency band are multiplied by the multipliers 36L, 36R; 37L, 37.
R; sent to 38L, 38R, and the multipliers 36L, 36R;
37L, 37R; 38L, 38R are multiplied, and the left and right signals are further multiplied by the multipliers 39L, 39R to obtain a musical sound output.

When the stereo recorded data is used as described above, the pan data generator is not necessary because the sense of localization is added to the waveform data in advance, but the waveform data recorded for a long time is prepared. Must be
As a result, the data size becomes large, and a large-capacity waveform memory becomes indispensable, and the control accompanying this becomes complicated.

Also, the point that the envelope of the sound in each frequency band cannot be controlled for each of the left and right speakers is the same as in the first example described above.

The spread feeling of the stereo sound output in the above configuration will be described. The output from the left and right speaker devices has the same way of applying the left and right envelopes in each frequency band, and has a different audibility from the musical sound of the acoustic musical instrument.

For example, in the musical sound of a piano, the spread and attenuation of the sound to be produced are different in the high tone range and the low tone range, which causes a difference in the sensation from the left and right. Therefore, a natural musical tone cannot be obtained unless sound is produced in consideration of such conditions.

Therefore, in order to improve such unnaturalness and give a feeling of sound broadening, it is necessary to change the envelopes of the left and right sounds for each frequency band.

[0024]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. By controlling the envelopes of each frequency band on the left and right channels separately, the natural expansive feeling of an acoustic musical instrument can be obtained. An object of the present invention is to provide an electronic musical instrument equipped with a musical tone control device capable of performing the same.

[0025]

According to a first aspect of the present invention, in an electronic musical instrument which uses data monosampled by a frequency division method, a storage means 8 for storing the monosampled data for each frequency band, and a tone color. On the basis of the information, the touch information and the range information, the read address generating means 131 for designating the address of the waveform read from the storage means 8 and the waveform data read from the storage means 8 are added to the timbre information and the touch information. And envelope generating means 133L, 13L for generating and adding an envelope for each frequency band of the left and right channels in accordance with the range information.
And 3R.

A second aspect of the present invention comprises the panning data generating means 128 of the first aspect.

A third aspect of the invention is an electronic musical instrument which uses data stereo-sampled by a frequency division method, and a storage means 8 for storing the stereo-sampled data for each frequency band of left and right channels, timbre information and touch information. And the storage means 8 according to the range information.
Read address generating means 141 for designating the address of the waveform to be read from, and the waveform data read from the storage means, in accordance with tone color information, touch information, and range information, envelopes for each frequency band of the left and right channels. And envelope generating means 145L and 145R for generating.

[0028]

According to the present invention, in an electronic musical instrument of the frequency division sound source system, by using mono-sampled or stereo-sampled data, the envelope of the waveform for each frequency band is added to the left and right channels separately, thereby making it acoustic. It reproduces the natural sound-like spread of a musical instrument.

Therefore, in the first aspect of the invention, the electronic musical instrument using the mono-sampled waveform data has the envelope generating means 133L and 133R separately for the left and right channels, and the envelope generating means 133 is provided.
By L and 133R, an envelope is added for each frequency band to express a feeling of sound broadening.

As a result, the distribution of sounds by frequency band depending on the strength of the touch, the difference in the rate of decrease of sounds by frequency band, and the like can be controlled separately for the left and right channels, so that a subtle expression of sound spread can be expressed. It will be possible.

The second invention is the same as the first invention,
Further, a pan data generating means 128 is added to enhance the sound localization. As a result, the feeling of sound broadening is further improved.

A third aspect of the invention is an electronic musical instrument using stereo sampled waveform data, which has separate left and right envelope generating means 145L and 145R, and the envelope generating means 145L and 145R divides the envelope into left and right frequency bands. Is added to express the feeling of sound broadening.

As a result, the waveform data for each of the left and right frequency bands is directly divided into left and right by data such as the distribution of sounds by frequency band according to the strength of the touch and the difference in the reduction rate of sounds by frequency band. Since it can be controlled, it is possible to express a subtle sense of sound spread.

[0034]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram schematically showing the overall configuration of an electronic musical instrument according to the present invention.

In the figure, 1 is a central processing unit (hereinafter CP
U), and controls each part of the electronic musical instrument according to a control program stored in the program memory part of the ROM 3.

For example, the CPU 1 takes in a key on or off signal from the keyboard 5 on the premise of setting on the operation panel 6, and according to the data in this case, for example, tone color selection information, touch information, range information, etc., an event occurs. The key number and touch data of the selected key are calculated, and the pronunciation parameters are read out from the ROM 3 based on these.

These read data are sent to the musical tone generating section 7 to perform a process of generating a musical tone that matches a performance condition such as a predetermined tone color and pitch.

The operation panel 6 connected to the CPU 1 functions as a part of various coefficient setting means and an input means for playing conditions and the like.

In addition to this, a MIDI (Musical Instr.) Functioning as an interface for exchanging digital music data with another musical instrument or an external computer or the like.
ument Digital Interface).

A random access memory (hereinafter referred to as a RAM) 2 temporarily stores various data handled by the CPU 1, a work area of the CPU 1, various tables, registers, and flags for controlling the electronic musical instrument. Etc. are defined. Further, the RAM 2 is provided with an area for storing performance information sent from the outside and status information of the apparatus.

Read-only memory (hereinafter referred to as ROM)
3 stores a program for controlling the entire electronic musical instrument. Further, the ROM 3 stores various fixed data used by the CPU 1 in addition to the control program.

For example, tone generation parameters for generating a tone of a predetermined tone color are stored. This tone generation parameter is provided for each tone color and frequency band, and includes, for example, waveform address, frequency data, envelope data, filter coefficient, etc., and is accessed by the CPU 1 via the system bus 20.

In the display unit 4, the CPU 1 uses the system bus 20.
It displays various data sent via the. The display unit 4 includes LEDs that indicate various states of the electronic musical instrument,
It is composed of an LCD that displays various messages.
On this LCD, for example, the procedure at the time of editing is displayed.

The keyboard 5 comprises a plurality of keys and a key switch which opens and closes in conjunction with key press / release of these keys. The key press / key release operation of the keyboard 5 is detected by a keyboard scanning circuit (not shown). It The touch detection circuit directly related to the present invention is included in the keyboard 5.

On the operation panel section 6, in addition to the power switch,
Various switches are provided to set the timbre and rhythm. The tone color selection switch and the display 4 related to the present invention are provided on the operation panel section 6.

The musical tone generating section 7 reads out musical tone waveform data and envelope data corresponding to the signal output from the CPU 1 from the waveform memory 8 and the envelope waveform memory 9 and adds an envelope to the read musical tone waveform data as a musical tone signal. It is what is output.

For this reason, the tone generating section 7 includes a tone control device 13 directly related to the present invention in addition to the digital control oscillator for generating the tonic scale. The structure and function of the musical sound control device 13 will be described below with reference to FIGS.

The tone signals generated by the tone generating section 7 are D / A converters 10a, 10 for the left and right channels (L, R).
b. A waveform memory 8 for storing waveform data and an envelope waveform memory 9 for storing envelope data are connected to the tone generating section 7.

The waveform memory 8 stores musical tone waveform data corresponding to tone ranges and tone colors for each frequency band.
The tone waveform memory 8 is accessed based on the address generated by the read address generator 131 of the tone control device 13.

The envelope waveform memory 9 stores various envelope data corresponding to tone components such as tone color and touch intensity for each frequency band.

The envelope waveform memory 9 includes the left and right envelope generators 133L of the tone control device 13,
133R is accessed by using the contents of a tone component selection register (not shown) as an address.

The D / A converters 10a and 10b convert the inputted digital musical tone signal into an analog musical tone signal. The analog tone signals converted by the D / A converters 10a and 10b are supplied to the amplifiers 11a and 11b.

The amplifiers 11a and 11b are the D / A converter 1
The analog tone signals supplied from 0a and 10b are amplified with a predetermined gain. These amplifiers 11a and 11b
Is output to the speakers 12a and 12b.

The speakers 12a and 12b are connected to the amplifier 11
The analog musical tone signal as an electric signal sent from a and 11b is converted into an acoustic signal. That is, the musical tone is emitted according to the generated musical tone signal.

Each of these constituent elements corresponds to the system bus 20.
Via a CPU 1, a ROM 3 for storing data necessary for performance such as a control program, a random access memory (hereinafter referred to as RAM) 2 for storing variable data, a keyboard 5,
The display unit 4, the operation panel 6, and the musical sound generating unit 7 are interconnected.

The system bus 20 is composed of, for example, an address bus, a data bus, a control signal bus and the like, and exchanges signals between the connected elements. The tone generation section 7 includes digital / analog converters (D / A) 10a and 10b and amplifiers 11a and 11a.
Speaker devices 12a and 12b are connected via b.

FIG. 2 is a block diagram for explaining the structure and function of the main part of the musical tone control device 13 of the electronic musical instrument of the first invention, which is an embodiment in the case of using mono-sampled data. The musical tone control device 13 is included in the musical tone generating section 7 in the overall configuration diagram shown in FIG.

The circuit of the electronic musical instrument shown here includes a read address generator 131, waveform memories 132h, 132m and 132l for high, middle and low frequency bands, and envelope outputs EhL, EmL and ElL for left channel frequency bands.
A left channel envelope generator 133L,
Envelope output EhR for each frequency band of the right channel,
A right channel envelope generator 133R for generating EmR and ElR is provided, and further multipliers 134L, 134R, 135L, 135R and 13 for respectively multiplying signals are provided.
6L, 136R, 137L, 137R.

The read address generator 131 and the left and right envelope generators 133L and 133R have key ON / OFF signals, tone color selection information, as in the case of the prior art.
Touch information and range information are applied.

The read address generator 131 receives the key on / off signal, and based on the timing of the signal,
The address of the waveform data corresponding to the tone color selection information, the touch information, and the range information is determined and transmitted to the corresponding waveform memories 132h, 132m, 132l.

Waveform memory 132 receiving these signals
The waveform data corresponding to the address is read from h, 132m, and 132l. It should be noted that this waveform data is data recorded by a monaural recording technique, and the same data is separately output to the left and right channels.

In addition, the left and right envelope generators 133
L and 133R also read the corresponding envelopes from the envelope waveform memory 9 according to the respective information input according to the above-mentioned performance conditions, and output EhL, EmL,
ElL and EhR, EmR, ElR are generated and sent to their respective multipliers.

Each waveform memory 132h, 132m, 132
The waveform data read from l and the envelope data generated by each envelope generator are multiplied by the multipliers 134L, 134R, 135 for each channel.
L, 135R, 136L, 136R are combined for each of the left and right frequency bands, and an envelope is added to give a feeling of expansion.

Further, the outputs of the respective frequency bands are multiplied by the left and right channels in the multipliers 137L and 137R to become the sounds of the left and right channels.

The output of the musical tone generating section 7 formed in such a circuit configuration is a stereo signal, and for the waveform data output of each frequency band for each of the left and right channels,
The signals have different envelope data added thereto.

Therefore, the spread of the sound for each frequency band is given, and the natural spread of the acoustic musical instrument can be obtained.

In the configuration of this embodiment, there is no panning data generator. This is because the effect can be exhibited without panning in order to achieve a feeling of spread.

FIG. 3 is a block diagram showing a second embodiment for explaining the configuration and operation of the main part of the musical tone control apparatus for an electronic musical instrument of the second invention. Monosampling is the same as in the first embodiment. It is an example when using the obtained data.

This embodiment has substantially the same configuration as that of the first embodiment. Compared to the first embodiment, the panning data generator 128 and the left and right panning data generated by the generator 128 are provided for each channel. Multiplier 12 for multiplying
9L and 129R are newly added.

Therefore, description of the same parts as in the first embodiment will be omitted, and only the operation of the newly added parts will be described.

The read address generator 121, the waveform memories 122h, 122m, 122l, the left channel envelope generator 123L, the right channel envelope generator 123R, and the multipliers 124L, 124R, 125L, 125R, 12 for multiplying the respective outputs.
6L, 126R, 127L and 127R have the same configuration as that of FIG. Built-in waveform of waveform memory, input signal,
Information is also the same.

Each waveform memory 122h, 122m, 122
The waveform data read from l and the envelope data generated by the envelope generators 123L and 123R are multiplied by the left and right frequency bands to add the envelopes, and then the multipliers 127L and 127R generate the respective channels. Is multiplied by.

Further, the panning data generator 128
Receives the range information, reads the optimum panning data for the range from a memory (not shown), and sends the panning data to the multipliers 129L and 129R for each of the left and right channels.

The panning data generated in this manner is multiplied by the left and right channel signals previously synthesized by the multipliers 127L and 127R in the multipliers 129L and 129R to give a sense of localization. To be done.

The output of the tone generator 7 formed in such a circuit configuration is a stereo signal, and the envelope data and panning data for each frequency band of the left and right channels are added to the waveform data output for each of the left and right channels. It becomes a signal.

Therefore, a feeling of sound broadening for each frequency band is imparted, and further, a feeling of localization of the sound being sounded can be moved for each sound range, so that a natural feeling of broadening in an acoustic musical instrument can be obtained.

FIG. 4 is a block diagram for explaining the configuration and function of the main part of the musical tone control device 13 for an electronic musical instrument of the third invention, which is an embodiment in the case of using stereo sampled data.

In this embodiment, a stereo waveform memory is used as a sound source. Therefore, although the waveform memory is provided for each frequency band and left and right, the other read address generator 141 and the left channel envelope generator 145 are provided.
The basic configuration and function of the L and right channel envelope generators 145R are almost the same as in the embodiment of FIG.

In the case of this embodiment, the read address generator 141 and the left channel envelope generator 14 are used.
5L, the data generated by the right channel envelope generator 145R is the waveform memories 142hL, 142hR, 1h.
43 mL, 143 mR, 144 lL, 144 lR, and the point that they are separately sent for each of the left and right frequency bands.

For the outputs for the left and right channels obtained based on the address data obtained by the read address generator 141, the left channel envelope generator 145L and the right channel envelope generator 145R are used.
The respective envelope signals obtained by the multipliers 146L, 146R, 147L, 147R, 148
Multiplied at L, 148R.

The outputs of the left and right channels for each of the high, middle and low frequency bands thus multiplied are multiplied by the multipliers 149L and 149L.
In 9R, the left and right channels are multiplied. As a result, an electronic musical instrument with a built-in stereo sound source can be heard as naturally as an acoustic musical instrument.

In the present embodiment, stereo sampled data is used, and since a sense of localization and a sense of expansiveness are added directly based on the raw data, a more natural sound is obtained than in the first and second embodiments. A feeling of spread can be obtained.

[0083]

As described above in detail, according to the present invention, it is possible to provide an electronic musical instrument having a natural expanse like an acoustic musical instrument by controlling the envelope for each of the left and right frequency bands.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of an electronic musical instrument according to the present invention.

FIG. 2 is a block diagram of a first embodiment showing a configuration of a musical sound control device when a mono sound source is used.

FIG. 3 is a block diagram of a second embodiment showing a configuration of a musical sound control device when a mono sound source is used.

FIG. 4 is a block diagram of a third embodiment showing a configuration of a musical sound control device when a stereo sound source is used.

FIG. 5 is a diagram illustrating a localization feeling reproducing method according to a conventional technique in which a mono sound source is localized by a panning effect.

FIG. 6 is a diagram for explaining a conventional localization feeling reproducing method using a stereo sound source.

FIG. 7 is a diagram illustrating general characteristics of volume curves of left and right sound sources of a pan data generator.

[Explanation of symbols]

1 Central Processing Unit (CPU) 2 RAM 3 ROM 4 Display 5 Keyboard 6 Operation Panel 7 Musical Sound Generation 8 Waveform Memory (Storage Means) 9 Envelope Waveform Memory (Storage Means) 10a, 10b Digital / Analog Converter (D /
A) 11a. 11b Amplifier 12a, 12b Speaker device 13 Musical tone control device 20 System bus 121, 131, 141 Read address generator (address generating means) 122h, 122m, 122l, 132h, 132m,
132l waveform memory (storage means) 123L, 123R, 133L, 133R, 145L,
145R envelope generator (envelope generating means) 124L, 124R; 125L, 125R; 126L,
126R 134L, 134R; 135L, 135R; 136L,
136R 146L, 146R; 147L, 147R; 148L,
148R multiplier 127L, 127R, 137L, 137R, 149L,
149R multiplier 128 panning data generator 129L, 129R multiplier

Claims (3)

[Claims] 1. An electronic musical instrument using mono-sampled data in a frequency division system, wherein: storage means for storing the mono-sampled data for each frequency band; and reading for designating an address of a waveform read from the storage means. The address generation means and the waveform data read from the storage means generate an envelope for each frequency band independently for the left and right channels.
A musical tone control device for an electronic musical instrument having a spaciousness reproducing function, characterized in that it is provided with an envelope generating means to be added. 2. The musical tone control apparatus for an electronic musical instrument having a spaciousness reproducing function according to claim 1, further comprising a panning data generator. 3. An electronic musical instrument that uses data stereo-sampled by a frequency division method, comprising: storage means for storing the stereo-sampled data for each frequency band of the left and right channels; and a waveform address read from the storage means. A spread feeling reproducing function, which is provided with read address generating means for instructing and envelope generating means for generating and adding an envelope for each frequency band of the left and right channels to the waveform data read from the storage means. Tones control device for electronic musical instruments having a.