JP2658764B2 - Electronic musical instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument for controlling a musical tone using an envelope.

[0002]

2. Description of the Related Art As is well known, various electronic musical instruments for giving various effects to generated musical sounds have been developed. For example, electronic musical instruments having an effector such as a compressor or an exciter are known, and these perform an effect extraction by extracting an envelope from a musical sound waveform and using an envelope thereof.

FIG. 4 is a block diagram showing a configuration example of a compressor provided in a conventional electronic musical instrument. In this figure, reference numeral 51 denotes an envelope extraction unit, which is composed of a full-wave rectification circuit 51a and a smoothing circuit (usually a low-pass filter is used) 51b. The envelope extractor 51 fetches a tone signal Ms from a sound source (not shown), and converts the envelope signal EN from the tone signal Ms.
Extract V.

Reference numeral 52 denotes a coefficient generator. The coefficient generation unit 52 takes in the extracted envelope signal ENV and generates a compression coefficient a that changes according to the input level, for example, as shown in the graph of FIG. That is, when the input level (horizontal axis) of the envelope signal ENV is equal to or lower than the predetermined threshold TH, the generated compression coefficient a
(Vertical axis) always takes the value “1”, but when the input level continues to increase linearly beyond the threshold TH, the compression coefficient a takes a value represented by the curve CV (a <1).

[0005] Returning to Fig. 4, the configuration will be described again.
53 is a multiplier, which is a tone signal Ms supplied from a sound source.
Is multiplied by the compression coefficient a generated by the coefficient generation unit 52, and the result is output as the tone signal Ms' after the effect is given.

According to such a configuration, for example, as shown in the graph of FIG. 6, the input level of the tone signal Ms (horizontal axis)
Is assumed to increase linearly, the threshold T
At an input level equal to or higher than H ', the output level (vertical axis) of the tone signal Ms' is suppressed as represented by the curve CV'.

[0007]

In a conventional electronic musical instrument provided with an effector for extracting an envelope, such as the above-mentioned compressor, a low-pass filter is used in the smoothing circuit, and the response is poor due to its characteristics. There was a problem. When a low-pass filter is used,
Since the extracted envelope waveform is not completely smooth, there has been a problem that the fluctuation has an adverse effect on the generated musical sound. Further, the low-pass filter has a problem that it is not suitable for envelope extraction because the output waveform varies depending on the pitch and harmonic components of the input waveform.

The present invention has been made under such a background, and improves responsiveness when applying an effect in accordance with the level of a musical tone signal output from a sound source, and provides a good effect. It is intended to provide an electronic musical instrument.

[0009]

[Means for Solving the Problems ] To solve the above-mentioned problems.
Therefore, according to the first aspect of the present invention, a plurality of tone signals are simultaneously transmitted.
Music tone generating means capable of generating the
Envelope generating means capable of simultaneously generating a plurality of envelope signals, and the envelope corresponding to each tone signal.
Multiplying the Beropu signal, and the envelope imparting means for outputting a result, the effect on the output of the envelope imparting means
Effect providing means for providing the plurality of envelopes.
The effect of accumulating the loop signal and giving it based on this accumulated value
And an effect imparting means for controlling The invention according to claim 2 is an electronic device according to claim 1.
In the musical instrument, the musical tone generating means may include a plurality of different tone colors.
Means that can generate the same tone signal at the same time.
The effect imparting means generates an envelope signal for each tone.
Accumulate and control the effect given to each tone based on each accumulated value.
It is characterized by controlling.

[0010]

According to the first aspect of the present invention, the musical sound generating means includes:
Envelope generation means for simultaneously generating multiple tone signals
Simultaneously outputs multiple envelope signals corresponding to each tone signal.
Occurs, the envelope assigning means outputs the tone signal
Multiplied by the corresponding envelope signal and output
The effect applying means accumulates the plurality of envelope signals.
Based on the accumulated value, and
Controls the effect applied to the output of the stage. This allows
An effect is provided based on the accumulated value of the envelope signal.
According to the second aspect of the present invention, the musical sound generating means includes a sound generator.
When multiple tone signals of different colors are generated simultaneously,
Means accumulates the envelope signal for each of these tones
And controls the effect given to each tone based on each accumulated value.
You.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. A: First Embodiment FIG. 1 is a block diagram showing a configuration of a first embodiment of the present invention. The embodiment shown in this figure is applied to an electronic musical instrument equipped with a compressor. In the figure, 1
Is a keyboard part. The keyboard unit 1 has a keyboard composed of a plurality of keys, detects a key press / release operation for each key, and generates an operation signal Op corresponding to the key press / release operation. Reference numeral 2 denotes a control unit for controlling each unit of the apparatus, and a CPU (Central Processing Unit)
And a memory. The control unit 2 generates various tone control signals Mc (including control signals for key-on / key-off, pitch, volume, etc., as well as envelope generation parameters, etc.) corresponding to the operation signal Op supplied from the keyboard unit 1. .

Reference numeral 3 denotes a sound source, which has 16 channels ch0.
To ch15. This sound source 3 is a tone generator 3
a, envelope generator (hereinafter abbreviated as EG) 3
b, a multiplier 3c and an accumulator 3d.
The tone generator 3a generates different tone signals Ms0 to Ms15 for each of the channels ch0 to ch15 based on the tone control signal Mc supplied from the controller 2, and outputs them in a time-division manner.

The EG 3b is provided for each channel based on the envelope generation parameters of the attack rate AR, the decay rate DR, the decay level DL, the sustain rate SR and the release rate RR included in the tone control signal Mc supplied from the control section 2. Envelope signal E corresponding to musical sound signals Ms0 to Ms15 of ch0 to ch15
NV0 to ENV15 are generated and output in a time-division manner. Also, in this case, the envelope signals ENV0 to ENV
V15 is the touch data T included in the tone control signal Mc.
C, key scaling data KS, pan data PN, and the like.

The multiplier 3c multiplies the tone signals Ms0 to Ms15 supplied from the tone generator 3a and the envelope signals ENV0 to ENV15 supplied from the EG 3b for each of the channels ch0 to ch15, and divides the result by time division. To output. The accumulating unit 3d accumulates all the multiplication results for the 16 channels supplied from the multiplier 3c in a time-division manner, and outputs the result Msum.

Reference numeral 4 denotes a compressor, which comprises an envelope accumulating section 4a, a coefficient generating section 4b, and a multiplier 4c. The envelope accumulating unit 4a includes 16 channels of envelope signals ENV0 to ENV0 supplied from the EG 3b.
ENV15 is all accumulated, and as a result, ENVsum is output. The coefficient generation unit 4b generates a compression coefficient k corresponding to the accumulation result ENVsum of the envelope accumulation unit 4a, and outputs the compression coefficient k. The multiplier 4c calculates the accumulation result Ms of the accumulation unit 3d.
um is multiplied by the compression coefficient k generated by the coefficient generation unit 4b, and the result Msum 'is supplied to a sound system (not shown).

According to such a configuration, the envelope signals ENV0 to ENV15 generated by the EG 3b are:
A tone signal M generated by the tone generator 3a in the sound source 3.
While being multiplied by s0 to Ms15, it is also supplied to the compressor 4. In the compressor 4, the envelope signals ENV0 to ENV15 supplied from the sound source 3 are accumulated by the accumulator 4a.
Is accumulated according to the accumulation result ENVsum.
The coefficient generator 4b generates a compression coefficient k.

The tone signal output from the sound source 3 is multiplied by a compression coefficient k in the compressor 4 and then supplied to the sound system as a compressed tone signal Msum ', and is emitted from the speaker as a tone. .

As described above, in this embodiment, the envelope signal E multiplied by the tone signals Ms0 to Ms15 in the sound source 3
NV0 to ENV15 are supplied to the compressor 4 as they are, whereby the compression coefficient k is controlled.
Therefore, it is not necessary to provide a low-pass filter for extracting the envelope in the compressor 4 as in the related art.

As a result, the generated musical tone has improved responsiveness to the output waveform of the sound source and has a good envelope characteristic.

B: Second Embodiment Next, a second embodiment of the present invention will be described. FIG. 2 is a block diagram showing the configuration of the second embodiment of the present invention.
The embodiment shown in this figure is applied to an electronic musical instrument having a noise gate. In this figure,
Components common to those shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 2, reference numeral 21 denotes an effect imparting unit such as an equalizer. The effect imparting unit 21 imparts an effect such as changing a frequency characteristic to the accumulation result Msum of the musical tone signal supplied from the accumulation unit 3d. 22 is a comparison unit. The comparison unit 22 calculates the accumulation result ENVsum of the envelope signal supplied from the envelope accumulation unit 4a.
Is compared with the threshold TH ″, and a control signal corresponding to the comparison result is supplied to the noise gate 23.

That is, when the accumulated result ENVsum of the envelope is larger than the threshold TH ″, the noise gate 23 supplies the output Msum ′ of the effect imparting unit 21 to a sound system (not shown), and the accumulated result ENVsum of the envelope is supplied to the threshold. If it is smaller than TH ″, the output Msum ′ of the effect applying section 21 is cut off.

According to such a configuration, when the level of a musical tone falls below a predetermined level, a musical tone signal is not supplied to the sound system, and no sound is produced. Along with this, limit cycle noise generated by the characteristics of the effect imparting unit 21 is cut at a low level, so that unpleasant noise is removed from low-level musical sounds.

C: Third Embodiment Next, a third embodiment of the present invention will be described. FIG. 3 is a block diagram showing the configuration of the third embodiment of the present invention.
The embodiment shown in this figure is applied to an electronic musical instrument having a multi-effector. Also, in this figure, parts common to the respective parts shown in FIG. 1 or FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 3, EF1, EF2, EF3
... is an effector. These effectors EF1, E
Are output from the tone generator 3a in a time-sharing manner.
Of the six channel tone signals Ms0 to Ms15, different effects are given to the tone signals of the channels (there may be a plurality of channels) assigned to the respective tone colors. Each effector EF1, EF2,
Are accumulators EV1, EV2,... Accumulating envelope signals corresponding to the assigned channels.
And an effect is given according to the accumulation result.

That is, when channels ch0, ch2 and ch5 are assigned to the effector EF1, for example, the tone signals Ms0, Ms2 and Ms5 corresponding to the channels ch0, ch2 and ch5 are assigned to the effector EF1.
And the corresponding envelope signals EF0, EF2 and EF5 are supplied and accumulated by the accumulator EV1.

Next, 31 is an envelope distributor.
The distribution unit 31 takes in the envelope signals ENV0 to ENV15 supplied from the EG 3b in a time-division manner, and receives them according to the effector instruction signals supplied from the shift register 32 to the corresponding effectors EF1 and EF1.
F2, and output.

The shift register 32 writes the effector instruction signal supplied from the control unit 2 (not shown) via the selector 33, and synchronizes with the timing at which the envelope signal is output from the EG 3b, thereby synchronizing the channel of the envelope signal. Is supplied to the distribution unit 31. Such an operation is repeatedly performed each time the envelope signal is output from the EG 3b.

Next, 34 is an adder. This adder 3
4 accumulates the tone signals after the effects are output from the effectors EF1, EF2,... And supplies the result to a sound system (not shown).

According to such a configuration, the tone signals assigned to each of the plurality of different effectors EF1, EF2,...
In parallel with this, an envelope signal corresponding to the channel of the assigned tone signal is supplied. And
Each of the effectors EF1, EF2,... Gives an effect to the supplied tone signal in accordance with the envelope accumulated by the corresponding accumulator EV1, EV2,.

Thus, each of the effectors EF1, EF2,.
The tone signal given a different effect for each tone by
After being accumulated by the adder 34, it is supplied to the sound system and is pronounced as a musical tone. Thereby, the sound source 3
(Not shown), an effect corresponding to the envelope applied to the musical tone is added to the generated musical tone for each tone color.

In this embodiment, all the effectors EF1, EF2,... Are controlled by an envelope. However, the present invention is not limited to such a mode, and some effectors may be controlled without using an envelope. It may be. Further, in this embodiment, the tone signal is assigned to a different effector depending on the tone color difference. However, when each effector EF1, EF2,... Gives, for example, different effects in parallel to the same tone signal, The envelope accumulators EV1, EV2,... May be configured in common.

The present invention is not limited to the three embodiments described above, but is also applicable to reverb level control according to the input level of the envelope, balance control between direct sound and reverb, and the like. .

[0034]

As described above, according to the first aspect of the present invention,
According to Ming, the effect is based on the accumulated value of the envelope signal.
Controls the music generated by electronic musical instruments
The effect can be controlled based on the total volume of the sound. or,
According to the second aspect of the invention, an envelope signal is provided for each tone color.
The effect is controlled based on the accumulated value of
Controls the effect given to each tone based on the total volume for each tone
can do.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a third embodiment of the present invention.

FIG. 4 is a block diagram illustrating a configuration example of a compressor provided in a conventional electronic musical instrument.

FIG. 5 is a graph showing characteristics of coefficients generated by the compressor.

FIG. 6 is a graph showing characteristics of a tone signal compressed by the compressor.

[Explanation of symbols]

1 ... keyboard part, 2 ... control part, 3 ... sound source, 3a ... tone generation part, 3b ... envelope generator, 3c,
4c Multiplier, 3d Accumulator, 4 Compressor, 4a Envelope accumulator, 4b Coefficient generator, 21 Effect imparting unit, 22 Comparison unit, 23 Noise Gate 31 Envelope distribution unit 32 Shift register 33 Selector 34 Adder

Claims (2)

(57) [Claims] 1. A tone generating means capable of simultaneously generating a plurality of tone signals, and a plurality of envelope signals corresponding to the tone signals.
Envelope generating means that can be generated at any one time, an envelope providing means for multiplying each of the tone signals by the corresponding envelope signal, and outputting the result, and an effect of giving an effect to an output of the envelope providing means.
Providing means for accumulating the plurality of envelope signals
An electronic musical instrument comprising: an effect applying unit that controls an effect to be applied based on the accumulated value . 2. The electronic musical instrument according to claim 1, wherein The tone generator generates a plurality of tone signals having different timbres.
It is a musical sound generating means that can be generated at times, The effect applying means includes an envelope signal for each of the tone colors.
Is accumulated and the effect given to each tone based on each accumulated value
An electronic musical instrument characterized by being controlled.