JP2852835B2 - Sound effect device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound effect device for an electronic musical instrument or the like, and more particularly, to a sound effect device having a signal modulating means, a signal delaying means and a signal mixing means. The present invention relates to a sound effect device capable of giving various effects including an effect that a plurality of players are playing, that is, an ensemble effect to an original sound.

[0002]

2. Description of the Related Art In an electronic musical instrument, for example, a keyboard or an electronic piano, a pseudo sound having a frequency in an audible band corresponding to a keyboard selected by a player is synthesized by an electronic calculation method. In this case, in addition to simply synthesizing a desired pseudo sound, the electronic musical instrument is provided with a switch, a volume, and the like corresponding to various sound effects, and a sound effect such as an ensemble effect corresponding to a player's selection of a switch or the like. Is generally added. Here, the ensemble effect is to give the listener an effect as if a plurality of players are playing even with one player, that is, a chorus effect or the like. As a result, the listener can obtain a sense of presence as if a plurality of players are playing in the performance hall. Therefore, how to achieve this ensemble effect in an electronic musical instrument is an important technique.

[0003] As such a sound effect device, a device as shown in FIG. 6 is known. The sound effect device 71 of FIG.
Has delay circuits 72, 73 and 74. Each signal wave input terminal 72a, 7 of each of the delay circuits 72, 73, 74
To 3a and 74a, original sounds that are artificially synthesized by means not shown are supplied. Further, the delay circuits 72 and 7
The output terminals 72b, 73b and 74b of the mixers 3 and 74 are connected to the input terminals 75a, 75b and 75c of the mixer 75. The output terminal 75d of the mixer 75
Is connected to an arithmetic unit (not shown).

In this acoustic effect device 71, delay circuits 72, 73, 7 are supplied from signal wave input terminals 72a, 73a, 74a.
The original sound input to 4 is delayed by mutually different delay amounts, and the three delayed signals are added by the mixer 75. In this case, since the original sound is temporally separated into three by being delayed by different delay amounts, three signals having the same frequency but different phases are added to the signal components added by the mixer 75. Will exist. As a result, an effect of performing by a plurality of persons, that is, an ensemble effect by a chorus effect is realized.

[0005]

However, such a conventional sound effect device has a simple circuit configuration, but has only a chorus effect as an ensemble effect, and has a stereophonic effect necessary for giving a sense of realism. There was a lack of feeling.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a simple circuit configuration, and in addition to a chorus effect, a stereo effect and sound can be heard in small increments or small increments. It is an object of the present invention to provide a sound effect device capable of obtaining an excellent ensemble effect having a tremolo effect.

[0007]

In order to achieve the above object, the sound effect device according to the first aspect of the present invention comprises a monaural original sound.
As an amplitude modulation means for a signal amplitude-modulated, a plurality of signal delay means for delaying each modulated plurality of amplitude-modulated signals mutually different delay amounts by the amplitude <br/> modulating means, a plurality of signal delay any combination of multiple <br/> delayed modulated signals output from the means, characterized in that that Yusuke <br/> a mixing means comprising a plurality of mixing circuit for outputting by adding another.

In this case, it is desirable that the signal delay means feeds back a part of the delay modulation signal to the input side of the signal delay means, and the mixing means includes an amplitude control circuit for controlling the amplitude level of the delay modulation signal. It is desirable to have. Further, the mixing means may add a monaural original sound in addition to the delay modulation signal.

Further, the sound effect device according to claim 5 of the present invention has a plurality of channels for transmitting stereo original, adding separates original sound of the stereo from at least two channels of the plurality of channels as an amplitude modulation means for amplitude modulating a first mixing means to produce a monaural signal, a monaural signal by, vibration
A plurality of signal delay means for delaying each multiple amplitude modulated signal modulated by the width modulation means mutually different delay amounts, respectively outputted from the plurality of signal delay means
Arbitrarily combine multiple delayed modulation signals and add them together
And a third mixing means having a plurality of mixing circuits for adding and outputting each of the output signals of the plurality of mixing circuits and the original stereo sound. It is characterized by the following.

In this case, it is preferable that the signal delay means feeds back a part of the delay modulation signal to the input side of the signal delay means, and the second mixing means controls the amplitude level of the delay modulation signal. It is desirable to have a control circuit.

[0011]

According to the sound effect device of the first aspect, since the monaural original sound is amplitude-modulated, the amplitude level of the original sound gradually increases or decreases. Then, this modulated signal becomes a plurality of different delayed modulated signals temporally and spatially separated through a plurality of delay circuits. Furthermore, the plurality of delay modulated signal are combined in any of a plurality of mixing circuit, Ru is added
By that, the monaural original sound is converted into a stereo signal, a plurality of different signals in the stereo signal is present. Further, when delay modulation signals having slightly different phases are added, a large number of intermodulation waves are generated because the delay modulation signals having different phases interfere with each other.

Next, according to the sound effect apparatus of the fifth aspect, a monaural original sound is produced by separating and adding a stereo original sound from at least two of a plurality of channels for transmitting the stereo original sound. The monaural original sound operates in the same manner as the above-described sound effect device according to claim 1, and is converted into a stereo signal. And
This stereo signal is added to a stereo original sound composed of signals of a plurality of channels to generate a new stereo signal. At that time, mutual interference newly occurs between the stereo original sound and the delay modulation signal generated from the monaural original sound. Therefore, there are various signals in the channel signal, such as the original stereo original sound, a plurality of different delayed modulation signals delayed after the amplitude modulation, and a large number of intermodulation waves newly generated by mutual interference. become.

Furthermore, in the acoustic effect device according to claim 1 or 5, the signal delay means feeds back a part of the delay modulation signal to the input side of the signal delay means, so that the phase is different and the amplitude level is small. A delayed modulation signal of the frequency is created, and a signal similar to a repetitive sound is present.

Further, by controlling the amplitude level of the delay modulation signal in the mixing means of the sound effect device according to the first aspect and the second mixing means of the sound effect device according to the fifth aspect, a plurality of stereo signals can be reproduced. Have the same frequency and different amplitudes, and the sound image position determined by these stereo signals changes.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments according to the present invention will be described below in detail with reference to the drawings. First, the configuration of the sound effect device according to the present invention will be described. In this embodiment, a computer is used, and processing is performed by software.
For convenience, the concept of the configuration of the sound effect device will be described first with reference to FIG. The sound effect device 1 includes a first mixing circuit (second mixing means) 2 and one modulation circuit 3
A second mixing means 9 having a plurality of signal delay means 4, 5, 6 and two mixing circuits 7, 8, a third mixing means 10 having two mixing circuits 30, 31; It comprises left and right channels 32 and 33.

The first mixing circuit 2 is for producing a monaural original sound by separating and adding the stereo original sound from the left and right channels 32 and 33 for transmitting the stereo original sound. Reference numerals 2b are respectively connected to a left speaker channel 32 and a right speaker channel 33 to which a stereo original sound artificially created corresponding to selection of a keyboard of an electronic musical instrument (not shown) is transmitted. The left and right channels 32 and 33 are connected to left and right stereo speakers via an arithmetic circuit (not shown), a D / A converter, and an audio amplifier, respectively. On the other hand, the output terminal 2c of the first mixing circuit 2
It is connected to the input terminal 3a of the modulation circuit 3.

The modulation circuit 3 performs amplitude modulation using a monaural original sound as a signal to be modulated, and has a built-in modulation wave generation circuit (not shown) capable of changing the frequency. In the present embodiment, a modulation signal whose amplitude has been modulated using a modulation wave having a frequency of 5 Hz is output from the output terminal 3b.
Output from

The signal delay means 4, 5, and 6 are for delaying the modulated signal with respect to time.
3, mixing circuits 14, 15, 16 for adding the modulation signal and the respective delay modulation signals fed back from the outputs of the delay circuits 11, 12, 13, a feedback amount setting circuit 17, for varying the feedback amount of the modulation signal, 1
8 and 19 respectively. Here, one input terminal 14a of the mixing circuits 14, 15, 16
15a and 16a are connected to the output terminal 3b of the modulation circuit,
The other input terminals 14b, 15b, 16b are respectively connected to the output sides of feedback setting circuits 17, 18, 19, and the output terminals 14c, 15c, 16c are connected to the delay circuit 1
1, 12, and 13 are connected to the input side, respectively. The output sides of the delay circuits 11, 12, 13 are connected to the input sides of the feedback amount setting circuits 17, 18, 19, respectively, and to the second mixing means 9. In this case, the delay amounts of the delay circuits 11, 12, and 13 are as follows:
By selecting a switch for setting the amount of delay provided in an electronic musical instrument (not shown), the player can freely set the switch.

The feedback amount setting circuits 17, 1
The feedback amounts 8 and 19 can be freely set to an arbitrary value between 1 and 0 by changing the feedback amount setting volume (not shown) by the player.

The second mixing means 9 combines three delayed modulation signals having different delay times and a monaural original sound and adds them.
8. The mixing circuits 7 and 8 are provided on the input side with amplitude control circuits 20, 21, 22, 23 and 24, 25, 26, 2 for controlling the amplitude of the delay modulation signal.
7, and mixing circuits 28 and 29 for combining and adding the delayed modulated signal and the monaural original sound whose amplitude is controlled. Amplitude control circuits 20, 21, 22,
The input side of 23 is connected to the output side of the delay circuits 11, 12, 13 and the output terminal 2c of the first mixing circuit 2, respectively, and the output side is all connected to the input side of the mixing circuit 28.

Similarly, the input sides of the amplitude control circuits 24, 25, 26 are connected to the output sides of the delay circuits 11, 12, 13 and the output terminal 2c of the first mixing circuit 2, respectively. It is connected to the input side of the mixing circuit 29.

In this case, the amplitude control circuits 20 to 27 have a function of multiplying the amplitude level of the modulation signal by a coefficient from 0 to 1.

The third mixing means 10 comprises mixing circuits 30 and 31 for adding the two delayed modulated signals added by the second mixing means 9 to the stereo original sounds of the left and right channels 32 and 33, respectively. Have been. One input side of the mixing circuits 30 and 31 is connected to the output side of the mixing circuits 28 and 29, respectively, and the other input side is connected to the left and right channels 32 and 33, respectively. The output side of the mixing circuits 30, 31 is connected to the left and right channels 32, 3
3 is connected to an arithmetic circuit (not shown).

Next, the operation of the sound effect device 1 according to the present invention will be described in detail with reference to FIGS. FIG.
1 shows a configuration of a DSP (Digital Signal Processor) constituting the sound effect device 1 of FIG. 1 in the present embodiment. This DSP has four identically configured DSPs.
(DSPa to DSPd), FIG.
Only the configuration a is shown as a representative, and the same circuits forming the DSP will be described below using the same reference numerals. The DSPa 41 includes a first mixing means 2 and a second mixing means 2.
Of the mixing means 9 of DSPb to DSPd
Performs operations of the delay circuits 11, 12, and 13, respectively. The DSPa and DSPb to DSPd are connected by a data bus via I / O (Input output) 50, respectively.

Next, the operation of the DSPa to DSPd of FIG. 2 is shown in FIG. 3 as a flowchart, and will be described in detail with reference to FIG. First, when a player selects a keyboard of an electronic musical instrument such as an electronic piano (not shown) and a switch corresponding to an ensemble effect, a microcomputer (not shown) (hereinafter referred to as a “CPU”) is built in a system controller (not shown). From original sound data RAM (not shown) storing waveforms corresponding to the above, stereo original sound data composed of signals of two left and right channels 32 and 33, each of which is a 24-bit digital signal, is repeated a predetermined number of times. Output to the left and right channels 32 and 33 in a cycle (step 101).

Next, the mixing operation by the first mixing circuit 2 of FIG. 1 will be described. The first mixing circuit 2 creates a monaural original sound by adding the stereo original sound (steps 102 to 104). Hereinafter, each step will be described in detail.

The CPU outputs the original sound data of the left channel 32, which is a 24-bit digital signal, from the original sound data RAM onto the data bus 42. The multiplier 45 takes in the original sound data from the data bus 42 and temporarily stores it in a data register (not shown) inside the multiplier 45. Next, in response to the player's selection of the ensemble effect,
The 16-bit coefficient data written in the coefficient RAM 43 is controlled by the CPU and stored in the coefficient RAM 4.
3 to the coefficient bus 44. Although the coefficient in this case is not particularly limited, it is assumed that 1 is selected in the present embodiment. The multiplier 45 stores the coefficient data in an internal coefficient register (not shown) and multiplies the stored original sound data. The data after multiplication is
Is stored in the buffer 47 via the adder 46 (step 102).

Next, the original sound data of the right channel 33 is
As in step 102, the data is taken into the multiplier 45 from the data bus 42 and multiplied by the coefficient data output from the coefficient RAM 43 (in this case, 1 is selected by the player as in step 101). Adder 46
(Step 103).

Thereafter, the original sound data of the left channel 32 already stored in the buffer 47 is taken into the adder 46, and the stereo original sound data composed of the two left and right channels 32 and 33 are added to produce a monaural original sound. Data. This data is stored at a predetermined address of the data RAM 49 via the buffer 48 (step 104). The above operation is performed at predetermined time intervals under the control of the CPU, whereby the adding operation of the first mixing circuit 2 is completed.

Next, the amplitude modulation operation by the modulation circuit 3 of FIG. 1 will be described. This modulating circuit 3 performs step 10
The amplitude modulation is performed on the monaural original sound data created in step 4 (step 105). The details will be described below. Data RAM4
9 is stored in the data bus 4
The data is temporarily stored in the data register inside the multiplier 45 through the line 2. Next, when the player selects the desired speed and depth of the tremolo effect, the CPU determines the frequency and amplitude level of the modulated wave, and the corresponding coefficient data is transferred from the coefficient RAM 43 via the coefficient bus 44. ,
It is stored in a coefficient register inside the multiplier. The multiplier 45 multiplies the stored original sound data by the coefficient data. Here, the coefficient data is determined as follows. First, the positive side and the negative side of the maximum absolute value of the amplitude level of the modulated wave corresponding to the maximum depth of the tremolo effect selectable by the player are set to +1 and −1, respectively. Then, the amplitude level in a predetermined period of the modulated wave corresponding to the tremolo effect selected by the player is divided by the above-described amplitude level corresponding to +1, and a value obtained by adding +1 to the resultant is a 16-bit digital signal. . Next, the data multiplied by the multiplier 45 is stored at a predetermined address of the data RAM 49 via the adder 46 and the buffer 48. The amplitude modulation operation is completed by repeating this operation (step 105).

The monaural original sound data stored in the data RAM 49 is read out on a data bus for each 24-bit data, output from the DSPa I / O 50, and output from the DSPb to DSPd I / O 50 and DSPd. The data is sequentially stored at predetermined addresses in the data RAM 49 of each DSP via the data bus 42 (step 106).

Next, the delay operation by the signal delay means 4 of FIG. 1 will be described. The delay circuit 1 of the signal delay means 4
1, 12, and 13 use the DSPb to DSPd in parallel and delay the amplitude-modulated original sound data by parallel processing under the control of the CPU in accordance with the delay amount selected by the player (step 107). To 109). In this embodiment, in DSPb to DSPd,
The operation will be described in detail assuming that 50 mSec, 100 mSec, and 150 mSec are set.

The monaural original sound data stored in the data RAM 49 of the DSPb is first output to the multiplier 45. Next, the coefficient (0.1 in this embodiment) selected by the player among the coefficients stored in the coefficient RAM 43 as the feedback amount is output to the multiplier 45 at the same time, and both are multiplied by the multiplier 45. You. The multiplied data is stored in the buffer 47 via the adder 46. This data is set by the feedback amount setting circuit 17 and becomes the feedback amount of the delay modulation signal fed back to the input side of the delay circuit 11. Next, the second data of the monaural original sound data subjected to the amplitude modulation is output from the data RAM 49 to the adder 46 via the multiplier 45. The adder 46 adds this data and the data previously stored in the buffer 47. The added data is stored as new data in the buffer 47, and the data RA is used as data following the first data of the modulation signal already stored in the data RAM 49.
It is stored at a predetermined address of M49.

Next, the data stored in the buffer 47 is input to the multiplier 45 and is again multiplied by the coefficient 0.1. The multiplied data is stored in the buffer 47 again. Then, the third data of the monaural original sound subjected to the amplitude modulation is output from the data RAM 49 to the adder 46 via the multiplier 45. The adder 46 adds this data and the data previously stored in the buffer 47. The added data is processed in the same manner as the operation already performed. As described above, the operation of adding 10% of the previous original sound to the next original sound is repeated one after another, so that the previous original sound exists as a repetitive sound in the monaural original sound data.

Next, the data stored in the data RAM 49 is stored in the data bus 42 and the I / O5 after 50 mSec has elapsed.
0, DSPa data R via DSPa I / O 50
It is stored in the AM 49 one after another. As a result, this data becomes a delay modulation signal generated by the delay circuit 11 (step 107). Similarly, 100 mSec, 150 m of delay circuits 12 and 13 are used by DSPc and DSPd.
A Sec delay operation is performed (steps 108 and 10).
9). Thus, the operations of the signal delay units 4, 5, and 6 are completed.

Next, the mixing operation by the second mixing means 9 in FIG. 1 will be described. The second mixing means 9 sets the data of the three delayed modulation signals delayed by the signal delay means 4 to a predetermined signal level according to the player's free selection, and Are combined and added to generate two data for the left and right channels 32 and 33 as a stereo signal (steps 110 and 111). The details will be described below.

First, the amplitude control circuits 20, 21, 2 in FIG.
Operations 2 and 23 will be described. Of the data of the delay modulation signal stored at a predetermined address of the data RAM 49, the data as the output of the delay circuit 11 is
, And is multiplied by the multiplier 45 with coefficient data as an appropriate amplitude attenuation amount output from the coefficient RAM 43 according to the player's selection. Here, the amplitude attenuation is not particularly limited, but is set to 1, and the same amplitude data as the delay modulation signal is input to the mixing circuit 28. The multiplied data is supplied to the buffer 4 via the adder 46.
7 temporarily. Next, the data as the output of the delay circuit 12 is output to the multiplier 45, and is multiplied by the coefficient data as an appropriate amplitude attenuation output from the coefficient RAM 43 according to the player's selection. The multiplied data is added to the data stored in the buffer 47 by the adder 46 and stored as new data in the buffer 47. It is assumed that 1 is selected as the coefficient for the data input from the delay circuit 12 as well. Next, the data as the output of the delay circuit 13 is output to the multiplier 45, and is multiplied by the coefficient data as an appropriate amplitude attenuation output from the coefficient RAM 43 by the player's selection.
The multiplied data is added to the previous data stored in the buffer 47 by the adder 46, and stored as stereo signal data at a predetermined address of the data RAM 49 via the buffer 48. Note that the delay circuit 1
It is also assumed that 1 is selected as the coefficient for the data input from 3. At this time, the output of the first mixing circuit 2 before the amplitude modulation is output to the multiplier 45 by the player's selection.
Can be added by the same method. By these adding operations, a plurality of different signals are present in the stereo signal. Thus, the operation of the mixing circuit 7 is completed (step 110). The same applies to the mixing circuit 8, and the data of those stereo signals is stored in the data RAM 49 (step 111). Thus, the mixing operation by the second mixing means 9 is completed.

By the above operation, the mixing circuits 28 and 29 in FIG. 1 can arbitrarily combine any one or all of the three delayed modulation signals and the monaural original sound before modulation, and At this time, the levels of all signals can be set freely.

Next, the mixing operation by the third mixing means 10 of FIG. 1 will be described. The third mixing means 10 includes the stereo signal data generated by the second mixing means 9 and the original left and right channels 32,
A new stereo signal is generated by adding the stereo original sound data composed of 33 signals (step 11).
2). The details will be described below.

The stereo signal data output from the mixing circuit 7 and stored in the DSPa data RAM 49 is output to the buffer 47 via the multiplier 45 and the adder 46. On the other hand, the original sound data of the left channel 32 already stored in the data RAM 49 is input to the adder 46 via the multiplier 45, and is added to the stereo signal data stored in the buffer 47. The added data becomes new stereo signal data created by the mixing circuit 30 of the third mixing means 10. This data is output to an arithmetic circuit (not shown) via the I / O 50. The original sound data of the right channel 33 is similarly added and output to an arithmetic circuit (not shown). Thus, the mixing operation by the third mixing means 10 is completed (step 112). By the above operation, a new left and right channel 3 is obtained by adding the stereo original sound composed of the signals of the two left and right channels 32 and 33 and the monaural original sound created from the original sound.
2,33 stereo original sounds are created.

FIG. 4 shows the sound image positions of the new left and right channel signals 32 and 33 created as described above. this is,
When the signals of the left and right channels 32 and 33 are converted to analog and amplified, and then connected to a speaker, each signal indicates the position of the sound source relative to the position of the speaker.

The sound image 51 is the original sound of the stereo left channel 32, and the sound image 52 is the original sound of the stereo right channel 33. Further, the sound images 53 and 54 perform amplitude modulation on the monaural original sound obtained by adding the original sounds of the left and right channels 32 and 33, and then modulate the modulated signals delayed by the delay circuits 11 and 12 by the amplitude control circuits 20 and 25. , Are multiplied by 1 as respective coefficients, and are mixed by mixing circuits 28 and 2
9 is a delay modulation signal after being output. Sound image 55
Is a delayed modulation signal obtained by multiplying the modulation signal delayed by the delay circuit 13 by 1 as a coefficient in the amplitude control circuit 22, and the sound image 56 is obtained by converting the modulation signal delayed by the delay circuit 13 into the amplitude control circuit 26. This is a delayed modulation signal after multiplication by 1 as a coefficient. The sound image 57 is a monaural original sound after the stereo original sounds of the left and right channels 32 and 33 are added by the first mixing circuit 2. Also,
The position 58 indicates the center position of the left and right speakers.

According to FIG. 4, when the delay modulation signals are selected by the mixing means 10 and added to each other, the signals of the new left and right channels 32 and 33 are added to the signals of the original left and right channels 32 and 33. Therefore, sound images 53, 54, including many signals having the same frequency and a delayed phase,
Since there are 55 and 56, a chorus effect can be realized. When the coefficients of the amplitude control circuits 20 to 27 are set to different values, modulated signals having the same delay amount and different amplitude levels are output from the left and right speakers,
A certain sound image localization is determined. Therefore, the amplitude limiting circuits 20 to 2
By changing the coefficient of 7, different sound image localizations can be obtained. As a result, the spread of the sound can be varied in various ways, and the sense of stereo is further increased. Furthermore, the presence of the amplitude-modulated signal makes it possible to realize an excellent ensemble effect that also has a tremolo effect that the sound can be heard in small increments or decreases.

FIG. 5 shows the phase relationship between the delayed modulation signals based on the monaural original sound added in the first mixing circuit 2. Reference numeral 61 denotes the original sound of the monaural signal added in the first mixing circuit 2;
4 is a modulated signal delayed by the delay circuit 11 corresponding to 53, and 63 is a modulated signal delayed by the delay circuit 13 corresponding to 55 in FIG. A modulation signal 64 is delayed by the delay circuit 12 corresponding to 54 in FIG.
Is a signal corresponding to 56 in FIG. 4 and is a modulated signal delayed by the delay circuit 13. According to FIG. 5, there are a plurality of signals having the same frequency which are greatly delayed in time with respect to the phase of the monaural original sound 61. Therefore, an effect as if a plurality of persons are playing, that is, a deep chorus effect is obtained. realizable. In this case, the delay time of the signal delay means 4, 5, 6 can be changed, so that the depth of the chorus effect can be freely changed. Also, the delay modulation signals 62 and 63 existing in the left and right channels 32 and 33, respectively.
However, since the amount of phase delay is different from that of the monaural original sound 61, the sounds output from the left and right speakers are not canceled out, and the sounds can be heard as if they were separately output from the left and right speakers. , The sound will spread. Further, if feedback is performed by the feedback amount setting circuit 17, the same signal remains, so that an echo effect of giving a repetitive sound can be realized.

As described above, according to the present embodiment, the first mixing circuit 2 adds the original sounds of the left and right channels 32 and 33, which are stereo signals, to produce a monaural original sound, and modulates the amplitude of the original sound. To generate a modulated signal, and separates the modulated signal temporally and spatially, and further adds the separated signals to form new left and right channels 3.
Since two or three stereo signals are generated and the original signals of the original left and right channels 32 and 33 are added, a tremolo effect is realized by amplitude modulation. In addition, since the separated modulated signals are added again, a chorus effect is realized. Further, since an echo effect is realized by the presence of the repetitive sound, an excellent ensemble effect can be obtained.

The present invention is not limited to the above embodiment. For example, the number of DSPs is not limited to four, but may be more than four.
Alternatively, it may be smaller. Further, the control method in the DSP can be appropriately changed without departing from the gist of the present invention.

[0047]

As described above, according to the present invention, the following remarkable effects can be obtained with a simple circuit configuration having only one amplitude modulation means. First, a chorus effect with multiple signals can be obtained, and
Arbitrary multiple modulation signals in multiple mixing circuits
And adding them to each other, it is possible to obtain a stereo effect in which various sound image positions can be set. In addition, a tremolo effect can be realized in which the sound can be heard as it gradually increases or decreases. Further, by feeding back a part of the delay modulation signal to the input side of the delay means, and by controlling the echo level by controlling the amplitude level of the delay modulation signal in the mixing means, the sound image position determined by the stereo signal changes. And various stereo effects are added, and therefore, an excellent ensemble effect can be realized.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a configuration of a sound effect device of the present invention.

FIG. 2 is a configuration diagram of a DSP in the sound effect device of the present invention.

FIG. 3 is a flowchart of an operation of the sound effect device of the present invention.

FIG. 4 is a diagram showing an example of a sound image position obtained by the sound effect device of the present invention.

FIG. 5 is a diagram showing an example of a phase relationship of a delay modulation signal obtained by the sound effect device of the present invention.

FIG. 6 is a diagram showing a conventional sound effect device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 acoustic effect device 2 first mixing means 3 modulation means 4 signal delay means 5 signal delay means 6 signal delay means 7 mixing circuit 8 mixing circuit 9 second mixing means 10 third mixing means 32 left channel 33 right channel

Claims (7)

(57) [Claims] 1. A and one amplitude modulating means for the monaural original signal is amplitude-modulated, it at different delay amounts a plurality of amplitude-modulated signal modulated by the amplitude modulation means
A plurality of signal delay means for respectively delaying a plurality of delay modulated signals respectively outputted from the plurality of signal delay means
Mixing means comprising a plurality of mixing circuits for arbitrarily combining and adding to each other for output. 2. The sound effect device according to claim 1, wherein the signal delay unit feeds back a part of the delay modulation signal to an input side of the signal delay unit. 3. The sound effect device according to claim 1, wherein said mixing means has an amplitude control circuit for controlling an amplitude level of said delay modulation signal. 4. The sound effect apparatus according to claim 1, wherein said mixing means adds a monaural original sound in addition to said delayed modulation signal. 5. It has a plurality of channels for transmitting a stereo original sound, and at least two of said plurality of channels are transmitted.
First mixing means for generating a monaural signal by separating and adding the stereo original sound from the two channels, and one oscillator for amplitude-modulating the monaural signal.
Width modulating means, and a plurality of modulated by the amplitude modulating means.
Set of a plurality of signal delay means for delaying respectively different delay amounts amplitude modulated signal, a plurality of delay modulated signals respectively outputted from the plurality of signal delay means any
Combined, the having a plurality of mixing circuit for outputting by adding the second mixing means comprising a plurality of mixing circuit and outputting the added together, and the original sound each and the stereo output signal of the plurality of mixing circuits 3. A sound effect device comprising: (3) a mixing means. 6. The sound effect device according to claim 5, wherein the signal delay unit feeds back a part of the delay modulation signal to an input side of the signal delay unit. 7. The acoustic effect device according to claim 5, wherein said second mixing means has an amplitude control circuit for controlling an amplitude level of said delay modulation signal.