JP2003167580A - Device and method for adding sound effect - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for adding sound effects which give abundant variations to music played by adding many effects to a musical sound, and to provide a method for the same. <P>SOLUTION: An operation part is provided for independently setting a parameter such as a pitch, a reproduction speed or a volume for each band when dividing all bands and outputting them by synthesizing them. Each parameter is independently set by the operation part, and many variations are given to the musical sound by the device for adding the sound effects. Various musical sounds are generated by suitably adjusting each parameter. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound effect adding device for adding various sound effects to a musical sound and a sound effect adding method for adding sound effects.

[0002]

2. Description of the Related Art Some people who enjoy music by playing music can play the music by adjusting the playback speed or the pitch when playing the music. And there are people who enjoy music different from the original music. In the sound effect adding device for adding such a sound effect, the length of the time axis is made constant and the pitch is changed, or the pitch is made constant and the length of the time axis is changed,
Variations are added to the music played by adding effects to the musical sounds. When changing the length of the time axis or the pitch of the musical sound when giving variations to the music to be reproduced, the time axis compression / expansion device and A pitch conversion device is used. When the musical sound is reproduced by the time axis compression / expansion device or the pitch conversion device, the effect is added to the musical sound so that the reproduced music has various variations.

However, with such a conventional sound effect adding apparatus, even if an effect is added to a musical sound, it is not possible to expect so many variations in the reproduced music.

Since some people who want to enjoy music by using such a sound effect adding device have little effect on the reproduced musical sound, there is a demand for increasing the effect added to the musical sound. Up And among these people, it is desired to develop a sound effect adding device that can enjoy a variety of music with more added effects.

[0005]

As described above, the conventional sound effect adding apparatus has a problem that the reproduced music lacks variations because the effect added to the musical sound is small.

Therefore, the sound effect adding apparatus of the present invention includes a sound effect adding apparatus and a sound effect adding method for adding sound effects by adding a lot of effects to a musical sound to give a rich variation to the reproduced music. The purpose is to provide.

[0007]

A sound effect adding apparatus according to the present invention comprises a band dividing means for dividing a musical sound into a plurality of partial band musical sounds for each frequency band, and a parameter representing a reproduction speed or a pitch for each frequency band. The playback speed or pitch of each partial band musical tone divided by the band splitting means is adjusted according to the operator for setting and the parameter representing the playback speed or pitch for each band set by the operator. By the adjusting means and the adjusting means,
And a synthesizer for synthesizing a plurality of partial band musical tones after the reproduction speed or pitch of each partial band musical tone is adjusted.

According to the above acoustic effect adding apparatus of the present invention,
By operating the above controls even during playback,
Since it is possible to change the playback speed or pitch for each frequency band, if the partial band musical tones for each frequency band for which the playback speed or pitch has been changed are combined by the above-mentioned synthesizing means, it is possible to play music with variations. You can

A sound effect adding method according to the present invention is a band dividing means for dividing a musical sound into a plurality of partial band musical sounds for each frequency band, and an operator for setting a parameter indicating a reproduction speed or a pitch for each frequency band. Adjusting means for adjusting the reproduction speed of each of the partial band musical tones divided by the band dividing means in accordance with a parameter representing the reproduction speed or pitch for each frequency band set by the operator. A synthesizing means for synthesizing a plurality of partial band musical tones after the reproduction speed or pitch is adjusted by the above, and the reproducing speed or the pitch is reproduced using the operator for each partial band musical tone divided by the band dividing means. Set the playback speed or pitch based on the set playback speed or pitch, and adjust the playback speed or pitch for each partial band tone by adjusting means. Sound effect adding method, which comprises combining the partial band tone by said synthesizing means from I.

According to the above sound effect adding method, the reproduction speed or pitch can be changed for each divided partial band musical tone of each frequency band, and the partial band of each frequency band whose reproduction speed or pitch has been changed. Various kinds of music can be played back by synthesizing musical tones using the synthesizing means.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

FIG. 1 is a hardware configuration diagram of a sound effect adding apparatus showing an embodiment of the present invention.

The sound effect adding apparatus 100 includes a CPU
10 and a digital signal processor (DSP) 20
Are provided, the DSP 20 is controlled by the CPU 10, and the reproduced waveform is generated by the DSP 20 as described later. Further, the waveform is also divided by this DSP, and the method of the division has already been disclosed in Japanese Patent Laid-Open No.
No. 00-29467 discloses a waveform division device.

Further, the sound effect adding apparatus 100 includes
A ROM 30, a first RAM 40, and a manipulator 50 are provided. The ROM 30 has a CPU 10 and a DSP.
A program representing the operation of 20 is stored in the DSP.
The program representing the operation of 20 is DS by the CPU 10.
It is transferred to P20. The first RAM 40 is the CPU 1
0 is used as a working memory, and the manipulator 50 is
The user of the sound effect adding device 100 instructs the CPU 10 to perform an operation.

Further, the sound effect adding apparatus 100 includes
An A / D converter 60, a second RAM 80, and a D / A converter 70 are provided. An analog signal representing the original waveform is input to the A / D converter 60 from the outside, and the analog signal is converted by the A / D converter 60 into a digital signal representing the original waveform. The original waveform data represented by this digital signal is transferred to the second RAM 80 via the DSP 20.
Stored in. As will be described later, based on the original waveform data stored in the second RAM 80, the DSP 20 generates a plurality of divided waveform data representing the partial band musical tones according to the present invention and stores them in the second RAM 80. Further, as will be described later, the DSP 20 generates a reproduction waveform in which the original waveform is processed by the synthesis parameter based on the plurality of partial band musical tones stored in the second RAM 80 and sends the reproduction waveform to the D / A converter 70. To be D / A converter 7
0 converts the digital signal representing the reproduced waveform generated by the DSP 20 or the digital signal generated by the DSP 20 and forming the divided waveform data stored in the second RAM 80 into an analog signal and outputs it to the outside.

The operation of the present invention will be described with reference to the conceptual diagram. FIG. 2 is a conceptual diagram showing a sound effect adding device and a sound effect adding method of the present invention.

FIG. 2 shows a sound effect adding apparatus 10 of the present invention.
0 and the concept of a method for adding a sound effect performed by this sound effect adding apparatus are shown.

First, the original waveform is input to the frequency band dividing section, and the waveform of the entire music is divided into band musical tones for each band. The partial band musical tones are stored in the respective storage areas of the waveform data storage means 81. The waveform data storage means 81 is the second RAM 80.
Equivalent to.

The start address of each storage area in the waveform data storage section 81 is given to the DSP 20 as a predetermined value. Here, these bands are distinguished as band band 1, band band 2, band band 3, band band 4, band band 5, and band band 6 from the one having the higher frequency band. In band band 1, a partial band musical tone having a frequency component of 3 KHz or more is stored in a storage area corresponding to that band, and in band band 2 a partial band musical tone having a frequency component of 1.5 KHz or more and less than 3 KHz is stored in that band. It is stored in the corresponding storage area of the corresponding waveform data storage unit 81. Below, in band band 3 750 Hz or more and less than 1.5 KHz, in band band 4 375 Hz or more and less than 750 Hz, band band 5 is greater than 100 Hz and less than 375 Hz, and in band band 6 partial band musical tones of 100 Hz or less are stored in the corresponding storage areas. Remembered.

The band partial musical tones stored in the waveform data storage 81 are supplied to the waveform synthesizer 22. The waveform synthesis unit 22 is supplied with parameters from the waveform synthesis parameter unit 40a, and the waveform synthesis unit 22 performs processing according to the synthesis parameters.

Here, in order to further understand the sound effect adding apparatus 100 of the present invention and the sound effect adding method performed by the present apparatus, description will be given with reference to FIG. FIG. 3 shows the waveform synthesizing unit 22 in the sound effect adding apparatus 100 of the present invention.
6 is a conceptual diagram showing the relationship between the operator and the manipulator 50. FIG. The waveform synthesis parameter 40a shown in FIG.
Buffers 41 to temporarily store parameters of pitch, time, and level set by 0
46 and.

The relationship between the waveform synthesizer 22 and the manipulator group 50 will be described with reference to FIG.

As shown in FIG. 3, a space between the manipulator group 50 and the waveform synthesizer 22 is set by the manipulator group 50.
Buffers 41 to 46 are provided for temporarily holding the parameter "pitch" indicating the pitch, the parameter "time" indicating the reproduction speed, and the parameter "level" indicating the volume. These buffers 41-
46 corresponds to the first RAM 40. Each of the buffers 41 to 46 temporarily holds the set parameters, and supplies the contents of the buffers 41 to 46 to the waveform synthesizing unit 22 in accordance with an instruction from the waveform synthesizing unit 22. The operation of the waveform synthesizer 22 is as shown in FIG.
This corresponds to the operation of P20. The timer 11 sets the supply timing from the buffer units 41 to 46 to the waveform synthesizing unit 22. The operation of the timer 11 corresponds to the operation of the CPU 10 in FIG.

A circuit for concretely realizing the waveform synthesizer 22 shown in FIG. 3 will be described with reference to FIG.

FIG. 4 is a schematic block diagram showing the operation of the waveform synthesizer 22.

On the left side of this schematic block diagram, six waveform storage means 81a to 81f, and synthesis parameter sections 41 to 4 are shown.
6 are shown, and six modulation processing units 22 are provided in the center.
a, ..., 22f are shown. The waveform data storage means 81a to 81f correspond to the second RAM 80 shown in FIG. 1, and the synthesis parameters 41 to 46 are the first RAM.
Corresponds to 40. Further, these modulation processing units 22a, ...
.., 22f also correspond to the DSP 20 shown in FIG. 6
, 22f include the waveform data of each band of each waveform data storage means and each buffer 41 ,.
, 46 are supplied to the modulation processing units 22a to 22f based on the instruction of the waveform address control unit 24.

The top address of each storage area of the waveform data storage sections 81a to 81f is stored in the waveform address control section 24 in the upper part of FIG. 4, and the data of each storage area is stored in the top address. The modulation processing unit 22a based on
~ 22f. The operation of the waveform address control unit 24 also corresponds to the operation of the DSP 20 in FIG. 1 as described above.

Further, on the right side of FIG. 4, addition circuits 23a to 23e are provided corresponding to the respective modulation processing units 22a to 22f.
, The partial band tone waveforms processed by the respective modulation processing units 22 are respectively added and synthesized by the adding circuits 23a to 23e.

FIG. 5 is a flow chart for causing the DSP 20 shown in FIG. 1 to perform a waveform synthesizing process. Hereinafter, description will be made with reference to FIG.

When the play button "PLAY", which is one of the operator groups included in the sound effect adding apparatus 100, is pressed and reproduction is instructed, the program shown in the flow chart of FIG. 5 is started. This operator group will be described later.

First, the integer n is set to 1 in step S51. Since the integer n is set to 1, the processing of the first band is performed in step S52. When each parameter of the first band is acquired from the buffer 41, the process proceeds to the next step S53.

In step S53, modulation processing is performed. When this modulation processing is performed, the second RAM 8
Waveform data of the partial band tone stored in 0
Supplied to SP20. Then, the waveform is modulated according to each parameter such as the pitch, the volume, and the reproduction speed, and the process proceeds to the next step S54.

In step S54, a band combining process is performed. The part of the adder circuit in FIG. 4 corresponds to this. Then, a series of these processes is repeated from n = 1 to 6, and the process is terminated when n becomes larger than the division number 6, and the process proceeds to the next step S57.

In the next step S57, a reproduction process is performed and output to the outside.

In the next step S58, it is determined whether or not the stop operator "STOP", which is a part of the operator group, has been pressed to give an end instruction. If the stop "STOP" is selected here, it is determined as YES,
Processing is completed.

The operation panel provided with the operator group 50 will be described with reference to FIG. FIG. 6 is a view showing the outer appearance of the operation panel of the sound effect adding apparatus according to one embodiment of the present invention.

As shown in FIG. 6, Band 1 corresponds to band band 1, Band 2 corresponds to band band 2, Band 3 corresponds to band band 3, Band 4 corresponds to band band 4 and Band 4 corresponds to band band 5. A Band 6 setting area is provided corresponding to Band 5 and band 6. In each setting area, a parameter "pitch" representing the pitch and a parameter "ti" representing the playback speed are shown.
Slide switches for setting three parameters of "me" and a parameter "level" indicating the volume are respectively provided.

Below these slide switches, there is provided a display section for displaying numerical values, and the numerical values are displayed according to the position of the slide switches.

Further, on the right side of FIG. 6, a play button "PLAY" for instructing reproduction, a stop button "STOP" for instructing reproduction end, and a button "EXIT" used for shifting to other processing of this processing. ], And reset buttons "RESET" for resetting all setting data are provided respectively. Further, there is also provided a part for setting and displaying a band delay for setting the delay time of each band.

In FIG. 6, for example, even if each component on the setting screen created on the screen of the LCD display panel is operated by using an operator such as a mouse or a joystick provided externally, The touch panel may be one that operates a switch component that is an operator like the operation panel of FIG.

Here, a detailed description will be given with reference to the reproduced waveform when the processing is performed by this flow.

First, FIG. 7 shows an original waveform of a musical tone signal when the operation of FIG. 6 is performed. The horizontal axis represents time and the vertical axis represents amplitude.

The tone represented by this original waveform is a simple drum phrase consisting of kick, snare and hi-hat, and the hi-hat is pronounced four times in one bar. This pattern is shown in FIG. This is a waveform when a musical tone before the parameter setting shown in FIG. 6 is reproduced. Hyatt is mainly represented by frequency components from 3 KHz to 22.05 KHz. Therefore, the hi-hat is operated to sound eight times by changing the time Time in the parameter of Band1.

That is, the waveform shown in FIG. 7 is changed to the waveform shown in FIG. 8 by setting the time parameter Time representing the reproduction speed to 200 as shown in FIG. In FIG. 6, since the time parameter indicating the reproduction speed of the band Band1 is set to 200, the band Ba
The time progression of only the partial waveform of nd1 is doubled, and the time progression of the waveform in the subsequent band has not changed. This is band Ba
This shows that only the partial waveform of nd1 is reproduced at double speed, and other bands are 1 when Band1 is used as a reference.
It means that the playback is performed at the playback time of / 2.

In FIG. 7, the hi-hat is pronounced four times in one bar, but in FIG. 8, the operation based on the change of Band1 time Time is performed based on the compression / expansion operation on the time axis, and eight times in one bar. The hi-hat is pronounced. The present applicant has proposed a compression / expansion device having a similar hardware configuration in Japanese Patent Application No. 8-271072.

Therefore, the highest frequency band Band
The compression and expansion of the time axis are performed only in 1, and Band
Only the time progression of the waveform in band 1 will be doubled.

In this way, the portion of the hi-hat which sounds four times in FIG. 7 is repeated twice at twice the speed in FIG. 8, and a total of eight times sound is reproduced.

Up to this point, when the time Time, which is a parameter indicating the reproduction speed, is operated, the waveform synthesizing unit 22
The effect of the present invention based on the time base compression / expansion operation of the above is shown.

The effect of the present invention is not limited to this, and the effect of changing the parameter representing the pitch in the present invention will be described with reference to FIGS. 9 to 12. FIG. 9 shows an example of setting of the operation panel. FIG. 10 is a diagram showing an original waveform serving as a reference when reproducing. Figure 1
FIG. 1 is a diagram showing a waveform before setting the panel shown in FIG. 9. At this time, the pitch is uniformly set to 5. FIG. 12 is a diagram showing a waveform when the setting shown in FIG. 9 is performed and brought close to the original waveform shown in FIG.

The adjustment of the overall waveform of the musical tone by the operation of the setting panel will be described with reference to FIGS. 11 and 12.

FIG. 11 shows a waveform output through the acoustic effect adding apparatus of the present invention. At this time, the parameter representing the pitch is set to 5, which is a uniform 5 semitones over the entire band. In FIG. 11, since the pitch is set to be raised by 5 semitones, the entire musical tone waveform has a spread toward the high frequency. In particular, in this spread, the portion indicated by b in FIG. 11 becomes a factor for generating a human voice that is not human. It is inferred that this is caused by the ascending movement in the band indicated by Band1 as a result of the adjustment, that is, in the component having a frequency wave number of 3 KHz or higher. That is, Band1
By uniformly raising the pitch of a semitone, the entire musical sound waveform moves toward higher frequencies. To adjust this, it is effective to adjust the pitch of the highest band band 1. Therefore, the pitch "pitch" is set to 1 and reset from 5 semitones to 1 semitone. However, even if only the pitch of the band Band1 is adjusted, that is not enough. Therefore, the parameter "LEVEL" representing the volume of each band is also adjusted. Therefore, as shown in FIG. 9, the parameter indicating the volume of the band Band2 is adjusted. For parameters other than the time representing the reproduction speed of the other bands Band2 to Band6, the parameters are set appropriately while checking the musical sound.

With such adjustment, the waveform shown in FIG. 12 is obtained.

A waveform having a spread as shown by B in FIG. 12 is suppressed as shown by b in FIG. This is the band Band after adjusting the band Band1.
2 and the band Band3, which represents the volume "LEV"
This is due to the adjustment of “EL”. This is an attempt to approximate the reproduced sound of the original waveform by adjusting the parameters of each band with respect to the entire waveform of the musical sound, which is nothing but changing the frequency characteristics of the entire waveform of the musical sound.

That is, the frequency characteristic of the entire musical tone waveform is adjusted by adjusting the parameter representing the volume of each band. This indicates that the formants are being adjusted.

Further, in FIG. 12, the portion indicated by A also has a band BA.
By adjusting the ND2 and the band Band3, the characteristic is changed to be closer to the original waveform than the waveform of the portion indicated by a in FIG. Band Band2 is 1.5 KHz to 3 KHz, and band Band3 is 0.75 KHz to 1.
The band up to 5 KHz is shown. The portion indicated by A in FIG. 12 is just a portion corresponding to these bands.

Further, it has been explained so far that the sound effect adding apparatus of the present invention can be adjusted to bring the entire musical tone waveform close to the original waveform, but finally, since the musical tone having completely different sound quality can be reproduced, Will be described.

FIG. 13 is a view showing the operation panel.

FIG. 14A shows the result when the parameters shown in the operation panel of FIG. 13 are set and adjusted.
It shows in (b).

Here, the parameter representing the pitch of the band Band3 is adjusted to modulate the waveform.

A parameter representing the pitch of the band Band3 is set to -10, and a musical tone having a pitch lowered by 10 semitones is reproduced.

In this way, the partial band tone in the band Band3 is lowered by 10 semitones, and the component of the portion indicated by B in FIG. 14 (a) moves to the lower frequency A in FIG. 14 (b). ing. At this time, the other band components are
There is no change between FIGS. 14A and 14B. Therefore, it is possible to reproduce musical tones having completely different tones.

As described above, according to the sound effect adding apparatus of the present invention, it is possible to generate the entire original tone waveform.
It is also possible to generate a musical tone waveform different from the original musical tone waveform.

By using the sound effect adding apparatus of the present invention, it is possible to reproduce a large number of musical sounds with variations.

Further, by using the sound effect adding apparatus of the present invention and changing the parameters in the middle of reproduction,
You can play a musical sound with variations while playing it.

Further, since the operation panel is provided with the display portion, it is possible to make the reproduced music have variations by performing the operation while confirming the situation.

Furthermore, since the parameters can be adjusted while listening to the musical sound, it is possible to adjust the music to the atmosphere at that time while adjusting in the middle of the reproduction.

As described above, in the sound effect adding apparatus and the sound effect adding method according to the present invention, by dividing a musical sound into each band partial musical sound, an effect is given to each divided musical sound, and an effect is given to each band. Various sound effects can be given by synthesizing the given partial band musical tones.

[0068]

As described above, according to the present invention,
It is possible to provide a sound effect adding device and a method for adding sound effects, which add a lot of effects to a musical sound to give a wide variety of reproduced music.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration of a sound effect adding device according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram showing a concept of a sound effect adding device according to an embodiment of the present invention.

FIG. 3 is a conceptual diagram showing a concept of a waveform synthesis parameter section in FIG.

FIG. 4 is a conceptual diagram showing the concept of the waveform synthesis processing unit in FIG.

5 is a diagram showing a procedure of a reproduction process performed by the DSP of FIG.

FIG. 6 is a diagram showing an operation panel when a parameter representing a reproduction speed is adjusted by the operator group of FIG.

FIG. 7 is a diagram showing a current waveform of a musical tone signal when the operation of FIG. 6 is performed.

FIG. 8 is a diagram showing a waveform of a reproduced musical tone signal when the operation of FIG. 6 is performed.

9 is an operation panel diagram in the case of adjusting a parameter representing a pitch with the operator group of FIG.

FIG. 10 is a diagram showing an original waveform of a musical sound.

FIG. 11 is a diagram showing a waveform reproduced when 5 is uniformly set as a parameter representing a pitch among the parameters set in FIG. 9.

FIG. 12 is a diagram showing a waveform reproduced when a parameter is set in FIG. 9 and a parameter indicating a sound volume is adjusted.

FIG. 13 is a diagram showing an operation panel when another parameter is changed in the operator group.

FIG. 14 is a diagram showing a waveform when a musical sound is reproduced based on the parameters set in FIG.

[Explanation of symbols]

10 CPU 20 DSP 30 ROM 40 80 RAM 50 manipulator groups 60 A / D converter 70 D / A converter 100 sound effect addition device

Claims (2)

[Claims] 1. A band dividing means for dividing a musical tone into a plurality of partial band musical tones for each frequency band, an operator for setting a parameter indicating a reproduction speed or a pitch for each frequency band, and an operator for setting the parameter. According to the parameter representing the reproduction speed or pitch for each band, the adjusting means for adjusting the reproduction speed or pitch of each partial band musical tone divided by the band dividing means, and the reproduction speed or pitch by the adjusting means. A sound effect adding device comprising: a synthesizing unit that synthesizes a plurality of adjusted partial band musical tones. 2. A band dividing means for dividing a musical tone into a plurality of partial band musical tones for each frequency band, a manipulator for setting a parameter indicating a reproduction speed or a pitch for each frequency band, and the manipulator. Adjusting means for adjusting the reproducing speed or pitch of each partial band musical tone divided by the band dividing means according to the parameter representing the reproducing speed or pitch for each frequency band, and the reproducing speed or pitch by the adjusting means. And a synthesizing means for synthesizing a plurality of partial band musical tones after being adjusted, for each partial band musical tone divided by the band dividing means, a playback speed or pitch is set by using the operator. Before changing the playback speed or pitch for each partial band tone by adjusting means based on the set playback speed or pitch Sound effect adding method characterized by combining the sub-band tone by synthetic means.