JP7010970B2 - Musical tone effect imparting device and musical tone effect imparting program - Google Patents

Description

The present invention relates to a musical tone effect imparting device and a musical tone effect imparting program.

Conventionally, as a device for imparting a musical effect to a musical tone signal, a flanger using delay time modulation, a phaser using phase quantity modulation, and the like are known.
In such a musical sound effect imparting device, Patent Document 1 discloses a device that generates an infinite scale. The musical sound effect imparting device described in Patent Document 1 includes a pitch shifter group, a phase shift group, and an adder.

In this musical tone effect imparting device, a plurality of pitch shifters constituting a pitch shifter group perform a pitch shift with a predetermined shift amount with respect to a musical tone signal supplied from the outside, and a plurality of phase shifters constituting the phase shifter group are used. , The oscillation signal is phase-delayed by a predetermined phase amount, and the adder adds the pitch shift signals by all the pitch shifters.
Then, by configuring the delay amount of the phase delay signal given to each pitch shifter to be larger by a predetermined phase amount for each pitch shifter, it is possible to give a feeling of pitch increase or decrease to the external musical tone signal. It works.

Japanese Patent No. 4678871

However, in the technique described in Patent Document 1, when the pitch shift amount of any of the pitch shifters reaches the upper limit and then shifts from the lower limit pitch amount again, the pitch shift sound is discontinuous due to a sudden signal change. There is the problem that change will occur.
Therefore, in the technique described in Patent Document 1, there is a method of providing a waveform converter and multiplying a pitch shift signal by a trapezoidal wave signal to reduce a feeling of discontinuity when shifting from an upper limit value to a lower limit value. Although it has been proposed, there is a problem that the process of imparting the effect becomes complicated.

An object of the present invention is to provide a musical tone effect imparting device and a musical tone effect imparting program capable of imparting an infinite scale effect without performing complicated processing.

The musical sound effect imparting device of the present invention has a periodic signal generation unit that generates a periodic signal synchronized with the period of n beats or 1 / n beats (n is an integer) of the musical sound signal of the music data, and a periodic signal generating unit synchronized with the periodic signal. , A sound that shifts the acoustic signals generated from each of the plurality of acoustic signal generators that generate acoustic signals that continuously shift the pitch in octave units and the plurality of acoustic signal generators to different pitches. It is characterized by having a high shift portion.

The musical tone effect imparting program of the present invention is characterized in that the computer functions as any of the above-mentioned musical tone effect imparting devices.
The present invention can also exhibit the same actions and effects as described above.

The schematic diagram which shows the music data reproduction control system which concerns on embodiment of this invention. The schematic diagram which shows the switch group for operating the musical tone effect imparting apparatus in the said Embodiment. The functional block diagram which shows the structure of the musical tone effect imparting apparatus in the said Embodiment. The graph which shows the volume adjustment of the original sound and the effect sound by the level adjustment part in the said embodiment. The schematic diagram for demonstrating the operation in the said Embodiment.

[1] Overall Configuration Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a music data reproduction control system 1 according to an embodiment of the present invention. The music data reproduction control system 1 is connected to a computer 2 via a USB cable 3 to the computer 2. It is equipped with a DJ controller 4.
The computer 2 includes a storage device such as a CPU and a hard disk, and reproduces music data such as MP3s stored in the storage device. The music data is reproduced by software executed on the CPU, and the reproduced music data is output to the DJ controller 4 via the USB cable 3. Further, the reproduction control signal generated by operating the mixer unit 41, the deck units 42L, and 42R of the DJ controller 4 is output to the USB cable 3 and input to the computer 2. The computer 2 imparts various acoustic effects to the music data being reproduced based on the reproduction control signal output from the DJ controller 4.

The DJ controller 4 exemplified as an audio device includes a mixer unit 41 arranged in the center and deck units 42L and 42R arranged on the left and right sides of the mixer unit 41. The audio device according to the present invention is a concept including not only an acoustic reproduction control device but also an acoustic reproduction device for reproducing music data as in the present embodiment.
The mixer unit 41 is a unit for switching audio data output from the computer 2, adjusting the volume of each channel, and applying sound effects. The mixer unit 41 is a unit from the first channel adjustment unit 411 to the fourth channel adjustment unit 414, and the microphone adjustment unit 415. To prepare for.
An effect unit 41E is provided at the lower right of the mixer unit 41. The effect unit 41E, which will be described in detail later, has an effect selection switch 416, a channel selection switch 417, an effect amount adjustment switch 418, an effect addition switch 419, and a beat change switch 420, which will be described in detail later, in order to impart a musical sound effect to the reproduced music. Is provided.

The deck units 42L and 42R are parts that give various effects to the music data output from the computer 2 by being operated by the operator, and include a jog dial 421, a tempo slider 422, a performance pad 423, and a CUE button 424. It includes a play / pause button 425, a loop button 426, a deck select button 427, and a load button 428.

The jog dial 421 exemplified as a rotation controller is rotatably provided on the main body of the equipment of the deck portions 42L and 42R, and the operator operates the jog dial 421 to rotate the jog dial 421 to fast-forward or reverse the music data to be played. Playback can be performed.
At the center of the jog dial 421, a display unit 43 composed of a liquid crystal display device is provided. The display unit 43 displays the BPM (Beats Per Minute) value of the music data being played, the elapsed time, the progress status, the beat position, and the rotation state of the LP record according to the progress of the music data being played by 33 RPM. , The operator is made to visually recognize the reproduction progress of the music data.

The tempo slider 422 is a switch for adjusting the tempo of the music data to be played. The performance pad 423 is a button for switching the effect on the music data being played, and when the operator presses the pad, the effect of loop, cue, slicer, sampler, etc. is instantaneously applied to the music data being played. Can be granted.
The CUE button 424 is a button for cueing the music to be played.

The play / pause button 425 is a button for starting playback of the music data and pausing the music data being played. The loop button 426 is a button for performing loop reproduction of the music data being reproduced.
The deck select button 427 is a button for selecting which channel of the first channel adjusting unit 411 to the fourth channel adjusting unit 414 of the mixer unit 41 operates the music data being played. In the present embodiment, the left deck unit 42L switches between the first channel adjustment unit 411 and the third channel adjustment unit 413, and the right deck unit 42R switches between the second channel adjustment unit 412 and the fourth channel adjustment unit 414. Can be switched to.

The load button 428 is a button for loading music data from the computer 2, and when the music data to be played on the computer 2 is selected and then the load button 428 is pressed, the music data is transferred from the first channel adjustment unit 411 to the first. It is loaded into any channel of the 4-channel adjusting unit 414.

[2] Detailed configuration of the effect unit 41E The DJ controller 4 can add an effect to the musical tone signal constituting the music data. Specifically, as shown in FIG. 2, the mixer unit 41 By operating the effect unit 41E provided at the lower right of the music data, an effect can be added to the musical tone signal of the music data.
The effect selection switch 416 is a switch for selecting an effect to be applied to a musical tone signal, and examples of the effect include echo, delay, reverb, flanger, phaser, pitch, noise, and the like, and the musical tone effect imparting device 5 described later. However, it can be selected by operating the effect selection switch 416.

The channel selection switch 417 is a switch for selecting a channel to which an effect is applied, and can apply an effect to the first channel adjustment unit 411 to the fourth channel adjustment unit 414 and the microphone adjustment unit 415 of the effect unit 41E. There is.
The effect amount adjustment switch 418 is a switch that adjusts the degree to which a musical tone effect is applied to the original song of the music data, and the magnitude of the effect can be set by adjusting the volume.
The effect addition switch 419 is a switch that applies an effect synchronized with the beat position of the musical tone signal or the BPM, and applies the effect selected by the effect selection switch 416 to the channel selected by the channel selection switch.
The beat change switch 420 is a switch that gives an effect synchronized with the beat position of the music signal or BPM. When the arrow button in the right direction is operated, the beat magnification is increased, and when the arrow button in the left direction is operated, the beat magnification is increased. The beat magnification becomes smaller.

[3] Configuration of Musical Tone Effect Applying Device 5 FIG. 3 shows a musical tone effect imparting device 5 according to an embodiment of the present invention. The musical sound effect imparting device 5 is an effector that generates and outputs a sawtooth wave, a triangular wave, a sine wave, a square wave, or the like that sounds like the pitch continuously rises or falls in accordance with the beat of the music data SD being played. Is.
The musical tone effect imparting device 5 includes an LFO (Low Frequency Oscillator) 51, four oscillators 521-524 connected in parallel to each other, a fader 53, and an adder, which constitute an LFO (Low Frequency Oscillator) 51 that constitutes a musical tone effect imparting program executed on the CPU of the DJ controller 4. It includes 54 and a level adjusting unit 55.

The LFO 51 transmits a periodic signal composed of low frequency waves to the respective oscillators 521-524 and the fader 53, respectively. Specifically, the LFO 51 reads beat position information from the input music data SD, and outputs a periodic signal synchronized with the cycle of n beats or 1 / n beats (n is an integer) of the musical tone signal, respectively. Call 524 and fader 53. That is, the LFO 51 functions as the periodic signal generation unit of the present invention.

Further, the LFO 51 transmits to each oscillator 521-524 by including a pitch shift signal having different pitches to start transmitting from each other in the periodic signal. Specifically, when the LFO 51 transmits a pitch shift signal of a certain pitch to the first-stage oscillator 521, the LFO 51 starts transmission to the second-stage oscillator 522 by the first-stage oscillator 521. A pitch shift signal that is two octaves higher than the pitch is transmitted, and a pitch shift signal that is four octaves higher than the pitch that is started by the first stage oscillator 521 is transmitted to the third stage oscillator 523. Then, the fourth-stage oscillator 524 transmits a pitch shift signal that is six octaves higher than the pitch that is started by the first-stage oscillator 521. That is, the LFO 51 functions as the pitch shift unit of the present invention.

The oscillator 521-524 exemplified as the acoustic signal generation unit generates an effect sound which is an acoustic signal that continuously shifts the pitch in octave units in synchronization with the periodic signal transmitted from the LFO 51. Specifically, in the present embodiment, the oscillator 521-524 can generate an effect sound for 7 octaves from 55 Hz to 7040 Hz. The oscillator 521-524 outputs an effect sound that shifts in the ascending direction from the start sound, returns to the lower limit of the octave when the upper limit of the octave is exceeded, and outputs an effect sound that continuously raises the pitch again.

The fader 53 fades out the effect sound when the pitch of the acoustic signal generated by the oscillator 521-524 becomes the first pitch, and fades in the effect sound when the pitch becomes the second pitch. Specifically, the fader 53 fades in the effect sound at the lower limit of 1 octave (55Hz-110Hz) that can be transmitted by the oscillator 521-524, and fades out the effect sound at the upper limit of 1 octave (3520Hz-7040Hz). This makes it possible to generate an effect sound of an infinite scale.

The plurality of adders 54 are portions for superimposing the effect sounds generated by the respective oscillators 521-524. The acoustic signal superimposed by the adder 54 is output to the level adjusting unit 55.
The level adjustment unit 55 is a part in which the effect sound generated by the musical tone effect imparting device 5 is superimposed on the volume of the original song at an arbitrary ratio by the user's operation, and the effect amount adjustment switch of the above-mentioned switch group is used. It can be adjusted by operating 418. Specifically, as shown in FIG. 4, the volume of the effect sound is adjusted while maintaining the volume of the original sound at 100%. In the present embodiment, the effect sound can be adjusted from −∞ to −3.67 dB via −16.5 dB.
The effect sound adjusted by the level adjustment unit 55 is output from the mixer unit 41 together with the original sound.

[4] Actions and Effects of the Embodiment In the above-mentioned musical sound effect imparting device 5, when the LFO 51 transmits a periodic signal of one cycle in one beat, as shown in FIG. 5, the oscillator 521 of the first stage is subjected to. A pitch shift signal starting from the lowest pitch of 55 Hz is transmitted, and the pitch shift signal of the second stage is two octaves higher than the pitch shift signal transmitted to the oscillator 521 of the first stage. To send. Further, the pitch shift signal of 4 octaves higher than the pitch shift signal transmitted to the oscillator of the first stage is transmitted to the oscillator 523 of the third stage, and the pitch shift signal of the first stage is transmitted to the oscillator 524 of the third stage. A pitch shift signal 6 octaves higher is transmitted with respect to the pitch shift signal transmitted to the oscillator of.

The effect sound output from each oscillator 521-524 fades in at the lowest octave (55Hz to 110Hz) and fades out at the highest octave (3520Hz to 7040Hz).
By generating such an effect sound, the musical sound effect imparting device 5 can output an infinite scale effect sound by an ascending sound in accordance with the tempo of the music data SD being played.
Therefore, by using the musical tone effect imparting device 5, it is possible to impart an infinite scale effect according to the reproduction tempo of the music data SD without performing complicated processing.

Since the effect sound generated by the oscillator 521-524 of the musical sound effect imparting device 5 is an acoustic signal composed of sawtooth waves, the listener can feel the effect sound rising infinitely. In addition, a triangular wave, a sine wave, or a rectangular wave can be used instead of the sawtooth wave.
When the pitch of the acoustic signal output by the oscillator 521-524 becomes 55 Hz, which is the first pitch, the musical sound effect imparting device 5 fades in the effect sound by one octave near the lower limit, and the second When the pitch reaches 3520 Hz, it fades out in one octave near the upper limit. Therefore, the effect sound when the oscillator 521-524 switches from a high pitch to a low pitch can be made difficult for the listener to notice, so that the infinite scale can be more easily perceived by the listener.

Since the pitch shift signal transmitted from the LFO 51 is a pitch shift signal that shifts the pitch in octave units, the effect sound output from each oscillator 521-524 is always shifted in octave units. Therefore, even if the effect sounds output from the respective oscillators 521-524 are added by the adder 54, they do not become dissonant sounds, so that the listener can feel a comfortable effect sound.

[5] Modifications of the Embodiment The present invention is not limited to the above-described embodiments, but also includes the modifications as shown below.
In the above-described embodiment, the musical tone effect imparting device 5 includes four oscillators 521-524, but the present invention is not limited to this. The musical sound effect imparting device may include a plurality of oscillators, and may include two or more oscillators.

In the above embodiment, the oscillator 521-524 is configured to output 7 octaves of effect sound, but the present invention is not limited to this. As an acoustic signal generation unit, an oscillator that outputs an effect sound exceeding 7 octaves may be adopted.
In the above-described embodiment, the musical tone effect imparting device 5 outputs an infinite scale effect sound composed of rising sounds, but the present invention is not limited to this. It may be configured to output an effect sound of an infinite scale consisting of a descending sound. In this case, it is possible to output an infinite scale composed of descending sounds by a sawtooth wave descending to the right, contrary to the sawtooth wave shown in FIG.

In the above-described embodiment, the LFO 51 serving as the pitch shift unit transmits the pitch shift signal transmitted to the oscillators 521-524 as a pitch shift signal that shifts in octave units, but the present invention is limited to this. I can't. For example, a pitch shift signal shifted three times as a pitch may be output to the oscillator.
In addition, the specific structure, shape, and the like at the time of carrying out the present invention may be other structures and the like.

1 ... Music data playback control system, 2 ... Computer, 3 ... USB cable, 4 ... DJ controller, 5 ... Music sound effect adding device, 41 ... Mixer section, 41E ... Effect section, 42L ... Deck section, 42R ... Deck section, 43 ... Display unit, 51 ... LFO, 53 ... Fader, 54 ... Adder, 55 ... Level adjustment unit, 411 ... 1st channel adjustment unit, 412 ... 2nd channel adjustment unit, 413 ... 3rd channel adjustment unit, 414 ... 4 channel adjustment unit, 415 ... microphone adjustment unit, 416 ... effect selection switch, 417 ... channel selection switch, 418 ... effect amount adjustment switch, 419 ... effect addition switch, 420 ... beat change switch, 421 ... jog dial, 422 ... tempo slider 423 ... Performance pad, 424 ... CUE button, 425 ... Play / pause button, 426 ... Loop button, 427 ... Deck select button, 428 ... Load button, 521 ... Oscillator, 522 ... Oscillator, 523 ... Oscillator, 524 ... Oscillator, SD ... Music data.

Claims (7)

A periodic signal generator that generates a periodic signal that synchronizes with the period of n beats or 1 / n beats (n is an integer) of the musical tone signal of the music data.
In synchronization with the periodic signal, an acoustic signal that shifts the pitch from the start sound in the ascending direction , returns the pitch to the lower limit when the pitch exceeds the upper limit, and shifts the pitch in the ascending direction again. With multiple sound signal generators
Equipped with
The start sound is different from each other in each of the plurality of acoustic signal generators.
A musical sound effect imparting device , wherein the upper limit and the lower limit are common to the plurality of acoustic signal generation units. In the musical sound effect imparting device according to claim 1,
It is characterized by having a fader that fades out the acoustic signal generated by each acoustic signal generation unit in the first pitch range on the upper limit side and fades in in the second pitch range on the lower limit side . A device that gives a musical sound effect. A periodic signal generator that generates a periodic signal that synchronizes with the period of n beats or 1 / n beats (n is an integer) of the musical tone signal of the music data.
Synchronized with the periodic signal, the pitch is shifted in the downward direction from the start sound, and when the pitch falls below the lower limit, the pitch is returned to the upper limit and the pitch is shifted in the downward direction again. With multiple sound signal generators
Equipped with
The start sound is different from each other in each of the plurality of acoustic signal generators.
A musical sound effect imparting device, wherein the lower limit and the upper limit are common to the plurality of acoustic signal generation units. In the musical sound effect imparting device according to claim 3,
It is characterized by having a fader that fades out the acoustic signal generated by each acoustic signal generation unit in the first pitch range on the lower limit side and fades in in the second pitch range on the upper limit side. A device that gives a musical sound effect. The musical tone effect imparting device according to any one of claims 1 to 4 .
Each acoustic signal generator is a musical sound effect imparting device characterized in that a sawtooth wave is generated as an acoustic signal. In the musical tone effect imparting device according to any one of claims 1 to 5 .
A device for imparting a musical sound effect , wherein the start sound is different in octave units in each of the plurality of acoustic signal generation units. A musical tone effect imparting program, characterized in that a computer functions as a musical tone effect imparting device according to any one of claims 1 to 6 .

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