JP7028896B2 - 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 an acoustic musical tone effect to a musical tone signal, a flanger using delay time modulation, a phaser using phase quantity modulation, and the like are known.
For example, Patent Document 1 imparts a musical tone effect capable of shifting the phase of a musical tone signal having a pitch based on input music data while performing a signal delay uncorrelated with the pitch of the musical tone signal. The technology relating to the device is disclosed.

Japanese Unexamined Patent Publication No. 2000-205565

However, in the technique described in Patent Document 1, since the signal is delayed without correlation with the musical tone signal and the phase is shifted, it is difficult to impart the musical tone effect in synchronization with the music being reproduced.
Therefore, if a musical sound effect with a tempo, delay, or phase shift is applied during music playback, the listener may feel uncomfortable, and there is a problem that it is not suitable for DJ performances that emphasize tempo in particular. be.

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 a musical tone effect synchronized with the tempo of music data without causing a sense of discomfort to the listener.

The musical tone effect imparting device of the present invention is generated by 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 tone signal of the music data, and the periodic signal generation unit. A plurality of loop circuits provided with delay means for delaying the musical tone signal of the music data so as to be synchronized with the periodic signal, and the phase of the signal circulating in the loop circuit with respect to the delay means of each loop circuit. It is characterized in that each loop circuit is provided with a shift phase unit that shifts to a different phase.

The musical tone effect imparting program of the present invention is characterized in that the computer functions as the above-mentioned musical tone effect imparting device.

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 said embodiment. The graph which shows the volume adjustment of the original sound, the effect sound, and the feedback sound by the level adjustment part in the said embodiment. The schematic diagram for demonstrating the operation in 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, key shift, 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 obtains a flange effect by changing a short delay time and mixing it with the original sound. The musical tone effect imparting device 5 comprises a filter processing unit 51, an LFO (Low Frequency Oscillator) 52, four loop circuits LP1 to LP4, and an adder 55, which constitute a musical tone effect imparting program executed on the CPU of the DJ controller 4. It includes 56, 57, 59 and a level adjusting unit 58.

The filter processing unit 51 separates the music data SD input at a separation frequency of 70 Hz into a high frequency component and a low frequency component. The high frequency components of the music data SD are input to the loop circuits LP1 to LP4, and delay processing is performed in the respective loop circuits LP1 to LP4. The low frequency component of the music data SD is directly output to the adder 56 without delay processing.

The LFO 52 transmits a periodic signal composed of low frequency waves to the loop circuits LP1 to LP4. Specifically, the LFO 52 reads the beat position information from the music data SD and transmits a periodic signal synchronized with the period of n beats or 1 / n beats (n is an integer) of the musical tone signal to the loop circuits LP1 to LP4. .. That is, the LFO 52 functions as the periodic signal generation unit of the present invention.

Further, the LFO 52 shifts the phase of the signal circulating in each of the loop circuits LP1 to LP4 to a different phase in each of the loop circuits LP1 to LP4 with respect to the loop circuits LP1 to LP4. In the present embodiment, a periodic signal with a phase difference of 0 ° is transmitted to the loop circuit LP1, a periodic signal with a phase difference of 180 ° is transmitted to the loop circuit LP2, and a position is transmitted to the loop circuit LP3. A periodic signal with a phase difference of 90 ° is transmitted, and a periodic signal with a phase difference of 270 ° is transmitted to the loop circuit LP4. That is, the LFO 52 also functions as the shift phase portion of the present invention.

The loop circuits LP1 to LP4 have a similar circuit configuration and include a delay device 53, a feedback circuit 53A, and a fader 54, and the output of the delay device 53 is fed back to the input of the delay device 53 via the feedback circuit 53A. Will be done.
The delay device 53 as the delay means is an effector that delays the musical sound signal of the music data SD, and the delay time by the delay device 53 in the present embodiment is 0.1 ms to 2 ms.
The fader 54 is an effector that fades in and fades out the signal output from the delay device 53. In the present embodiment, the effect sound is faded in and faded out at around 10% of the minimum and maximum delay time. I do.
When a periodic signal is input from the LFO 52, each delay device 53 performs delay processing of the musical tone signal of the music data SD so as to be synchronized with the periodic signal. Further, each fader 54 performs a fade-in process at the first portion of the delayed-processed signal and a fade-out process at the last portion so as to synchronize with the periodic signal.

The signal processed by the HPF (High Pass Filter) in the filter processing unit 51 is separated into two systems, an L channel and an R channel. The musical tone signal on the L channel side is input to the loop circuit LP1 and the loop circuit LP2, and delay processing is performed. The musical tone signal on the R channel side is input to the loop circuit LP3 and the loop circuit LP4, and delay processing is performed.

The outputs of the loop circuit LP1 and the loop circuit LP2 on the L channel side are added by the adder 55. Similarly, the outputs of the loop circuit LP3 and the loop circuit LP4 on the R channel side are added by the adder 55. The signals of the adder 55 and the adder 56 are input to the adder 57 in two systems (stereo). At this time, a signal LPF (Low Pass Filter) processed by the filter processing unit is input to the adder 57 and added to the output of the adder 57. The output of the adder 57 is input to the level adjusting unit 58.

The level adjustment unit 58 adjusts the volume of the original sound, the effect sound, and the feedback sound according to the operation position of the effect amount adjustment switch 418 described above. In the present embodiment, as shown in FIG. 4, the volume of the original sound and the effect sound are made the same at the 50% position of the effect amount adjustment switch 418, and thereafter, the effect amount is adjusted to increase the volume of the feedback sound.
The original sound and effect sound adjusted by the level adjusting unit 58 are added by the adder 59 and output from the mixer unit 41.

[4] Actions and Effects of the Embodiment When the LFO 52 gives a periodic signal of one cycle in one beat in the above-mentioned musical tone effect imparting device 5, the LFO 52 transmits a periodic signal with a phase difference of 0 ° to the loop circuit LP1. , A periodic signal with a phase difference of 180 ° is transmitted to the loop circuit LP2, a periodic signal with a phase difference of 90 ° is transmitted to the loop circuit LP3, and a periodic signal with a phase difference of 270 ° is transmitted to the loop circuit LP4. As shown in FIG. 5, when the musical tone signal of the original song has a sawtooth waveform with one cycle per beat, the delay time is shifted by 1/4 beat in the delay devices 53 of the respective loop circuits LP1 to LP4. The effect sound is output.
In the present embodiment, when the input musical sound signal has a saw blade-shaped waveform shown in FIG. 5, the effect sound such that the pitch of the sound keeps rising is synchronized with the tempo of the music data SD. It will be output. Therefore, it is possible to add an effect sound to the music data being played without giving the listener a sense of discomfort.

The signal of the L side channel in the music data SD is processed by the loop circuit LP1 and the loop circuit LP2, and the signal of the R side channel is processed by the loop circuit LP3 and the loop circuit LP4. By giving a phase difference to the loop circuits LP1 to LP4, the LFO 52 can alternately hear the effect sound of the musical tone effect imparting device 5 from the left and right channels, so that the effect can be expanded.

Since the LFO 52 changes the phase in one quarter of one cycle of the signal circulating in the loop circuits LP1 to LP4, it is possible to give a musical sound effect by synchronizing the loop circuits LP1 to LP4.
Since the filter processing unit 51 performs HPF processing on the signals circulating the loop circuits LP1 to LP4, noise is not generated in the circulating signals, and it is possible to prevent the low frequency signal from gradually increasing. , Stable effect sound can be output.

[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 loop circuits LP1 to LP4, but the present invention is not limited to this. The musical tone effect imparting device may include a plurality of loop circuits, and may include more than four loop circuits. In this case, the shift amount of the phase difference given to each loop circuit is set to 1 / integer of the number of loop circuits (integer), so that synchronization between the loop circuits can be achieved.
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 as long as the object of the present invention can be achieved.

1 ... Music data playback control system, 2 ... Computer, 3 ... USB cable, 4 ... DJ controller, 5 ... Music sound effect adder, 41 ... Mixer section, 41E ... Effect section, 42L ... Deck section, 42R ... Deck section, 43 ... Display unit, 51 ... Filter processing unit, 52 ... LFO, 53 ... Delayer, 53A ... Feedback circuit, 54 ... Fader, 55 ... Adder, 56 ... Adder, 57 ... Adder, 58 ... Level adjustment unit, 59 ... adder, 411 ... 1st channel adjustment unit, 412 ... 2nd channel adjustment unit, 413 ... 3rd channel adjustment unit, 414 ... 4th 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, LP1 ... Loop circuit, LP2 ... Loop circuit, LP3 ... Loop circuit, LP4 ... Loop circuit, SD ... Music data.

Claims (5)

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.
A plurality of loop circuits provided with a delay means for delaying the musical tone signal of the music data so as to be synchronized with the periodic signal generated by the periodic signal generation unit.
A shift phase section that shifts the phase of the signal circulating in the loop circuit to a different phase in each loop circuit for the delay means of each loop circuit.
A musical tone effect imparting device characterized by being equipped with. In the musical sound effect imparting device according to claim 1,
A musical tone effect imparting device, characterized in that the musical tone signal of the music data is composed of at least two systems of signals. In the musical sound effect imparting device according to claim 1 or 2.
The shift phase unit is a musical sound effect imparting device characterized in that the phase is changed by an integral fraction of one cycle of a signal circulating in the loop circuit. In the musical tone effect imparting device according to any one of claims 1 to 3.
A musical tone effect imparting device characterized by having a filter processing unit that performs HPF (High Pass Filter) processing on a signal circulating in each loop circuit. A musical tone effect imparting program, characterized in that the computer functions as the musical tone effect imparting device according to any one of claims 1 to 4.

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