JPH08103000A - Vocal assist device - Google Patents

Abstract

PURPOSE: To provide a vocal assist device in which a vocal is intermitted or no unnatural sound is produced when a model vocal is switched into the vocal of the user. CONSTITUTION: An accompaniment signal received from a terminal L is subtracted from an accompaniment signal and a model vocal signal received from a terminal R at a subtractor 2 and the model, vocal signal is fed to an attenuator 3. The vocal signal being a result of a song of the user toward a microphone is received from a MIC terminal and added to the accompaniment signal from the terminal L at an adder 4 and the model vocal signal attenuated by the attenuator 3 is added by an output of a detector 1 simultaneously. Thus, the vocal signal of the user and the model vocal signal are mixed properly and switched smoothly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vocal assist device used in a karaoke device or the like.

[0002]

2. Description of the Related Art In recent years, karaoke devices have become popular and have come to be used by many people, and there have been proposed vocal assist devices and vocal change devices for assisting the singing of people who are not accustomed to music.

An example of the conventional vocal assist (also referred to as vocal change) apparatus described above will be described below with reference to the drawings. FIG. 6 shows a block diagram of a conventional vocal assist device. It is assumed that the recording medium is, for example, a compact disc on which an accompaniment is recorded on the L channel and an accompaniment + model vocal is recorded on the R channel. Of course, the recording medium may be a tape or a video disc as long as they have the same recording form.

In FIG. 6, a terminal L to which an L-channel accompaniment signal is input is connected to a (-) input of a subtractor 2 and one input of an adder 4, and an R-channel accompaniment signal and a model vocal. The terminal R to which the mixed signal is input is connected to the (+) input of the subtractor 2. The output of the subtractor 2 is the terminal 8a of the changeover switch 8.
, And is input to the terminal 8b of the changeover switch 8 and the detector 1 from the microphone input terminal MIC. The movable terminal 8c of the changeover switch is connected to the other input of the adder 4. The output of the adder 4 is connected to the speaker 7 via the power amplifier 6. Detector 1
The characteristic of (1) has a characteristic of outputting a high level when a signal of a certain level or more is input.

With the above arrangement, the operation will be described. When the subtracter 2 subtracts the L-channel accompaniment signal from the mixed signal of the R-channel accompaniment signal and the model vocal signal. The accompaniment signal disappears and only the vocal signal remains and is applied to the terminal 8a of the switch 8. When the movable terminal 8c of the switch 8 is in the state shown in the figure, this vocal signal is added to the accompaniment signal of the L channel input from the terminal L by the adder 4, amplified by the power amplifier 6, and then amplified by the speaker 7.

When the microphone input sung by the user into the microphone is input from the MIC terminal,
The detector 1 detects it, the output becomes high level, and the movable terminal 8c of the changeover switch 8 is changed from the terminal 8a to the terminal 8a.
By switching to b, the vocal signal of the model of the subtractor 2 is cut, and the vocal signal and the accompaniment signal sung by the user toward the microphone are added by the adder 4, amplified, and then amplified by the speaker 7. . Therefore, for example, when a voice multiplex disc in which two voices are alternately input as a model vocal signal such as a duet song is used, if one of the vocal parts of the voice is sung into a microphone, You can change part of the vocal to your own voice and enjoy another model vocal and duet.

[0007]

However, the above-described conventional vocal change device has a problem that the detector 1 time delays when the user's utterance is interrupted in the middle of a song that is not good at it or a song to be sung for the first time. In addition, the switch 8 does not immediately switch to the modeled vocal, and the vocal is interrupted, or the user's vocal suddenly switches to the modeled vocal, resulting in a strange sound. It was This will be described with reference to the signal waveform diagrams of the respective parts of the circuit in FIG.

FIG. 7 is a signal waveform diagram showing signal waveforms at various portions of the circuit of FIG. In the figure, MIC is the waveform of the input signal of the MIC terminal, (a) is the output of the detector 1, and (e)
Is a signal output from the changeover switch 8. Detector 1
The output of becomes high level as soon as the MIC input is input, but remains at the high level for a time Δt even if there is no input. This is because if there is no time delay, the changeover switch 8 is switched due to a slight breathing during singing, which causes an unnatural state, and therefore a time delay is created using an integrating circuit or the like. Therefore, the output (e) of the changeover switch 8 has no MIC input in the Δt portion,
The sound is interrupted without the model vocal signal being input.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a vocal assist device which is easy to sing without any discomfort even when the song is not good or the song is sung for the first time.

[0010]

To achieve the above object, the present invention has, as a first configuration, only an accompaniment sound signal from a first input signal in which an accompaniment sound signal and a model vocal signal are mixed. Of the second input signal, a detector that detects the input of the microphone signal that is the third input signal and outputs an input detection signal, and a detector of the subtractor that detects the input detection signal of the detector. An attenuator for attenuating the output, and an adder for adding the second input signal, the third input signal and the output of the attenuator are provided.

As a second configuration, a subtractor for subtracting the second input signal containing only the accompaniment sound signal from the first input signal in which the accompaniment sound signal and the vocal signal of the model are mixed, and the third A detector that detects an input of a microphone signal that is an input signal and outputs an integrated value of the input signal, an attenuator that attenuates the output of the subtractor according to the integrated value of the detector, and the second input. And an adder for adding a signal, the third input signal and the output of the attenuator.

As a third configuration, a subtracter for subtracting the second input signal containing only the accompaniment sound signal from the first input signal in which the accompaniment sound signal and the vocal signal of the model are mixed,
Detector for detecting an input of a microphone signal which is an input signal of the input signal and outputting an integrated value of the input signal, and a second detector for detecting an output of the subtractor and outputting an integrated value of the output signal A comparator for comparing the output ratios of the first and second detectors, an attenuator for attenuating the output of the subtractor according to the comparison value of the comparator, the second input signal and the An adder for adding the third input signal and the output of the attenuating means is provided.

[0013]

According to the present invention, in the above-mentioned first configuration, the subtractor subtracts the second input signal containing only the accompaniment sound signal from the first input signal in which the accompaniment sound signal and the model vocal signal are mixed. When the detector detects the input of the microphone signal which is the third input signal and outputs the input detection signal, the attenuator attenuates the vocal signal output from the subtractor, Since the attenuated vocal output, the accompaniment signal, and the microphone input signal are added by the adder, the vocal sound of the model acts so as to be small when the microphone is input.

In the second configuration, similarly, when the subtractor outputs a model vocal signal and the detector detects the input of the microphone signal and outputs the integrated value of the input signal, the attenuator detects the input signal. Since the modeled vocal output of the subtractor is attenuated according to the integrated value of the output of the subtractor, the modeled vocal output acts so as to decrease when the microphone input is large.

Further, in the third configuration, as the output of the first detector for detecting the integrated value of the microphone input is larger than the output of the second detector for detecting the integrated value of the model vocal signal, the comparator becomes It acts to increase the degree of attenuation of the attenuator and reduce the vocal signal of the model.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the vocal assist device of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a vocal assist device of the first embodiment. In the figure, portions having the same functions as those of the conventional example shown in FIG.

The output of the subtractor 2 is input to the attenuator 3 as an attenuator. A resistor R1 is connected to the input terminal of the attenuator 3, the other end is connected to the variable resistor R2, the other end of the variable resistor R2 is connected to the emitter of the transistor Tr, and the collector is grounded. And resistor R
The connection point between 1 and the variable resistor R2 is connected to the adder 4. On the other hand, the input from the microphone input terminal MIC is connected to the detector 1 and the adder 4, and the output of the detector 1 is connected to the base of the transistor Tr of the attenuator 3.

The operation of the vocal assist device of the first embodiment of the present invention constructed as above will be described below. When the subtracter 2 subtracts the L-channel accompaniment signal that is the second input signal from the mixed signal of the R-channel accompaniment signal that is the first input signal and the vocal signal that is the model, the accompaniment signal disappears. Only the model vocal signal remains. When there is no microphone input which is the third input signal, there is no output from the detector 1 so that the transistor Tr
Is non-conducting and the modeled vocal signal output of the subtractor 2 is added to the accompaniment signal of the L channel input by the adder 4 without being attenuated through the resistor R1 and amplified by the power amplifier 6. The speaker 7 is driven to make the sound loud.

Then, as soon as the microphone input is detected by the detector 1, the input detection signal a is output at a high level, whereby the transistor Tr of the attenuator 3 becomes conductive and the resistor R1 and the variable resistor R2 are connected. The model vocal signal T attenuated by the division ratio, the accompaniment signal of the L channel input, and the microphone input signal are added by the adder 4, amplified, and then amplified by the speaker 7. FIG. 2 shows signal waveforms at various parts of the circuit of FIG. When the microphone input is input and cut off while there is a vocal signal of the model, the attenuator 3 includes the time delay Δt for the loss of the input signal of the output (a) of the detector 1 as shown in (b). The vocal signal of the book is attenuated, but if the resistance value of the variable resistor R2 is not zero, the vocal signal of the model remains small but remains. Therefore, as in the conventional example, the time delay Δt portion of the detector. Since the model vocal signal does not become zero, the vocal sound is not interrupted by the user's vocal from the MIC input, and the vocal sound is not interrupted.

As described above, in the present embodiment, the vocal signal of the model can be left even when the vocal input by the user is input, so that the vocal is not interrupted even if the song is unfamiliar and no discomfort occurs. Since the level of the vocal signal of the model can be varied by the user adjusting the variable resistor R2, the value of the variable resistor R2 is first increased to make the vocal of the model larger, and if it improves, the resistance is increased. By lowering the value or setting it to zero, the vocal can be completely switched to your own voice from the microphone as in the conventional example. In this embodiment, the attenuator 3 may be replaced with an electronic volume controller that operates with the detector 1.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a block diagram of the vocal assist device of the second embodiment. Hereinafter, those having the same functions as those already described are designated by the same reference numerals and the description thereof will be omitted. Detector 1 from the microphone input terminal MIC
It is connected to A and the adder 4. The detector 1A obtains an analog output by using an integrating circuit instead of the digital characteristics shown in FIGS. Instead of the attenuator 3 shown in FIG. 1, the electronic volume 3A, which is an attenuator connected so that the output decreases as the output voltage of the detector 1A increases, is configured to control a vocal signal as a model. .

In the above structure, the operation will be described with reference to FIG. 4 showing the operation of each part of the circuit. The L-channel accompaniment signal and the vocal signal of the user's microphone from the MIC terminal are always mixed. A loud voice is output from the speaker 7. The level of the output (c) of the detector 1A fluctuates in accordance with the microphone signal input, so that the model vocal signal output which is the output of the electronic volume 3A fluctuates as shown in FIG. That is, when the MIC input is large, the vocal output of the model of the electronic volume 3A is small, and when the MIC input is small, the vocal output of the model of the electronic volume 3A is large, and the volume of both vocals is always balanced. Therefore, there is no sudden volume change, and no discomfort occurs. It is possible to change the residual level of the vocal signal as a model by setting an electronic volume or adding a variable resistor.

Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a block diagram thereof. The first detector 1A and the second detector 1B connected to the MIC input terminal and the subtractor 2 have the same characteristics as the detector 1A of the second embodiment shown in FIG. Detector 1
The comparator 5 connected to A and 1B has a characteristic of comparing two inputs and suppressing the output of the electronic volume 3A according to the ratio of the detectors 1A / 1B.

The operation of this circuit will be described below. When the user is not singing, the output of the electronic volume 3A is maximum and the vocal model is not attenuated but is amplified by the speaker 7 together with the accompaniment sound. Then, when the user sings into the microphone, the output of the detector 1A is added to the comparator 5, so that the output of the electronic volume 3A is attenuated and the vocal sound of the user is louder than the vocal sound of the model. It will be.

In both the second and third embodiments, the level of the model vocal sound can be varied by adding a variable resistor between the electronic potentiometer and the ground as in the first embodiment. Needless to say. If the combination of inputs at the L and R terminals is reversed, the connection may be changed accordingly.

[0026]

As described above, according to the vocal assist device of the present invention, in addition to the accompaniment sound signal and the vocal sound signal directed to the microphone of the user, the sound is attenuated by the attenuation means controlled by the microphone signal input. Since it was configured to mix and sound the modeled vocal signals, it is possible to leave the modeled vocal sound at an appropriate volume even when there is a microphone input. Even if the user's vocalization is interrupted, the vocal sound is interrupted, and the sense of incongruity caused by the sudden change from the user's vocal to the model vocal is eliminated, and karaoke can be enjoyed easily.

[Brief description of drawings]

FIG. 1 is a block diagram of a vocal assist device according to a first embodiment of the present invention.

[Fig. 2] Similarly, a signal waveform diagram of each part thereof

FIG. 3 is a block diagram of the vocal assist device according to the second embodiment.

FIG. 4 is a signal waveform diagram of each part of the same.

FIG. 5 is a block diagram of the vocal assist device according to the third embodiment.

FIG. 6 is a block diagram of a conventional vocal assist device.

FIG. 7 is a signal waveform diagram of each part of the same.

[Explanation of symbols]

 1, 1A, 1B Detector 2 Subtractor 3 Attenuator 3A Electronic Volume 4 Adder 5 Comparator

Claims (3)

[Claims] 1. A subtractor for subtracting a second input signal containing only an accompaniment sound signal from a first input signal in which an accompaniment sound signal and a model vocal signal are mixed, and a microphone which is a third input signal. A detector that detects an input of a signal and outputs an input detection signal, an attenuator that attenuates the output of the subtractor by the input detection signal of the detector, the second input signal and the third input signal A vocal assist device comprising: an adder for adding the output of the attenuator. 2. A subtracter for subtracting a second input signal containing only an accompaniment sound signal from a first input signal in which an accompaniment sound signal and a model vocal signal are mixed, and a microphone which is a third input signal. A detector that detects a signal input and outputs an integrated value of the input signal, an attenuator that attenuates the output of the subtractor according to the integrated value of the detector, the second input signal and the third Vocal assist device including an adder for adding the input signal of 1. and the output of the attenuation means. 3. A subtractor for subtracting a second input signal containing only an accompaniment sound signal from a first input signal in which an accompaniment sound signal and a model vocal signal are mixed, and a microphone as a third input signal. A first detector that detects a signal input and outputs an integrated value of the input signal; a second detector that detects an output of the subtractor and outputs an integrated value of the output signal; A comparator for comparing the output ratio of the second detector; an attenuator for attenuating the output of the subtracter according to the comparison value of the comparator; the second input signal and the third input signal; A vocal assist device comprising: an adder that adds the output of the attenuator.