JPH01311464A - Sound mutliplex recording medium reproducing device - Google Patents

Abstract

PURPOSE:To perform reproduction by performing the mixing of a play signal and a mike signal by prohibiting the reproducing output of a singing signal recorded on another channel of a sound multiplex recording medium corresponding to the presence/absence of the mike signal. CONSTITUTION:When singing is performed by connecting a microphone to a microphone input terminal 3, the mike signal is inputted to a rectifier smoothing circuit 13 via a mike amplifier 6 and a buffer amplifier 12. A control signal generated from the circuit 13 is inputted to the base of a muting transistor (TR) 14, then, the TR 14 is turned ON, therefore, the reproducing output of the singing signal of a singer that is a model obtained at the output terminal of a second pre-amplifier 5 is grounded via the TR 14, and transmission to a succeeding stage is prohibited. Meanwhile, the mike signal from the mike amplifier 6 is impressed on a point B via a volume 17, and is mixed with the playing signal, and is outputted from an output terminal 20 via a main volume 18 and a main amplifier 19.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a playback device particularly suitable for mixing a microphone signal obtained from a microphone with a signal obtained from an audio multiplex recording medium.

(b) Prior Art A playback device (commonly known as a karaoke device) is known that allows the player to sing along to music obtained from a music source such as a magnetic tape or record. This device mixes the source signal obtained from the music source with the microphone signal obtained from the microphone and emits the sound from the speaker.It is currently widely used because it allows you to sing easily even without live music. . In the karaoke apparatus, when mixing a microphone signal with a source signal, for example, the first
A mixing circuit as shown in the figure is used. This mixing circuit is described in Japanese Utility Model Application Publication No. 56-163316, and includes a first magnetic head (1) for reproducing a signal recorded on the first channel of a magnetic tape, and a second magnetic head (1) for reproducing a signal recorded on the first channel of the magnetic tape. the second to play the signal recorded on
a magnetic head (2), a microphone input terminal (3), a first preamplifier (4) that amplifies the output signal of the first magnetic head (1), and a second preamplifier (4) that amplifies the output signal of the second magnetic head (2). a preamplifier (5), a microphone amplifier (5) that amplifies the input signal from the microphone input terminal (3);
6), a first amplifying a mixed signal of the output signal of the first preamplifier (4) and the output signal of the microphone amplifier (6);
It is composed of a main amplifier (7) and a second main amplifier (8) that amplifies a mixed signal of the output signal of the second preamplifier (5) and the output signal of the microphone amplifier (6).

(c) Problems to be Solved by the Invention By the way, recording media for karaoke machines include stereo recording media in which a left stereo signal is recorded on one channel and a right stereo signal on the other channel, and There is an audio multiplex recording medium in which at least a performance signal is recorded on one channel, and a singing signal of a model singer is recorded on the other channel. These recording media are composed of magnetic tapes or records.

For example, if a stereo-recorded magnetic tape is used as a performance recording medium for the mixing circuit shown in FIG. 1, the first magnetic head (1) will reproduce the left stereo signal, and the second magnetic head (2) will reproduce the right stereo signal. is played. However,
The left stereo signal is mixed with a microphone signal obtained from a microphone amplifier (6), and the left stereo signal is mixed with a microphone signal obtained from a microphone amplifier (6).
As a result, a mixed signal of the left stereo signal (performance signal) and the microphone signal is output from the left output terminal (9).

Furthermore, the right stereo signal is mixed with the microphone signal obtained from the microphone amplifier (6) and amplified by the second main amplifier (8), so that the right stereo signal (performance signal) is output from the right output terminal (10). A signal mixed with the microphone signal is output. Therefore, by using the karaoke apparatus equipped with the microphone mixing circuit shown in FIG. 1, it is possible to enjoy singing with stereo performance in the background.

On the other hand, as described above, a two-channel audio multiplex recording medium in which at least the performance signal of the music source consisting of the performance signal and the singing signal is separated from the singing signal and pre-recorded on one channel, such as a magnetic recording medium on which audio multiplex recording is performed, is used. When the microphone signal is mixed in the microphone mixing circuit using a tape, a mixed signal of the performance signal reproduced by the first magnetic head (1) and the microphone signal obtained from the microphone amplifier (6) is output to the left output terminal. (9) and a combination signal of the singing signal reproduced by the second magnetic head (2) and the microphone signal is output from the right output terminal (10), so that the music on the audio multiplex recording tape is outputted from the right output terminal (10). The drawback was that the singing signal of the source interfered with the signal, making it difficult to hear.

A normal karaoke device is equipped with an audio multiplexing volume for relatively changing the playback output of one channel and the other channel, and when using the audio multiplex recording tape as a performance tape, the The above-mentioned drawbacks are improved by manually operating the audio multiplex volume to attenuate the singing signal obtained from the audio multiplex recording tape to obtain a playback output of only the performance signal of one channel. However, when using the audio multiplex recording tape for singing practice and comparing the singing of a model singer with one's own singing, manual operation of the audio multiplex volume is extremely troublesome and operationally difficult. It's very inconvenient.

There is also an audio multiplex recording medium exclusively for duets in which the voices of a male singer and a female singer are alternately recorded as a singing signal on the other channel side.

For example, with a magnetic tape in which audio is multiplex recorded in this way, a male user inputs his own singing voice into a microphone and sings with the male singer where the male singer's voice is being played, and sings with the male singer when the male singer's voice is being played. It is possible to enjoy a duet in a way that allows you to listen to the female singer's playback sound without having to listen to the female singer's playback sound.

However, in conventional microphone mixing circuits, the male singer's singing signal and the microphone signal from your own microphone are mixed together and played back, so you can take the place of the male singer and alternately listen to the female singer being recorded. I can't enjoy singing signals and duets.

Also, at this time, the audio multiplexing volume is lowered, for example, only when a male singer's singing signal is played back, the output of this singing signal is lowered, and during that time, the user sings.

If the output of the singing signal is increased again and the female singer's singing signal is played while singing, it is possible to perform a completely alternating duet, but it is difficult for the singer or another person operating the playback device to perform the operation. This is extremely inconvenient.

(d) Means for Solving the Problems In view of the above-mentioned problem, the present invention provides a method for separating at least the performance signal from the singing signal among the music sources consisting of the performance signal and the singing signal, and predistributing it to one channel. recorded 2
A playback device for a channel audio multiplex recording medium, comprising a playback signal circuit for the two channels, such that at least the performance signal of one channel is mixed with a microphone signal input from a microphone in a mixing circuit and then played back. and the singing signal of the other channel is configured such that reproduction output is prohibited in response to the detection of the presence of the microphone signal. It is.

(E) Function According to the playback device of the present invention, two-channel audio multiplex recording in which at least the performance signal of the music source consisting of the performance signal and the singing signal is separated from the singing signal and pre-recorded on one channel. If you want to enjoy karaoke by mixing microphone signals while playing the media, in response to the input of the microphone signal, the playback output of the singing signal of the audio multiplex recording medium is automatically prohibited, and the performance signal is and the microphone signal can be mixed and played back.

(F) Embodiments Hereinafter, embodiments of the reproducing apparatus of the present invention shown in the drawings will be described.

The embodiment shown in FIG. 2 is a two-channel audio multiplex recording medium in which at least the performance signal of a music source consisting of a performance signal and a singing signal is separated from the singing signal and pre-recorded on one channel. An example of a playback device that plays back a tape (21) is shown.

In this figure, the same parts as in FIG. 1 are denoted by the same reference numerals, and the explanation thereof will be omitted.

(11) is the audio multiplexing volume, (12) is the buffer amplifier connected to the output end of the microphone amplifier (6), (1
3) is a rectifying and smoothing circuit that rectifies and smoothes the output signal of the buffer amplifier (12); (14) has a collector connected to the output end of the second preamplifier (5) via a buffer resistor (15);
The emitter is connected to the ground, and the base is connected to the rectifying and smoothing circuit (13).
), (16) is the first volume that adjusts the level of the performance signal, (17) is the second volume that adjusts the level of the microphone signal, and (18) is the main amplifier. (19) This is the main volume that adjusts the level of the signal applied to. still,
The buffer amplifier (12) and the rectifying and smoothing circuit (13) operate as a detection circuit that detects the presence of a microphone signal, and the muting transistor (14) operates as a muting circuit that attenuates the singing signal obtained from the audio multiplex recording tape. Operate.

If the audio multiplex recording tape (21) is now being played back, the first magnetic head (1) will play back the performance signal, and the second magnetic head (2) will play back the singing signal of the model singer. At that time, if the microphone input terminal (3) is not used, no output signal is generated from the rectifier and smoothing circuit (13), and the muting transistor (14)
is off. Therefore, the performance signal and the singing signal are amplified by the first and second preamplifiers (4) and (5), respectively, and mixed at point A, and then the first volume (16) and the main volume (18) are amplified. The signal is applied to the main amplifier (19) via the output terminal (20), and a mixed signal of the performance signal and the singing signal is output from the output terminal (20).

Next, if you sing by connecting a microphone to the microphone input terminal (3), the microphone signal obtained from the microphone input terminal (3) will be transmitted to the microphone amplifier (6).
) and a rectifying and smoothing circuit (
13), and a control signal is generated at the output end of the rectifying and smoothing circuit (13). The control signal is applied to the base of the muting transistor (14), and the muting transistor (14) is turned on, so that the model singer's signal obtained at the output of the second preamplifier (5) is The reproduction output of the singing signal is grounded via the collector-emitter path of the muting transistor (14), and transmission to the subsequent stage is prohibited.

On the other hand, the microphone signal obtained at the output end of the microphone amplifier (6) is applied to point B via the second volume (17) and mixed with the performance signal at chain point B. The mixed signal of the microphone signal and the performance signal is applied to the main amplifier (19) via the main volume (18),
After being amplified by the main amplifier (19), the output terminal (20
) will be output. f;t, the signal output from the output terminal (2o) does not include the singing signal of the model singer, but only the performance signal and the microphone signal.

When the microphone input signal from the microphone input terminal (3) is cut off, the output signal of the rectifying and smoothing circuit (13) is no longer generated, and the muting transistor (14) is turned off. At that time, the performance signal obtained at the output terminal of the first preamplifier (4) and the model singer's singing signal obtained at the output terminal of the second preamplifier (5) are mixed again at point A, and the mixed signal is is output from the output terminal (20) via the first volume (16), main volume (18) and main amplifier (19).

Therefore, if the circuit shown in Figure 2 is used, the circuit can be automatically switched depending on the presence or absence of the microphone input signal from the microphone input terminal (3), and the output signal can be automatically selected, so it can be used as a model, especially when practicing singing. You can automatically listen to and compare the singing voice of a certain singer with your own singing voice.

During practice, if you sing in a way that matches the singing voice and tempo of the model singer, the singer's singing voice will not be generated, but if it is different, the singer's singing voice will be generated, so the singer's singing voice will be heard. You can judge your own singing progress according to the degree of occurrence.

Furthermore, if the circuit shown in Figure 2 is used, if a male singer sings when a duet audio multiplex recording medium is played back and the male singer's voice is played back, the male singer's voice will be muted and his own voice will be muted. When the user's voice is output and the user finishes singing, the microphone signal disappears, so the muting is canceled and the female singer's singing voice is played back, making it possible to automatically perform a duet with the female singer.

In the embodiment, a case will be explained in which the performance signal of the audio multiplex recording medium is generated at the output end of the first preamplifier (4), and the singing signal of the model singer is generated at the output end of the second preamplifier (5). However, in the opposite case, the collector of the muting transistor (14) is connected to the first preamplifier (4).
) should be connected to the output terminal of the

(G) According to the present invention as described in detail, the singer's singing signal recorded on the other channel of the audio multiplex recording medium is reproduced depending on the presence or absence of the microphone signal from the microphone. Although it is possible to automatically prohibit the output from being output, it is possible to prevent a mixed signal of the performance signal of the recording medium and the singing signal of the model singer, or a combination of the performance signal of the recording medium and the microphone signal. Mixed signals can be switched automatically.

Therefore, it is possible to improve the operability when practicing karaoke by playing the audio multiplex recording medium, and it is also possible to enjoy duet karaoke for the club using the audio multiplex recording medium for duets.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a microphone mixing circuit of a conventional reproduction device, and FIG. 2 is a configuration diagram of a microphone mixing circuit as an embodiment of the reproduction device of the present invention. (3)...Microphone input terminal, (4)(5)...
...Preamplifier, (6) ...Mic amplifier, (11)
... Audio multiplex volume, (13) ... Rectification and smoothing circuit as a detection circuit, (14) ... Muting transistor for inhibiting output, (16) (17) (18)
... Volume, (19) ... Main amplifier, (2
0)...Output terminal, (21)...Audio multiplex recording medium.

Claims (1)

[Claims] (1) A reproduction device for a two-channel audio multiplex recording medium in which at least a performance signal of a music source consisting of a performance signal and a singing signal is separated from a singing signal and pre-recorded on one channel, the reproduction device comprising: It has a reproduction signal circuit, and is configured such that at least the performance signal of one channel is mixed with a microphone signal input from a microphone and reproduced by the mixing circuit, and the singing signal of the other channel is reproduced by the presence of the microphone signal. 1. An audio multiplex recording medium playback device, characterized in that the playback output is prohibited in response to detection.