JPH0624042Y2 - Tape playback device - Google Patents

Description

[Detailed Description of the Invention] (b) Industrial field of application The present invention relates to a reproduction signal obtained from an audio multiplex recording tape, a microphone signal obtained from a wired microphone, or an FM.
The present invention relates to a tape reproducing device that mixes a transmission microphone signal from a wireless microphone.

(B) Conventional technology A device that can sing a song along with music obtained from a music source such as a magnetic tape or a record (commonly known as a karaoke device)
It has been known. This device mixes a source signal obtained from a music source with a microphone signal obtained from a microphone and emits the sound from a speaker. Since it can easily sing a song without a live performance, it is widely used at present. There is. In the karaoke device, when a microphone signal is mixed with a source signal, a tape reproducing circuit for mixing and reproducing a microphone signal from a microphone by using a voice multiplex recording tape is disclosed in Japanese Utility Model Laid-Open No. 60-180121.
As described in 3F 3/181), the output of the detection circuit that detects the presence of the microphone signal obtained from the microphone mutes the playback signal of the channel on which the singing signal of the singer of the audio multiplex recording tape is recorded. It is known to do so.

Further, there is a tape reproducing circuit capable of microphone mixing as described above, in which a muting operation is arbitrarily released by operating a switch.
It is known from publication 806 (G11B 5/027).

(C) Problems to be solved by the invention According to the above-mentioned conventional technology, when mixing the reproduction signal of the audio multiplex recording tape and the microphone signal from the microphone, the microphone signal is detected if there is a microphone signal. You can muting the singing signal of the voice overdubbing tape and mix and play the microphone signal with the performance signal.
If there is no microphone signal, the tape reproduction signal (performance signal and singing signal) can be mixed and reproduced. Furthermore, the tape playback signal (playing signal and singing signal) is operated by switch operation.
It is also possible to mix and play the microphone signal with a normal signal.

The above-mentioned prior art only shows a microphone mixing operation using a wired microphone connected to a device by a plug jack. However, when actually using the karaoke apparatus, if the FM wireless microphone is used, the microphone mixing operation can be performed in a wide range in the room without being affected by the length of the microphone cord.

However, when the FM wireless microphone is used, it is often far away from the device. Therefore, as described above, the mixing reproduction operation as to whether or not the singing signal of the audio multiplex recording tape is muted depending on the presence or absence of the microphone signal. It is troublesome to operate the switch for selecting the normal mixing reproduction operation.

For this reason, although a switch is provided in the wired microphone in the above-mentioned prior art, it is unavoidable that the cord length is affected.

(D) Means for Solving the Problems In view of the above-mentioned problems, the present invention is configured to select and execute each mixing reproduction operation as described above by using an FM wireless microphone, and one channel The playing circuit of the audio multiplex recording tape in which the performance signal is recorded on the other side and the singing signal is recorded on the other channel is configured to mix the singing signal obtained from the microphone, and the presence of the microphone signal from the microphone is detected. In a tape reproducing circuit which operates a muting circuit which is detected by a detecting circuit and which is connected to the signal path of the other channel of the reproducing circuit, an FM tuner for receiving a stereo transmission microphone signal and a monaural transmission microphone signal from the FM wireless microphone is provided. What is connected to the microphone input circuit by the FM tuner The tape reproducing apparatus is provided with a control circuit that activates the detection circuit in response to reception of one of the transmission microphone signals.

(E) Function When the FM wireless microphone is used to mix and reproduce the transmission microphone signal and the reproduction signal of the audio multiplex recording tape, if the stereo transmission microphone signal is transmitted from the FM wireless microphone, this is received by the FM tuner. If the detection circuit that detects the presence or absence of the microphone signal is activated by the control circuit and the transmission microphone signal is input to the microphone input circuit, and the monaural transmission microphone signal is transmitted from the FM wireless microphone, this is received by the FM tuner. Then, the transmission microphone signal is input to the microphone input circuit, and at the same time, the control circuit operates so as to make the detection circuit inoperative.

(F) Embodiment An embodiment of the tape reproducing apparatus of the present invention shown in the drawings will be described below.

(1) is a first magnetic head for reproducing a performance signal recorded on one channel of the voice multiplex recording tape, and (2) is a second magnetic head for reproducing a singing signal recorded on the other channel of the recording tape. , (3) is a microphone jack into which a microphone plug to which a wired microphone is connected is inserted, (4) is a first preamplifier for amplifying the output signal of the first magnetic head (1), and (5) is the second A second preamplifier for amplifying the output signal of the magnetic head (2), (6) a microphone amplifier for amplifying a signal from the signal terminal (3 ') of the microphone jack (3), (7) a multiple audio volume, ( 8) is a microphone signal presence / absence detection circuit to which the microphone signal output from the microphone amplifier (6) is input, and the detection circuit (8) outputs a high level signal when there is a microphone signal. (9) is an NPN muting transistor whose collector is connected to the output side of the second preamplifier (5), whose emitter is grounded, and whose base is connected to the output side of the detection circuit (8);
0) is a tape volume for adjusting the signal level from the tape, and (11) is for mixing the tape reproduction signal from the volume (10) and the microphone signal from the microphone amplifier (6) and outputting from the speaker (12). Is the main amplifier of. (13)
Is an FM tuner for receiving a stereo transmission microphone signal and a monaural transmission microphone signal from the FM wireless microphone. The transmission microphone signal received by the FM tuner (13) is detected from the detection output terminal (d) of the microphone amplifier (6). It is input to the input circuit. The FM tuner (13) is a stereo indicator terminal of the multiplex circuit.
When the stereo transmission microphone signal is received, the stereo indicator terminal (P) changes from a high level to a low level when the stereo transmission microphone signal is received.

(14) is a first PNP type whose base is connected to the terminal (P) through a resistor (15) and a control voltage (+ B) is applied to the emitter.
The control transistor (16) has a collector / emitter connected to the power supply line of the detection circuit (8), a base grounded via a resistor (17), and a resistor (18) connected to the first control transistor (14). Second NPN type connected to collector
It is a control transistor. (19) is the FM tuner (13) when a microphone plug is inserted and connected to the microphone jack (3)
This is a switch that sets the terminal (P) of to low level.

Since the present invention is constructed as described above, if the reproducing operation of the audio multi-recording tape is now performed, the performance signal is output by the first magnetic head (1) and the second magnetic head (2) is output. Singing signals of the model singer are output, and these signals are mixed and reproduced from the speaker (12) through the audio multiplex volume (7) and the tape volume (10).

At this time, if the microphone plug is inserted and connected to the microphone jack (3) with the audio multiplex volume (7) set to the intermediate position, the switch (19) is turned on and the first control transistor (14) is turned on. The base potential is set to low level, and the transistor (14) becomes conductive. The control voltage (+ B) is changed to the second control transistor (16) by the conduction of the transistor (14).
Is applied to the base of the transistor, the transistor (16) becomes conductive, and the detection circuit (8) is supplied with power to activate the detection circuit (8).

However, if you sing using a microphone connected to a microphone plug, the microphone signal is
Amplified by (6) and input to the detection circuit (8), the detection circuit
The high level output of (8) turns on the muting transistor (9).

The singer's singing signal serving as a model, which is obtained at the output terminal of the second preamplifier (5) by the conduction of the muting transistor (9), is grounded through the collector / emitter of the muting transistor (9). Meanwhile, microphone amplifier
The microphone signal from (6) is input to the main amplifier (11) and mixed with the performance signal of the tape.

Therefore, the signal output from the speaker 12 does not include the singing signal of the model singer, but becomes a mixing signal of the performance signal and the singing signal of the user.

When the microphone signal from the microphone is cut off while singing,
Since the output of the detection circuit (8) becomes low level and the muting transistor (9) changes from conducting state to non-conducting state, the singer's singing signal obtained at the output terminal of the second preamplifier (5) is in the muting state. Solved, first preamp
The performance signal obtained at the output end of (4) is mixed and output from the speaker (12).

Next, separate the microphone plug from the microphone jack (3) and press F
A case of performing a microphone mixing operation using the M wireless microphone will be described.

The FM wireless microphone is provided with a switch for selecting whether the microphone signal is transmitted in stereo or monaural.

Therefore, if a stereo transmission microphone signal is transmitted from the FM wireless microphone, this transmission signal is received by the FM tuner (13), and the stereo indicator terminal (P) of the multiplex circuit of the FM tuner (13) is stereo. When it is detected, the high level changes to the low level.

Therefore, while the first control transistor (14) is conducting,
The control transistor (16) becomes conductive, and the detection circuit (8) is supplied with power to be in an operating state.

The microphone signal output from the detection output terminal (d) of the FM tuner (13) is amplified by the microphone amplifier (6) and
It is input in (11).

On the other hand, since the detection circuit (8) detects that there is a microphone signal received by the FM tuner (13), the high level output of the detection circuit (8) causes the muting transistor (9) to conduct, and thus the wired microphone is used. As in the case of the above, muting the singer signal of the model singer obtained at the output end of the second preamplifier (5), and performing the mixing playback operation of the microphone signal from the wireless microphone and the performance signal of the tape. Can be done.

Next, when a monaural transmission microphone signal is transmitted from the FM wireless microphone, the stereo indicator terminal (P) of the FM tuner (13) receiving this microphone signal is at a high level, so that the first control transistor ( 14)
Is non-conductive and the second control transistor (16) is also non-conductive, and the detection circuit (8) is in a non-operation state.

Therefore, even if there is a microphone signal from the FM wireless microphone, the muting transistor (9) is still in conduction, so the microphone signal from the wireless microphone amplified by the microphone amplifier (6) and the performance of the audio multiple recording tape are played. It is possible to perform a mixing reproduction operation with a signal and a singing signal of a singer serving as a model.

(G) Effect of the invention As described above, the invention is a singer's singing that serves as a model for the audio multiplex recording tape when a microphone signal is present when performing microphone mixing reproduction with the audio multiplex recording tape using the wired microphone. To add a similar microphone mixing playback operation function using a wireless microphone to a tape playback device configured to perform a muting signal and perform a playing playback operation of a playing signal and a microphone signal of the tape. The microphone signal detection circuit for muting the singing signal of the singer, which serves as a model for the audio multi-recording tape, and mixes the microphone singing signal of its own in place of this signal, that is, a so-called vocal change microphone signal detection circuit for wireless microphone. Depending on whether the microphone signal is transmitted in stereo or monaural. Since it can be automatically set to the operating state or the non-operating state, the above vocal change operation can be performed on the wireless microphone side far from the equipment, and a tape playback device that is extremely convenient for use is provided. It can be provided.

[Brief description of drawings]

The figure is a schematic circuit diagram of the tape reproducing apparatus of the present invention. (1) ... a first magnetic head for reproducing a performance signal of a voice multiplex recording tape, (2) ... a second magnetic head for reproducing a singing signal of the tape, (6) ... a microphone amplifier, (8) ... presence or absence of a microphone signal Detection circuit, (9) ... Transistor for muting, (13) ...
FM tuner, (14) (16) ... First and second control transistors.

Claims (1)

[Scope of utility model registration request] 1. A reproducing circuit of a voice multiplex recording tape in which a performance signal is recorded on one channel and a singing signal is recorded on the other channel, the singing signal obtained from a microphone is mixed, In a tape reproduction circuit that detects the presence of a microphone signal from a microphone by a detection circuit and operates a muting circuit connected to the signal path of the other channel of the reproduction circuit, a stereo transmission microphone signal and monaural transmission from an FM wireless microphone An FM tuner for receiving a microphone signal is connected to the microphone input circuit,
A tape reproducing circuit comprising a control circuit which activates the detection circuit in response to reception of either one of the transmission microphone signals by the tuner.