JPS61168171A - Recorded orchestral accompaniment device - Google Patents

Abstract

PURPOSE:To decrease the volume of sound relatively and reduce troubles to the environment and to expand and improve functions by providing a headphone amplifier, a changeover switch, and a resistance which limits the variable range of a main sound volume control and switching circuits properly. CONSTITUTION:Contacts D, D', and D'' of the changeover switch 16 are con nected to B, B', and B'' in addition to a way of using other than normal accom paniment. In this case, tape reproducing signals of heads 5 and 5' are applied to a tape mixing amplifier 8' through the contacts B and D, but a microphone signal from a microphone volume control 4 is not applied to a microphone tape mixing amplifier 10 because contacts A' and D' are broken, so the signal of a microphone is not listened to through a speaker. When headphones are plugged in a headphone jack 13-2 in this state, the tape playback sound and microphone reinforced sound whose mixing ratio is adjusted by the sound multi plex balance volume control 7 are listened to while mixed together. Further, the output of the microphone mixing amplifier 10 is applied to a main sound volume control 11 through the resistance 30 and contacts B'' and D'', so the sound reinforcement volume range of the speaker is limited.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a karaoke apparatus that mixes a reproduction signal of a reproduction medium such as a tape, record, or video disk with a microphone audio signal and amplifies the mixture for listening.

BACKGROUND OF THE INVENTION In recent years, karaoke machines have become quite popular and used not only for professional use but also for home use. Conventional karaoke equipment reproduces an accompaniment signal recorded on a tape or record, sings along with it into a microphone, and amplifies the mixed signal of both to be heard through a speaker.

An example of a conventional karaoke apparatus will be described below with reference to the drawings.

For the sake of simplicity, a karaoke device that uses a general tape as a sound source will be explained. Figure 3 shows an example of a circuit diagram of a conventional karaoke device. In the figure, 1 is a microphone jack, 2 is a microphone amplifier, 3 is an echo amplifier, 4 is a microphone volume, and 5 is an accompaniment signal signal 8. Playhead, 5'
is a singing voice signal playback head on a channel different from that for accompaniment, 6°6' is a preamplifier, 7 is an audio multiplex balance volume, 8 is a tape mixing amplifier, 9 is a tape volume, 10 is a microphone/tape mixing amplifier, 11
is the main volume, 12 is the power amplifier, 13-1 is the headphone jack, 14 is the speaker, 17, 17'
, 18, 18', 21. 25 is a resistance.

The operation of the karaoke apparatus configured as described above will be explained below.

First, a signal from a microphone connected to a microphone jack 1 is amplified by a microphone amplifier 2, an echo is added by an echo amplifier 3, and the signal is applied to a microphone/tape mixing amplifier 1o via a microphone volume 4. On the other hand, the tape playback signal played back by the accompaniment signal playback head 5 and the singing voice signal playback head 6' is amplified by a preamplifier 6.6'.
Resistors 17°17', 18.18' and audio multiplex balance volume 7 adjust the accompaniment sound and singing voice playback sound appropriately.
balance is taken and amplified by a tape mixing amplifier 8 as a so-called audio multiplex signal in karaoke, and the tape volume is set to 9. It is applied to the microphone/tape mixing amplifier 1o via a resistor 25. Then, together with the microphone signal, it passes through the main volume volume 11, is amplified by the power amplifier 12, and is heard from the speaker 14.

Problems to be Solved by the Invention However, with the above configuration, the sound is amplified from the speakers, so if you want to have a sufficient singing experience, the volume will be quite loud, which will cause noise problems in densely populated areas. I couldn't enjoy karaoke to the fullest. To solve this problem, there is a way to enjoy it alone using headphones, but even though the person in question is fine, the people around him/her can only hear the actual voice coming from the person's mouth, which creates a very unnatural sound.
At times, it seemed even comical to me, which caused me to hesitate to practice.

In view of the above-mentioned problems, the present invention provides a karaoke apparatus that does not give the above-mentioned unnatural feeling and is configured to easily solve the noise problem.

Means for Solving the Problems In order to solve the above problems, the karaoke apparatus of the present invention has the following features:
Under normal conditions, the audio signal from the microphone and the reproduction signal from the reproduction medium are mixed, amplified, and amplified by the speaker. The reproduced signal is mixed with the reproduced signal at an arbitrary ratio, amplified, and listened to through the headphones, the audio signal from the microphone is not heard from the speaker, and the signal sound from the reproduced medium is amplified at a volume within a more limited range than under normal conditions. It has the following configuration.

Function: With the above-described configuration, the present invention can be used in the same way as a conventional karaoke device, and when using headphones, the selector switch allows you to switch between the accompaniment sound from the playback medium and your own singing from the headphones. The amplified sound from the microphone is mixed and enjoyed as karaoke at any volume, and at the same time, only the sound from the reproduction medium can be heard from the speaker at a volume within a more limited range than the normal state. No one else hears just the singer's real voice, and the accompaniment of the song comes out of the speakers, making it feel like a TV or radio is playing, which also feels unnatural to the people around you. Well, without making it sound comical, the person's real voice is not as loud as the voice amplified through a microphone, so the sound played from the speakers needs to be made that loud to hide it. Since there is no noise, the overall sound level is relatively low, and there is little nuisance to the neighbors.

EXAMPLE Below, a karaoke apparatus using a magnetic tape according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a circuit diagram of a karaoke apparatus according to a first embodiment of the present invention. In this figure, descriptions of parts having the same functions as those in FIG. 3 described above will be omitted. 8′
13-2 is a tape mixing amplifier, 13-2 is a headphone jack, 15 is a headphone amplifier, 16 is a changeover switch, and 19 and 20°3o are resistors.

The operation of the karaoke apparatus constructed as described above will be explained below with reference to FIG.

First, the signal from the microphone connected to the microphone jack 1 is amplified by the microphone amplifier 2, an echo is added by the echo amplifier 3, the microphone volume is set to 4, and the selector switch is set to 1.
The signal is applied to the microphone/tape mixing amplifier 1o via contacts A/ and D/ of 6. On the other hand, an accompaniment signal reproducing head 5;
The tape playback signal played back by the singing voice signal playback head 5' is amplified by a preamplifier 6.6', and then connected to a resistor 17.17.
'.

16.187, the accompaniment sound and the audio playback sound are appropriately balanced by the audio multiplex balance volume 7, and are transmitted as a so-called audio multiplex signal in karaoke through the contacts A and D of the changeover switch 16 to the tape mixing amplifier 8'.
amplified by tape volume 9. It is applied to the microphone/tape mixing amplifier 10 via a resistor 25. Then, along with the microphone signal, it is amplified by the power amplifier 12 through contacts A" and D, the main volume volume 11, and is heard from the speaker 14. At this time, the tape playback sound is transmitted through the tape mixing amplifier 8, resistor 19, and the headphones. It is added to the amplifier 16, mixed with the microphone volume 4 and the microphone audio signal from the resistor 20, passes through the resistor 21, goes to the headphone jack 13-2, is added to the R terminal, and if headphones are connected here, it is the same as a speaker. You can enjoy karaoke.The above is the same usage as conventional karaoke, but next is the contact of the changeover switch 16.

Connect D/, D" to B, B/, B". Then, the tape playback signals from the heads 5 and 5' are transmitted from the audio multiplex balance volume 7 to the tape mixing amplifier 8' via contacts B and D.
However, since the microphone signal from the microphone volume 4 is connected to the contacts ' and D' and is not applied to the microphone/tape mixing amplifier 10, the microphone signal cannot be amplified and heard from the speaker. If you connect headphones to the headphone jack 13-2 in this state, you can listen to the tape playback sound mixed with the microphone amplification sound, the mixing ratio of which has been adjusted using the audio multiplex volume 7, as in 91. . Further, since the output of the microphone/tape mixing amplifier 10 is applied to the main volume volume 11 via the resistor 3o and the contacts B" and D", the volume change range of the amplified sound from the speaker is narrower than in a normal case. In this state, the desired effect is achieved. Contact of changeover switch 16.

If you connect D/, D" to C, C', C", no sound will come out from the speakers, but you can still hear it from the headphones as before. As described above, according to Motosanio's side, the headphone amplifier 15, the changeover switch 16, and the resistor 3o that limits the variable range of the main volume volume 11 are provided,
The desired effect can be achieved by appropriately switching the circuit.

Contacts A, A', B, and B' switch in conjunction with .

It has a headphone jack 13-3 with C and C/.

The operation of the karaoke apparatus configured as described above will be explained below. When headphones are not connected to the headphone jack 13-3, contacts A and C, A' and C' are closed, and the tape playback signal and microphone signal are mixed and applied to the microphone/tape mixing amplifier 10, and the The output passes through the main volume, is amplified by the power amplifier 12, and is heard from the speaker 14. This is similar to the conventional function shown in FIG. Next, when headphones are connected to the headphone jack 13-3, contacts A and C open, and the microphone signal from the microphone volume 4 is no longer applied to the microphone/tape mixing amplifier 1o, so it cannot be heard from the speakers, but the headphone amplifier 16 Since both the tape playback signal and the microphone signal are added to the headphone, it is possible to enjoy so-called karaoke using headphones.
' After the output of the tape microphone mixing amplifier is connected to the resistor 30. Since it is added to the main volume volume 11 via contacts B' and C', the range of volume to be amplified from the speaker is limited.

As described above, according to this embodiment, the headphone amplifier 16
The headphone jack 13-3 has a switch contact that switches in conjunction with the insertion of the headphone plug, and a resistor 3o that limits the variable range of the main volume 11 is provided, and the desired effect is achieved by appropriately switching the circuit. be able to.

In the above explanation, the case where both accompaniment sound and voice sound exist in the tape playback sound was explained, but it is also possible to use only accompaniment sound.

Also, a resistor 3 that limits the variable range of the main volume volume 11
If, for example, another resistor is inserted in addition to 0 on the ground side of the main volume volume 11, the volume will not become zero, and the speaker will always be able to emit a volume higher than the desired volume.

Although the karaoke apparatus using audio tapes has been described, the present invention can be implemented in the same manner even if records, video tapes, or video discs are used as playback media.

Effects of the Invention As described above, in the present invention, in a normal state, an audio signal from a microphone and a reproduction signal from a reproduction medium are mixed at an arbitrary ratio, amplified and amplified by a speaker, and when headphones are inserted. By operating the selector switch, the audio signal from the microphone and the playback signal from the playback medium are mixed and amplified at an arbitrary ratio and can be heard at an arbitrary volume through the headphones, and from the speaker. With the function of amplifying only the playback sound of the playback medium and amplifying the sound within a limited range of volume compared to normal conditions, you can enjoy it as karaoke with headphones, and only the real voice of the person singing can be heard by others. There is no accompaniment for the song and the pre-recorded singing voice also comes out of the speaker, so it seems unnatural to the people around you. Since there is no need to make the multiplexed sound from the speakers very loud, the overall sound is relatively low, and it is less likely to disturb the neighbors. It is possible and extremely effective.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a karaoke apparatus according to a first embodiment of the present invention, FIG. 2 is a circuit diagram of a karaoke apparatus according to a second embodiment, and FIG. 3 is a circuit diagram of a conventional karaoke apparatus. 1...Mic jack, 2...Mic amplifier, 5...Accompaniment signal playback head, 6'.
...Singing voice signal reproduction head, 6,6'...
・Preamplifier, 7...Audio multiplex balance volume, 8゜8'...Tape mixing amplifier,
1o...Microphone/tape mixing amplifier, 1
2...Power amplifier, 13-2.13-3...
...Headphone jack, 14...Speaker, 15...Headphone amplifier, 16...
...Selector switch, 14, X-30...Resistance.

Claims (2)

[Claims] (1) Under normal conditions, the microphone signal is mixed and amplified with the playback signal of the playback medium, and the sound is amplified from the speaker.When headphones are connected to the headphone terminal, the mixer is mixed as described above by operating the selector switch. You can freely adjust the volume of the signal from the headphones and listen to it, and only the reproduction signal sound of the reproduction medium, which does not include the microphone output signal, is amplified from the speaker at a volume range that is more limited than under normal conditions. A karaoke device characterized in that it is configured so that it can be played and listened to. (2) The karaoke apparatus according to claim 1, wherein the changeover switch is a switch that changes in conjunction with the connection of headphones.