Analog karaoke accompaniment amplifier circuit diagram

This circuit can remove the singing voice from the stereo, leaving only the accompaniment music. The songs in the stereo signal are input with the same level signal from pin 2 (inverting input) and pin 3 (non-inverting input) of IC 1 ( LM386 ) , then the signals will cancel each other out in the LM386 , and there will be no output, while the accompaniment music In stereo mode, they are input through pins 2 and 3 respectively. Because the levels of the left and right channels are different, they will not cancel each other out. The voltage gain of this circuit is 40 to 46dB (equivalent to approximately 100 to 200 times). The microphone signal is amplified by IC2 and then added to the non-inverting input terminal of IC1. It is amplified by IC1 and the sound is emitted from the speaker at the same time as the accompaniment music.