Using PT2399 reverberation chip, with NE5532 op amp, it can mix human voice and music, which can realize independent adjustment of music volume, microphone volume and reverberation time to achieve K song effect
It can be used for DC 12-24V power supply or AC 5-12V, which can be directly used for various digital power amplifier boards. If the power supply voltage is the same, the power supply can be shared