IC chip.
RCD510 internal audio signal thrust is slightly smaller, it is best to add a front stage, can obtain better results, but silent control is difficult, start and shut down may have current impact sound. Because the mute function of RCD510 is realized through the functional instructions of the power amplifier IC chip, that is, the MCU sends the mute instruction to the AMP IC, and the AMP IC will disconnect the audio signal and ground it. The automatic mute action generally occurs during the switching of the machine and the changing of the song. In order to realize the mute function of the external power amplifier, the control signal of the power amplifier IC must be intercepted by MCU and then muted by the peripheral circuit.