The very high power requirements of the Bluetooth audio module will affect the quality of the audio. It is
recommended to add an LC filter circuit, especially switching power supply (such as mobile phone
charger, etc.).
MUTE mute port: when this module is muted, this port outputs a high level of 3.3V and a low level of 0V
during playback. If the mute high level of the power amplifier board is effective, it can be directly
accessed. If the mute of the power amplifier board is low level control, you need to add a reverse circuit.
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