To disable the mute circuit about inner_codec, please configure the pin of GPIO as follows: 1.demo board himm 0x200f0078 0x0 himm 0x201A0400 0xF himm 0x201A03FC 0xF 2.socket board himm 0x200f0078 0x0 himm 0x20140400 0xF himm 0x201403FC 0xF