AK4531_MIC_GAIN 336 sound/pci/ak4531_codec.c AK4531_SINGLE("Mic Boost (+30dB)", 0, AK4531_MIC_GAIN, 0, 1, 0) AK4531_MIC_GAIN 481 sound/pci/ak4531_codec.c ak4531->regs[AK4531_MIC_GAIN] & 1 ? "+30dB" : "+0dB");