AK4524_ADC_GAIN0
sc->shadow[dev][AK4524_ADC_GAIN0] = 0x7f;
val = envy_codec_read(sc, idx / 2, (idx % 2) + AK4524_ADC_GAIN0);
envy_codec_write(sc, idx / 2, (idx % 2) + AK4524_ADC_GAIN0, val);