AK4358_ATT
sc->shadow[0][AK4358_ATT(i)] = 0xff;
sc->shadow[0][AK4358_ATT(i)] = 0xff;
sc->shadow[0][AK4358_ATT(i)] = 0xff;
val = envy_codec_read(sc, 0, AK4358_ATT(idx)) & ~AK4358_ATT_EN;
envy_codec_write(sc, 0, AK4358_ATT(idx), val | AK4358_ATT_EN);