REVO51_PT2258S_MUTE
envy_codec_write(sc, 2, REVO51_PT2258S_MUTE, 0xc0); /* reset */
envy_codec_write(sc, 2, REVO51_PT2258S_MUTE, 0xf9); /* mute */
if (addr == REVO51_PT2258S_MUTE) {