MUTE_CHANNEL
MUTE_CHANNEL, MUTE_CHANNEL, 0);
error = cd_setchan(sc, MUTE_CHANNEL, MUTE_CHANNEL, MUTE_CHANNEL,
MUTE_CHANNEL, 0);
error = cd_setchan(sc, LEFT_CHANNEL, LEFT_CHANNEL, MUTE_CHANNEL,
MUTE_CHANNEL, 0);
MUTE_CHANNEL, MUTE_CHANNEL, 0);
error = cd_setchan(sc, BOTH_CHANNEL, BOTH_CHANNEL, MUTE_CHANNEL,
MUTE_CHANNEL, 0);