SB_ALS4000_MONO_IO_CTRL
oval = snd_sbmixer_read(sb, SB_ALS4000_MONO_IO_CTRL);
oval = snd_sbmixer_read(sb, SB_ALS4000_MONO_IO_CTRL);
snd_sbmixer_write(sb, SB_ALS4000_MONO_IO_CTRL, nval);
SB_SINGLE("Master Mono Playback Switch", SB_ALS4000_MONO_IO_CTRL, 5, 1),
SB_ALS4000_MONO_IO_CTRL,