SNDRV_MIXER_IN_MONO 158 sound/isa/gus/gusmax.c SNDRV_MIXER_IN_MONO, 0, SNDRV_MIXER_IN_MONO 162 sound/isa/gus/gusmax.c SNDRV_MIXER_IN_MONO, 0, SNDRV_MIXER_ETYPE_INPUT,