PCSP_MIXER_CONTROL 123 sound/drivers/pcsp/pcsp_mixer.c PCSP_MIXER_CONTROL(enable, "Master Playback Switch"), PCSP_MIXER_CONTROL 124 sound/drivers/pcsp/pcsp_mixer.c PCSP_MIXER_CONTROL(treble, "BaseFRQ Playback Volume"), PCSP_MIXER_CONTROL 125 sound/drivers/pcsp/pcsp_mixer.c PCSP_MIXER_CONTROL(pcspkr, "PC Speaker Playback Switch"),