CM_OPEN_SPDIF     400 sound/pci/cmipci.c #define CM_OPEN_SPDIF_PLAYBACK	(CM_CH_PLAY | CM_OPEN_DAC | CM_OPEN_SPDIF)
CM_OPEN_SPDIF     401 sound/pci/cmipci.c #define CM_OPEN_SPDIF_CAPTURE	(CM_CH_CAPT | CM_OPEN_ADC | CM_OPEN_SPDIF)