Simple mixer control 'IEC958',0 Capabilities: enum Items: 'PCM Out' 'H/W In 0' 'H/W In 1' 'IEC958 In L' 'IEC958 In R' Item0: 'PCM Out' Simple mixer control 'IEC958 Output',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [on] Simple mixer control 'IEC958',1 Capabilities: enum Items: 'PCM Out' 'H/W In 0' 'H/W In 1' 'IEC958 In L' 'IEC958 In R' Item0: 'PCM Out'