[kami@Index ~]$ speaker-test -D iec958:CARD=PCH,DEV=1

speaker-test 1.1.0

Playback device is iec958:CARD=PCH,DEV=1
Stream parameters are 48000Hz, S16_LE, 1 channels
Using 16 octaves of pink noise
ALSA lib confmisc.c:1286:(snd_func_refer) Unable to find definition 'cards.HDA-Intel.pcm.iec958.1:CARD=PCH,AES0=4,AES1=130,AES2=0,AES3=2'
ALSA lib conf.c:4292:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4771:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM iec958:CARD=PCH,DEV=1
Playback open error: -2,No such file or directory
[kami@Index ~]$ speaker-test -D iec958:CARD=PCH,DEV=0

speaker-test 1.1.0

Playback device is iec958:CARD=PCH,DEV=0
Stream parameters are 48000Hz, S16_LE, 1 channels
Using 16 octaves of pink noise
Channels count (1) not available for playbacks: Invalid argument
Setting of hwparams failed: Invalid argument