I see iec958 with aplay -L
dcerouter_58762:/home/remi# aplay -L
default:CARD=Intel
HDA Intel, ALC883 Analog
Default Audio Device
front:CARD=Intel,DEV=0
HDA Intel, ALC883 Analog
Front speakers
surround40:CARD=Intel,DEV=0
HDA Intel, ALC883 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=Intel,DEV=0
HDA Intel, ALC883 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Intel,DEV=0
HDA Intel, ALC883 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Intel,DEV=0
HDA Intel, ALC883 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Intel,DEV=0
HDA Intel, ALC883 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Intel,DEV=0
HDA Intel
IEC958 (S/PDIF) Digital Audio Output
null
Discard all samples (playback) or generate zero samples (capture)
With AdminWebsite --> Advanced --> sotware versions
alsa-base = 1.0.14-1ubuntu2
alsa-utils = 1.0.14-1ubuntu4
With AdminWebsite --> Advanced --> Packages
275 ALSA Base
12 ALSA libraries
13 ALSA libraries development
590 ALSA Sound Drivers
589 ALSA Sound Drivers Source
293 ALSA utilities
Does it means ALSA Sound Drivers not installed ?