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On my old Windows computer the digital output was for the optical audio output.
edit: and from google it appears it can also be for a coaxial cable too.
Yes, the digital output was needed for the optical drive unless you had a special sound cable connecting your optical drive to your sound adapter. But computer manufacturers stopped adding those cables, and this is why Windows would default to digital output.
but i still have to ask - can you see a flashing red light in either of the jack plugs?
(I don’t expect there will be for a device that is only $19.99)
iec958-stereo-output: Digital Output (S/PDIF) (priority 0, latency offset 0 usec, available: unknown)
is completely illogical in this context
please post some information from ALSA to look a bit deeper down this rabbit-hole
amixer --card=2
if i can make sense of the data in there I would suggest trying to increase basic audio settings
current settings are ok - sample spec: s16le 2ch 44100Hz- but that is just CD quality
This device should be able to work at DVD quality (24bits 48000Hz) no problem
nothing unexpected in ALSA controls, Looks like a standard USB device
so the mis-identification as Digital IEC958 is only in Pulseaudio. and If Pulseaudio is working ok with ALSA, it is not a major problem
Creative claims it can do 24-bit 96kHz
It can probably do the same in Linux, but I think it is more than most people need, and may not work well on a low-end system
Human range of hearing only goes up to 20kHz at the most. most people cannot hear any audible difference above 48kHz (but it may upset local bats!)
Pushing twice as much data through a system is likely to add some CPU load, and that may be a problem if system is not very powerful. 24bits and 48000Hz is good for most modern systems
The default pulseaudio configuration file for this situation is /etc/pulse/daemon.conf
making a custom configuration file in the home folder allows easier changes to audio settings
default settings are still there as a backup if it does not work out
Open a text editor to make the file
nano ~/.config/pulse/daemon.conf
(any text editor can be used, but nano is usually available on any version of Manjaro)