I'm using alsa 1.0.28 (lib and utils). Everything works fine so far, i.e.
stereo output through speakers and headphone as well as S/PDIF and all possible capturing.
According to my mainboard manual, the codec supports 5.1 (analog)
surround by using the rear "line out" jack (for rear surround) and "mic" jack (for center and sub) - which doesn't work. (I don't have even a clue what to do to activate.)
My questions:
- Does 5.1 analog surround work for the ALC662? If yes, how?
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/plain/Documenta...
Channel Mode This is an enum control to change the surround-channel setup, appears only when the surround channels are available. It gives the number of channels to be used, "2ch", "4ch", "6ch", and "8ch". According to the configuration, this also controls the jack-retasking of multi-I/O jacks.
- If not, is it a limitation of the kernel oder alsa?
HDA-Intel.conf says:
HDA-Intel.pcm.surround51.0 cards.HDA-Intel.pcm.front.0
Does this mean that 5.1 surround is restricted to stereo in any case?
This mean softvol plugin is also used by 5.1 and stereo
Do "pcm playback volume" affect the volume after you change channel mode from 2ch to 6 ch so that mic and line in jacks are retasked as output ?