In Phonon I can get sound by testing the Right and Left speakers (see here: https://i.imgur.com/nSurr4d.jpg) so it does connect on one level, but when I pick the HDMI audio in the video players it won't give any sound (see here: https://i.imgur.com/h6Z8r4j.jpg).
I tried "mplayer -ao alsa:device=hw1.7" and "mplayer -ao alsa:device=hw0.7" and either way I get
My aplay output is here:[AO_ALSA] alsa-lib: pcm.c:2501:(snd_pcm_open_noupdate) Unknown PCM 1,7
[AO_ALSA] Playback open error: No such file or directory
Failed to initialize audio driver 'alsa:device=1.7'
Could not open/initialize audio device -> no sound.
What am I doing wrong here? Thanks!