Thank you. I had the same issue as in this thread, with my thread here: The new PMP v3 preview tries to send EAC3 through optical connection?
and your suggestion of enabling WMP and installing the LAV filters from your link seems to have fixed things (this is on win 7). Can you please inform the Plex devs about this, as it seems to be a key to this problem?
Edit: EasyAudioEncoder still can’t be downloaded on PMP 3, but it can on PMP 2 and the LAV filters solves the other codec issues on PMP 2.