We have a range of SD and HD movies encoded with the following audio channels:
AAC Dolby Pro Logic II downmix channel for use of stereo devices (SD / HD)
AC3 5.1 Dolby Digital for use with older AMPs (SD / HD)
- DTS HD for use with new amps (HD only) - I know DTS is not supported on Fire TV (if there for future updates)
Setup is HDMI cable to TV and Toslink to amp, a setup with we have used for many year successfully with our Media Centre PC which played 5.1 no issue via either Windows Media Centre, Kodi or Plex Home Theatre. However things have moved on and I decided to swap to a lower power Amazon Fire 4K box to replace aforementioned PC and here is where I am getting the problem. Note, we're on a wired GigLAN network which the PC used without issue.
Any time we play a movie in plex (SD or HD) and use the AC3 5.1 track we get audio skipping, it can be a minute of 2 between skips and then the lights on the amp show the signal is lost for a spit second, sound cuts out for a spit second before everything picks back and carries on and then repeats; the downmix AAC stereo plays fine and 5.1 plays fine from any of the Amazon Prime content!
I have tried every setting I can think of to sort this but nothing seems to have any effect; I have ensured all our films are direct play compatible where possible as the plex server is only running on a NAS.
Is this being looked at? Does someone know how to fix it? It's driving me nuts...
I don't really want to send the Fire TV back as I am a prime member so a solution would be great!
Side note - tried clearly the Cache files (didn't work) / Uninstalled the App several times and the audio skipping as soon as it's reinstalled!