How to choose transcode audio targets (Audio transcoding to Opus rather than AC3)

[josephine]

This appears to be the same issue reported in the beta:

8.24.0.28158 - Transcode to AC3 broken (optical)

Transcode for multichannel audio (EAC3, TrueHD etc) are transcoded to 2 ch Opus instead of 5.1 AC3 when using optical. In settings pass through is set to optical. AC3 set as supported, DTS set to not supported. AC3 movies AC3 is passed through. All other audio (multichannel) are converted to opus. Plex server say it transcode to opus. I have no problem when reverting to 8.23.1.28030. Then everything is transcoded to AC3 or passed through as AC3. Plex server say it transcodes to AC3. Later …

Apparently Plex developers don’t know that optical only supports 2 channel PCM. One employee told me that Opus is better, supports 5.1 and will be converted to PCM 5.1 and sent to my receiver.