I have the Roku Ultra with optical port, so that explains it.
I have DTS off currently in the Roku settings (due to the DTS sync issue) which is forcing DTS to transcode to DD.... this is Plex doing the transcoding, not the Roku.
Daxproduck wrote:No. Doing that was causing Plex to convert to AAC 5.1 which the roku downmixes to stereo pcm.
RokuDale wrote:If you have a file you can upload to our problem media box account that shows this dts audio sync problem, please pm me and I'll send an invite.