SOLVED: Transcoding Issue on Unraid with Nvidia card

[Grannus]

Thanks for the replies.  I figured it out for my particular setup which has peculiarities with the Sonos and lack of TV e-arc.  In the Nvidia Shield Settings, you need to go into advanced sound settings and then choose available formats.  Deselecting the True HD and DTS-X and DTS radio buttons forced Jellyfin to transcode the audio.  I think the above Nvidia bug is applicable only if you have the decode ability for DTS which I lack.