I've been doing a conversion from a DVD source, and I tried 'passthru' on the DTS audio track.
During playback I was not able to get some of the popular players to play the DTS track at all -- there was no sound. AC-3 passthru' played properly on these players.
I tried VLC Player, and Media Player Home Cinema.
I selected 'passthru' for the encoder in the Audio setting for the DTS track.
Anyone sees these issues also?