Listening to DTS on a stereo setup is a relatively shitty experience compared to Dolby Digital. For Dolby Digital you can have proper downmixing by either choosing RF or Line mode in the audio settings. DTS on the other hand is a different story. There is this DTS drcscale option you can set from 0-100% compression and it doesn't sound nearly as good as the options for Dolby Digital, because the dialogue volume is still pretty low compared to RF mode for Dolby Digital. DTS 5.1 audio is okay, barely satisfactory and DTS 7.1 is awfully balanced despite 100% compression. It drives me nuts when the best quality version of a movie contains DTS 5.1 or 7.1 audio. Is there really no good downmixing option for DTS? Maybe a player or something. I am using VLC right now on my Mi Box.
For the time being I just always add a second downmixed and normalized mp3 steam to most of my movies. Works great and you can always hear everything. Little time consuming though.