All Blu-ray players must play all of the Dolby and DTS audio formats, when playing authored Blu-ray discs.
What it doesn't have to do is play DTS-HD, for example, if the audio is in a MKV wrapped file. Seems stupid, since the player is able to handle all of the audio formats.
So, no matter how you play the file, by only having the Dolby Digital core, or the DTS core, you can be certain that it will be playable by whatever device you are using.