I own a BDP7600 (SW version 1.35).
When I play a MKV file which contains a DTS track, it is not properly being decoded. It plays in plain stereo?!
I connected my speakerset (Edifier S550) directly to the 5.1 RCA output.
Decoding of DTS on Blu-Ray or DVD works perfectly. Also 5.1 (AC3) works perfectly with MKV files.

Can you help me out here?