Maybe somebody else with more experience will know more than I on this, but try going to either "option", "language", or "setup" on the actual master and commander title menu. There you might be able to change the output from dolby digital to dts.

2 = M60,4 = QS8's,1 = VP150,1 = EP350,1 = EP500
HK247
Optoma HD70,110" DIY screen
Xbox360 & PS3