First time Using DTS on my system and there is no sound when selecting DTS on a DVD. Dolby Digital and music are working though, why? All three of these things MUST be present and configured for DTS playback: 1) Your receiver must be set to "Auto detect" or forced to DTS decoding. 2) In your DVD player's digital audio setup menu (NOT the menu on the DVD itself), you must ENABLE DTS. Dolby digital is on by default, and on 99.9% of players, DTS is NOT turned on from the factory. If there is an option for "bitstream" vs PCM, select bitstream. 3) Select the DTS track in the DVD's setup/language selection menu. NOTE: Not having your DVD player setup correctly when selecting a DTS track may cause a "static" white noise that could damage your speakers.