I'm running into a bit of a peculiar problem when I attempt to output either Dolby Surround or DTS (any flavor, DTS-HD Master Audio or DTS 5.1). I've been utilizing a 3rd party codec to allow bitstream output via HDMI passthrough of both AC3 and DTS (ffdshow Audio Processor). However, whenever I enable the DTS passthrough, the sound cuts out. If I'm in my receiver's (Yamaha RX-V565) OSD at the time, the signal will display all the correct data (number of channels, bitrate, etc...) but it will be pulsing rapidly. Meanwhile, the LED read-out on the device will pulse "DTS" at the same rate.
My inquiry is into whether anyone knows if the 4650 can even output DTS in bitstream form over HDMI Audio. If so, then it's obvious I have a simple configuration problem, and will continue to poke around until I solve it. However, the rapid-fire pulsing makes me believe that the card doesn't support it. Which then leads me to the question regarding the fact that all the data populates correctly.