Matt,
Thanks for the response. Two questions:
What's actually changed in the latest build with respect to AC3 and DTS?
Where can I fnd these filters and how do I install them?
For AC3, we put them in DirectShow catagory and try to play them in DirectShow. You need to have an AC3 parser filter (I already have in on my computer, not sure how I got it) and a decoder filter (FFDShow works).
For DTS, we treat them as WAVE, and directly send the stream down the pipe using our WAVE plugin.
_EDIT_ (Feb 3, 2006):
DTS files go to DirectShow too. Now we only handle WAV files using our WAVE plugin. If the WAV file contains dts, you definitely need outboard decoder.
If a *.dts file is actually a WAVE file, it should be handled by DirectShow WAV filter and like a *.WAV file you need outboard decoder.
Other *.dts files should be handled with decoder filters such as FFDShow, AC3Filter. These filters can be configured to either send data to your outboard decoder via SPDIF, or decode it and output to your speakers connected to your sound card.