If you have a Divx/AC3 movie, do the following.
You need the following installed/registered:
Intervideo audio filter (iviaudio.ax)
MPEG Audio codec (mpgaudio.ax)
1. Open .AVI with GraphEdit.
2. Delete Default DirectSound Device
3. Insert Filter
(Audio renderer / Default WaveOut Device)
4. Connect to Intervideo Audio renderer
5. Save graph
Use DVD Genie to select SP/DIF audio out.
Open graph file from media player or just drag it over it. You can use others like
You can also change the .avi file to .grf in the MicroDVD .ini file, so it is possible
to play movies with subtitles.
I tried only Dolby Digital but i think it works with DTS too.