Ok, if I go into alsamixer and mute the spdif (iec958)
then crank up aplay (aplay -D spdif dtsfile.wav) it works,
but using vlc, xine or mplayer I get nothing...
Ok Mplayer seems to work randomly, however the file I tried with mplayer was a 1080p x264 video with dts sooo much jitter etc
Need to figure out how to get this to work 100% of the time, then wait for 1080p support I guess