I have a s/pdif digital output off of my motherboard. I have all of my apps setup to use the s/pdif output. When I play a dvd with powerdvd it sends the correct 5.1 surround to my receiver, but when I try to play the same dvd through Nero Showtime 220.127.116.11 the video plays good, but I don't get any sound. If I switch showtime off of s/pdif it will play sound, just not on spdif that I need. I would use powerdvd but I have a few mp4s I encoded to 5.1 in nero recode and power dvd won't play the 5.1 (or any sound, just video) on the mp4s. I need to either have powerdvd play the mp4 audio, or have nero showtime play audio through the s/pdif.