i have a diamond xtreme sound 7.1 card and a set of klipsch promedia 5.1 speakers. when i play a surround-sound file in vlc/quicktime, etc. everything works as intended. non-multichannel sound such as stereo music files and osx interface sounds do not play properly. i used to have a griffin firepro (with it's own software) that had an "all channel stereo" option where you could play stereo sound on all channels.. but the diamond does not have it's own software and i can't find anything in osx to do the equivalent. any ideas how i might achieve this? i'll end up using the headphone jack for now which is really disappointing since i lose three of my speakers doing that.