After contacting kdLinks support, it appears that the media player doesn't support flac/wav with 5.1 - only stereo. Has something to do with the codecs, I'd guess. The unit was designed to play uncompressed hi-def video files with hi-res audio. Anyone know of any, preferably free, software that will take a flac or wav with 5.1 and convert it to a simple .vob struct with blank video or something of the like? At this point, I'm less concerned with quality than I am with functionality. Hearing the SACD 5.1's in lossy surround instead of lossless, is at this point....better than not being able to play them at all.