Thanks for the tips. I am ripping sound tracks from movies using DVD Audio Extractor, which I think does a good job. On two other (cheaper) players the MP3 files ripped by the same program with the default settings played in sync just fine! I tried CBR and sample rate 4410 Hz for the NW-HD5 but it didn't help. The output formats offered by the ripping software are: OGG, MP3, WAV, Direct Stream Demux, CD image and cuesheet. I've only tried MP3, and transferred the files to the player directly (with FileManager) and through SonicStage, with and without ATRAC conversion. None of this solved the delay problem. What's going on here?