It does support wav. My problem is that it does not support lossless compression. I prefer FLAC because of the metafiles. Also, 500 GB is just enough to hold my current CD collection if it was in WAV. If I have to connect to a computer I might as well use the computer. I was hoping find something that works with more robustness than a computer based system, with all annoyances and frustrations involved with keeping computers running right. I love my SqueezeBox and Slimserver the 90% of the time it works right. The other 10% of the time I am ready throw it out the window.