Well.. if its lossless compression there is no compression hehe(i know you can achive the same bitrate in movies with compression tho, dunno how it is with sound). But i know what you mean, converting to another format. Afaik audio CD got a bitrate on about 1411kbps. I dont know if even MP3 supports that high bitrate. Checked my version of RazorLAME (mp3 encoder) and i can only set it to 320kbps. I dont know about OGG and AAC etc. If its possible to have 1411kbps bitrate on those formats, wont they take just as much space as the .wav file, or almost as much?