Anyone have or know where I can find pink noise, white noise, etc.. in MP3 format?

Is it safe to use MP3-encoded white or pink noise as a reference? I'd be concerned that the compression would eliminate some of the frequency content as inaudible, when really you want it all there regardless so that you can calibrate to it. It seems better to stick with uncompressed files instead.

Michael Grant
12GB Green
080000266