On Sun, 15 Jun 2008, Kerry Hoath wrote: > resample a file at 22050hz to 44100: > sox file1.wav -r 44100 file2.wav When I resample, I always use the polyphase effect. I.E. sox file1.wav -r 44100 file2.wav polyphase Both my experience, and what I've read online show this to be a better way of doing it. It takes longer, but sounds better. HTH.