I’ve recently started using a free audio converter program called Audio Switch and it’s really great. I’ve used it in a pinch to quickly convert sound files from MP3 to AIFF, from WAV to MP3 and even extracted audio out of MP4 movies. This has been useful not only for just getting scratch audio out of a movie file, but also I’ve used it for putting video presentation audio onto my ipod. And it’s fast and free!
It works on the most common file formats and more including wav, mp3, wma, mp2, m4a, ogg, avi, mid, flac, mov, amr, aac, mpga, dct, au, aif/aiff, raw, dvf, vox, cda, gsm, dss, sri, shn, dss, msv, wmv.
I’m using the Mac Intel version and even though we have our own proprietary conversion software custom made for us, sometimes you just need a quick little something done and that’s where Switch works brilliant.