Jag använder iTunes, sen installera bara detta scriptt:
http://dougscripts.com/262
"Drag and drop audio files to this droplet to have iTunes convert them with an encoder selected on the fly (AAC, Lossless, MP3, AIFF, or WAV), restoring iTunes' Preferences-set encoder afterwards. Converted files are saved to a user-selected location. The converted files/tracks are removed from iTunes -- it will be as though iTunes "never saw them"."