[halfhorsepower]

I use a combo of SoundStudio, and iTunes, because some phones can use the .aac format and some can only use the older .mp3 format. SoundStudio is freeware, and it gives you like a visual reference of the audio, however it only does .aiff and .wav etc. To get it from .aiff to .mp3 or .aac you must use iTunes, then from there you simply bluetooth it or email it to the mobile device in question. Don't move the files around in the finder, except to the mobile device, or you'll funk up the iTunes library, you can however copy the files to a folder created on the desktop for easy access then delete the folder when done to save disk space. Many options, just depends on the comfort level with getting into the folder structure of the music library.