SoundConverter is an application for batch converting sound files between formats. Just set the options and drag in files or folders to convert. The OSX version is free for files under 500K and $14 for a license. The Windows version is free for many popular formats and has a 14 day free trial. Tags are supported for ape, flac, ogg, mpc, mpeg, mp2, mp3, tta, and wv files.