Macintosh Music and Audio Editors

3ivx D4: MPEG 4 Compressor
Allows Mac users to compress audio and video into cross-platform formats. Find news, updates and an online store.
Audiocorder
Stereo recording software supports Mac OS 9 and OS X. Download an evaluation copy and check out specs.
fLOW
Soundscape generator for Mac OS X processes any source audio into a variety of ambient timbres.
Lexikon-Sonate: Algorithmic Music Generator
Creates complex musical compositions on the fly via algorithms developed by Karlheinz Essl in 1985.
SoundSoap Pro
Audio editing software scrubs out pops and scratches for vinyl archiving and analog transfer applications. Compatible with XP, Direct X, RTAS and VST.