Soundtrack Pro Update (version 1.0.2) gives audio and video professionals a powerful way to edit and design sound.
Soundtrack Pro waveform editor includes innovative action layering and intelligent repair and restoration functions that let you accurately manipulate audio while retaining total creative flexibility. And, with support for video formats up to HD resolutions, full multitrack editing and mixing, over 50 professional effects plug-ins, and thousands of included Apple Loops, precise audio control has never been so intuitive
* Provides improved reliability and performance.
Update download at theApple website.