Soundtrack Pro

Something I know too little about is audio editing. I know it to be difficult and repetitive but the Macworld review of Soundtrack Pro makes it sound like a cinch:

While specialized audio effects may not be for everyone, the need to fix recordings plagued with problems is universal, especially when working with sound for video. Soundtrack Pro includes a number of lifesavers for this task. Out of the box, it has nearly every tool you’ll need for fixing clicks and pops, hum from power lines, clipped signals, and other problems. The Analysis pane automatically checks files for these problems and then lets you fix them individually or en masse; it also has a tool for momentarily zooming the waveform view on the offending segment. Sample-accurate editing (editing at the level of individual samples) means that you can fix even the tiniest problem.

Soundtrack Pro’s best sound-cleanup tool is the Reduce Noise tool: it can easily and magically reduce hiss, with controls that help maintain the sound you want to keep. It works best if you first identify the noise, by selecting hiss or another noise in the waveform, and then use the Process: Set Noise Print command. This tool allowed me to salvage what I thought might be an unusable MiniDisc recording for a client; while third-party options can reduce noise for you, it’s great to have the Reduce Noise feature included and integrated. (By contrast, another sound-cleanup option in Soundtrack Pro, Denoiser, is basically useless unless you want an underwater-like effect; stick with the Reduce Noise option.)

--Macworld Reviews Soundtrack Pro

MORE: Post magazine compares STP to Pro Tools.
JUST ORDERED FROM AMAZON: Sound Design and Audio Postproduction for Digital Video. Look for reviews in the coming weeks.
UPDATE: The audio book reviews are in!