Editing Soundtrack Pro (section)

===Audio editing mode===
[[File:Soundtrack Pro Waveform Edit.png|thumb|300px|right|The audio editing mode, with actions list.]]
The audio-editing mode is where individual clips can be edited. The [[waveform]], as well as a [[frequency spectrum]], can be viewed for the clip. The audio can be analyzed for common audio problems such as clicks and pops, power line hum and clipped signals, and then any discovered problems can be fixed. Audio can be faded in and out, the amplitude can be altered for a selection, noise can be removed and silence, waveforms and ambient noise can be inserted. There is also a selection history tool that cycles between previous selections. After zooming in on the individual samples in the audio waveform, the pen tool can be used to edit the wave directly. There is a time-stretch tool for changing the speed of a clip, or a part thereof.

Sound editing in the application is based on actions. The actions performed on a clip, such as reversing it, inverting it or [[Audio normalization|normalizing]] it, are listed on the left-hand side, where they can be reviewed, disabled, reverted or re-ordered. Unchecking the check box for one action removes its effect (and the waveform changes animatedly to reflect the change). Moving the purple tag upwards cycles back through the actions history.

The program also features [[AppleScript]] automation and batch processing, for which it also provides actions for [[Mac OS X v10.4]]'s [[Automator (software)|Automator]] application.