Apple Soundtrack Pro 2 - Manual (Page 193)

Chapter 6 Editing Audio Files 193
Compressed formats such as MP3 and AAC files are also supported, although these
must be internally decompressed to a linear PCM format.
Soundtrack Pro supports audio files with any sample rate between 8 kHz and 192 kHz
and any of the following bit depths: 8, 16, 24, 32, and 32-bit floating point. You can edit
up to 24 tracks in a single file. You can play back up to six channels in a single file in the
multitrack Timeline. Audio files can be a maximum of 4 hours in length.
Note: When you play the file, Soundtrack Pro plays at the nearest sample rate your
hardware can support.
Audio File Projects
Soundtrack Pro allows you to edit individual audio files (sometimes known as waveform
editing) using Soundtrack Pro audio file projects. However, unlike most waveform editing
applications, Soundtrack Pro allows you to edit your audio files nondestructively by
keeping track of the actions you have performed on your audio file.
You can remove, disable, or reorder past actions at any time or save actions as AppleScript
documents that you can use to batch process other audio files. Actions you can perform
include trimming audio, copying and pasting parts of the waveform, normalizing or
amplifying levels, applying effects, and applying noise, pop, and click reduction.
Editing Audio Files Directly in a Multitrack Project
Most audio applications focus on multitrack editing or waveform editing, but not both.
Furthermore, most waveform editing applications handle media destructively—making
permanent changes to your media files. Soundtrack Pro provides the best of both
worlds: nondestructive waveform editing while working in a multitrack project.