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4 Solving Audio Problems
Audio files are sometimes less than perfect. You can correct annoying clicks, hum, and
other file problems you find in your audio files with the Soundtrack Pro Analyze and
Repair feature.
In this chapter, you’ll learn about:
 Analyzing and Fixing Problems in an Audio File (p. 57)
 Creating an AppleScript Droplet to Analyze and Fix Audio Files (p. 60)
Analyzing and Fixing Problems in an Audio File
Soundtrack Pro can analyze and correct audio files for a variety of common audio issues:
 Clicks and pops: Sudden, short peaks in the waveform can make clicking and
popping sounds when played. You can increase the threshold parameter for
searching to find fewer clicks and pops.
 Power line hum: Power line hum (usually occurring at 50 to 60 Hz) can be found
and corrected.
 DC offset: DC offset, which is when the samples are not centered around zero, can be
found and corrected.
 Phase: Usually caused by a distorted or inaccurate stereo image, phase issues usually
show up as partial or complete cancelation of the left and right channels.
 Clipped signal: Signal overloading, resulting in cut-off audio, can be caused by poor
gain staging, surface damage to an analog recording, or other reasons.
 Silence: Silent sections of an audio clip can be found and corrected. You can define
the silence by threshold or duration.