Apple Logic Pro 9 - Manual (Page 609)

Using Strip Silence to Create Segments for Drum Loops
Dividing drum loops into small segments is a good way of perfectly synchronizing them.
For example, in audio passages where the bass drum and snare are completely separate,
you can often use Strip Silence to isolate each individual beat.
Using Strip Silence to Optimize Synchronization
Different computers, different synchronization sources (internal or SMPTE code), different
tape machines and—in theory—different samplers or hard disk recording systems will
exhibit slight variations in clock speed. Changing just one component can lead to a loss
of synchronization between recorded audio material and MIDI. This is particularly
applicable to long audio regions.
This is another situation where the Strip Silence function can help, by creating several
shorter audio regions, with more trigger points between the audio and MIDI events.
For example, you can use this method to roughly split up a whole audio file, and then
divide the new regions, using different parameters. The new regions can then be processed
again with the Strip Silence function—and so on.
Using Strip Silence to Optimize Files and Regions
You can use Strip Silence to automatically create regions from an audio file that contains
silent passages, such as a single vocal take that runs the length of a project. The unused
regions or portions of the audio file can be deleted, saving hard disk space, and simplifying
(file and) region management.
Using Strip Silence to Extract Audio Files from a Disc
Many sample library discs (CD or DVD) contain thousands of audio recordings stored as
AIFF or WAV files. Strip Silence can be used to split these into individual regions, which
can be used directly in the Arrange area. Regions can also be converted into individual
audio files (samples), which can be used in the EXS24 mkII.
609 Chapter 19 Removing Silent Passages from Audio Regions