5.1 DigiRack Plug-Ins Guide - Digidesign Support Archives

Time Compression/
Expansion
The Time Compression/Expansion plug-in allows
you to adjust the duration of selected regions,
increasing or decreasing their length
without changing pitch.
Time Compression/Expansion plug-in
This is a particularly useful function in audio
post-production applications since it allows audio
to be adjusted to specific time lengths or
SMPTE durations for synchronization purposes.
Time Compression/Expansion always works in
non-destructive mode.
Normalizing a selection before using Time
Compressing/Expansion will often produce
better-sounding results.
Time Compression/Expansion
Parameters
In addition to the standard AudioSuite functions,
the Time Compression/Expansion plug-in
provides the following parameters:
Source and Destination The Source fields display
the length of the current selection before processing
in each of the listed formats. All of the
fields in both columns are constantly active,
and a change made to one value is immediately
reflected in the values displayed in all the others.
The Destination fields both display and control
what the length of the selection will be after
processing using the current settings. You can
enter the length of the Destination file by double-clicking
the appropriate field in the Destination
column.
The controls below the bar line allow fine-tuning
of the time compression/expansion process.
They include the Ratio, Crossfade, Min Pitch,
and Accuracy sliders.
Ratio Sets the destination length in relation to
the source length. Moving the slider to the right
increases the length of the destination file,
while moving the slider to the left decreases its
length.
Crossfade Adjusts the crossfade length in milliseconds,
allowing you to optimize performance
of the Time Compression/Expansion according
to the type of audio material being processed.
(This plug-in achieves length modification by
replicating or subtracting very small portions of
audio material and very quickly crossfading between
these alterations in the waveform of the
audio material.)
Chapter 5: DigiRack Non-Real-Time AudioSuite Plug-Ins 49