DigiDesign Digidesign Pro Tools 8.0, Справочное руководство

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Chapter 26: Fades and Crossfades 511
Chapter 26: Fades and Crossfades
Using Fades
You can quickly and easily apply a fade-in or
fade-out on a audio region, as well as crossfades
between adjacent audio regions. Crossfading is
the process of fading between two regions of au-
dio to prevent pops, clicks, or sudden changes in
sound. Crossfades have many applications,
from smoothing transitions between regions to
creating special audio effects. The crossfade du-
ration, position, and shape are all user-defin-
able.
Fades are computed and written to disk. Cross-
fades that are written to disk are stored in a
folder named “Fade Files” within the session
folder. When you play back your track,
Pro Tools reads and plays back the fade file from
disk.
Pro Tools does not let you replace fade-ins and
fade-outs with crossfades. To add a crossfade be-
tween regions, any existing fade-ins and fade-
outs between the regions must first be deleted.
About Crossfades and Curves
To create a crossfade between two regions, use
the Selector tool to select across the end point of
the first region and the start point of the second.
The length of the selection determines the
length of the crossfade. Though fades may ap-
pear to be discrete regions, they cannot actually
be separated from the regions in which they
were created. You can, however, create fade-ins
and fade-outs for individual regions (see “Creat-
ing Fades at the Beginnings and Ends of Re-
gions” on page 519).
Use the Fades dialog to select, view, and manip-
ulate the curves used to perform fades and cross-
fades. Different volume curves can be assigned
to the fade-out and fade-in portions of cross-
fades. The Fades dialog can also render a preview
of the fade.
The following examples illustrate common
types of crossfades, and explain how the type of
selection you make determines the character of
the crossfade.
Pro Tools HD includes an AutoFade feature
that provides real-time fades without pro-
cessing them to disk (see “Using AutoFades”
on page 523).
Since crossfades are created by fading be-
tween overlapping audio material, a cross-
fade cannot be performed on regions that do
not contain audio material beyond their re-
gion boundaries.