Adobe Premiere Pro CS4 - Manual (Page 233)

227 USING ADOBE PREMIERE PRO CS4
Editing Audio
Last updated 11/6/2011
set to Read automation, the option returns to its former value (before the current automated changes were recorded)
when you stop adjusting it. The rate of return is determined by the Automatch Time preference.
Write Records adjustments you make to any automatable track settings that aren’t set to Safe During Write, and
creates corresponding track keyframes in a Timeline panel. Write mode writes automation as soon as playback starts
without waiting for a setting to change. You can modify this behavior by choosing the Switch To Touch After Write
command from the Audio Mixer menu. After playback stops or a playback loop cycle is completed, the Switch To
Touch After Write command switches all Write mode tracks to Touch mode.
Latch Identical to Write, except that automation doesn’t start until you begin adjusting a property. The initial property
settings are from the previous adjustment.
Touch Identical to Write, except that automation doesn’t start until you begin adjusting a property. When you stop
adjusting a property, its option settings return to their previous state before the current automated changes were
recorded. The rate of return is determined by the Automatch Time audio preference.
Set Automatch Time for Touch mode
When you stop adjusting an effect property in Touch mode, the property returns to its initial value. The Automatch
Time preference specifies the time for an effect property to return to its initial value.
1 Choose Edit > Preferences > Audio (Windows) or Premiere Pro > Preferences > Audio (Mac OS).
2 Enter a value for Automatch Time and then click OK.
Specify the automated keyframe creation
Automating audio changes in the Audio Mixer can create more keyframes than necessary in the audio track, degrading
performance. To avoid creating unnecessary keyframes, thereby ensuring both quality interpretation and minimal
performance degradation, set the Automation Keyframe Optimization preference. In addition to providing other
benefits, this preference makes editing individual keyframes easier because they are less densely arranged on the
keyframe graph.
1 Choose Edit > Preferences > Audio (Windows) or Premiere Pro > Preferences > Audio (Mac OS).
2 In the Automation Keyframe Optimizations area, select one or both of the following options, and then click OK:
Linear Keyframe Thinning Creates keyframes only at points that don’t have a linear relationship to the start and end
keyframes. For example, suppose you are automating a fade from 0 dB to –12 dB. With this option selected, Premiere
Pro creates keyframes only at the points that represent an increase in value from the beginning (0 dB) and ending (–
12 dB) keyframes. If you don’t select this option, Premiere Pro may create several incremental keyframes of identical
values between those two points, depending on the speed at which you change the value. This option is selected by
default.
Minimal Time Interval Thinning Creates keyframes only at intervals larger than the value you specify. Enter a value
between 1 and 2000 milliseconds.
Panning and balancing
About panning and balancing
By default, all audio tracks output to the sequence’s master audio track. Because tracks may contain different numbers
of channels than the master (depending on whether they are mono, stereo, or 5.1 surround tracks), it’s necessary to
control what happens when a track outputs to another track containing a different number of channels.