Adobe Premiere Pro CS6 - Manual (Page 300)

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you replay the audio with the track’s automation menu set to Read, Touch, or Latch, Premiere Pro plays back the track with the adjustments you
made. As you make adjustments in channels of the Audio Mixer, Premiere Pro applies the changes to their respective tracks by creating track
keyframes in a Timeline panel. Conversely, audio track keyframes you add or edit in a Timeline panel set values (such as fader positions) in the
Audio Mixer.
For each audio track, the selection in the automation options menu determines the track’s automation state during the mixing process:
Off Ignores the track’s stored settings during playback. Off allows real-time use of Audio Mixer controls without interference from existing
keyframes. However, changes to the audio track aren’t recorded in Off mode.
Read Reads the track’s keyframes and uses them to control the track during playback. If a track has no keyframes, adjusting a track option (such
as volume) affects the entire track uniformly. If you adjust an option for a track that’s 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 and Read mode
When you stop adjusting an effect property in Touch mode, the property returns to its initial value. This is also the case while in Read mode if a
keyframe exists for the affected parameter. The Automatch Time preference specifies the time for an effect property to return to its initial value.
Automating audio changes in the Audio Mixer can create more keyframes than necessary in the audio track, causing a degradation in performance.
To avoid creating unnecessary keyframes, thereby ensuring both quality interpretation and minimal performance degradation, set the Automation
Keyframe Optimization preference. In addition to the other benefits, you can edit individual keyframes much easier if they are assembled less
densely in the track.
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 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. For information about the Linear Keyframe Thinning and Minimum Time Interval Thinning options, see
Audio Preferences.
1. Choose Edit > Preferences > Audio (Windows) or Premiere Pro > Preferences > Audio (Mac OS).
2. In the Automation Keyframe Optimizations pane, select Linear Keyframe Thinning, Minimum Time Interval Thinning, or both.
3. Click OK.
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