Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual page 132

• RAM preview doesn't generate interlaced fields, so a saved RAM preview never contains fields.
Note: The 3D View of the active composition panel must be set to Active Camera for Save RAM Preview to work, even
if the composition doesn't contain 3D layers.
After you generate a RAM preview, choose Composition > Save RAM Preview.
1
2 Type a name, specify a location, and click Save.
Loop options for previews
Click the Loop Options button in the Time Controls panel until it shows the desired state:
Repeatedly plays preview from beginning to end.
Loop
Plays preview once.
Play Once
Repeatedly plays preview, alternating between backward and forward play.
Ping Pong
Preview audio
When you preview audio, it's played back in real time, unless you've applied Audio effects other than Stereo Mixer,
in which case you may have to wait for audio to render before it plays back.
Note: If audio must be rendered for a preview, then only the amount of audio specified by the Duration setting in the
Previews preferences will be rendered and played for the preview.
Set the sample rate for audio for the entire project in the Project Settings dialog box (File > Project Settings). CD-
quality sound is 44.1 KHz, 16-bit stereo.
The Audio Hardware and Audio Output Mapping preferences determine the behavior of audio previews. These
preferences do not affect final output. The quality of audio in final output is determined by the output module
setting.
• To preview only audio from the current time, choose Composition > Preview > Audio Preview (Here Forward) or
press the period key (.) on the numeric keypad.
• To preview only audio in the work area, choose Composition > Preview > Audio Preview (Work Area) or press
Alt+period (.) (Windows) or Option+period (.) (Mac OS) on the numeric keypad.
Audio panel options
During previews, the Audio panel's volume unit (VU) meter actively displays audio volume levels. At the top of the
VU meter, signals indicate when the audio is clipping—a distortion that occurs when the audio signal exceeds the
maximum level that the audio device allows.
To view the VU meter and levels controls in more detail, increase the height of the Audio panel.
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User Guide