Synchronize markers to audio
After Effects provides a quick way to add and label markers for significant points in a layer’s audio track, such as a rhythmic beat in music or spoken words in dialogue. After markers are created, you can use them to synchronize video or other effects.
- In the Time Controls panel, click the Audio button
, and
then click the RAM preview button 
. - At the points in time where you want to add a marker, press the multiply key (*) on the numeric keypad to create a layer-time marker.
- When previewing is complete, double-click a marker you just created, and add comments or otherwise modify the markers as you would any other layer-time markers.
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