Adding markers synchronized 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. Once markers are created, you can use them to synchronize video or other effects.

To synchronize markers to dialogue:

1. In the Time Controls window, click the Audio button  and then click the RAM preview button .
2. At the points in time where you want to add a marker, press the asterisk key (*) on the numeric keypad to create a layer marker.
3. When previewing is complete, double-click a marker you just created, type a descriptive label in the Comment box (such as a word being spoken at that time), and click OK. Repeat for any other markers you added.