How to Automatically Sync Audio Across Comps

Emanuele Colombo shares an easy way to sync audio automatically across various compositions in After Effects.

Comps and nested comps are a great way to organize and work more smartly in After Effects. When you are working with a large number of compositions, the problem becomes how do you keep audio synchronized across all of your timelines? With a little expression of course. Animator and motion designer Emanuele Colombo demonstrates with this short quick tip – How to automatically sync audio.

The key to the trick is a little expression that you can easily copy and paste to be on your way. The expression is:

MasterC = “Name of your main composition here”;
PreC =;

C = comp(MasterC);
L = C.layer(PreC);
Main_T = time + L.startTime;

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