Getting audio key frames out of After Effects using Trapcode Sound Keys

Posted by on May 16, 2010 in After Effects, how to, motion graphics | One Comment

You can use Trapcode Sound Keys to create audio driven animation in After Effects. You can also save the key frames to a text file, and use them in other animation applications.


1. Create a solid layer.
2. Apply the Sound Keys Effect to the solid.
3. Add an audio layer to the timeline, then assign that layer to drive Sound Keys from the “Audio Layer” drop-down.

4. Select the frequency range that you want to capture from the spectrum.
5. Adjust the work area in the time line to reflect the range of keys that you would like to capture.
6. Click the “Apply Button”. Sound Keys will create keys in the timeline.

7. Select and copy the keys. Paste the keys to a text file.

Should look something like this:

Adobe After Effects 8.0 Keyframe Data Units Per Second 29.97 Source Width 900 Source Height 506 Source Pixel Aspect Ratio 1 Comp Pixel Aspect Ratio 1 Effects Sound Keys #1 Output 1 #22 Frame 0 0 1 0 2 0 3 0 4 0.000261479 5 0.00608461 6 0.0153011 7 0.0274689 8 0.0395869 9 0.0493024 10 0.0562797 11 0.0557284

Extra information about copying and pasting data.

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1 Comment

  1. bs219
    April 17, 2012

    it this work
    pls add a tutorial of this pls……..

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