Creates a shape for the waveform of an audio file. Can be applied to any shape or mask path.

Usage

1. make sure the audio file is in your comp and audible
2. create audio keyframes via the Ae menu command Animation->Keyframe Assistant->Convert Audio to Keyframes
3. In the "Audio Amplitude Slider" parameter of the expression choose one of the sliders created in step 2
4. apply the expression to the shape path property that should become the waveform