Wave Shaper Nodes

What are Wave Shaper Nodes?

According to MDN:

The WaveShaperNode interface represents a non-linear distorter. It is an AudioNode that uses a curve to apply a wave shaping distortion to the signal.

Where is this used?

This application uses the WaveShaperNode interface as part of the synthesis of the snare drum. It's used to gradually lower the amplitude of the pair of triangle waves used to generate the snare.