Stereo Delay is a post-effect. When connected to a Source block, it creates an adjustable echo of the incoming audio, which bounces back and forth between the left and right stereo channels.
In the options, ‘Delay Time’ sets the amount of time until the echo is heard. ‘Feedback’ sets how many echoes of the delayed signal we hear. ‘Mix’ controls how much of the delayed signal can be heard.
This Delay makes use of the Tone.js PingPongDelay component.