Ping-Pong (Cross) Echo.

A Ping-Pong Echo is much like a normal echo, except that its a stereo effect and the left signal feeds back to the right channel, and the right channel feeds back to the left channel, bouncing the signal back and forth across the stereo field.
Hence the term ping-pong delay. Shown below is a schematic diagram of a cross delay.

Creating our Ping-Pong echo in SynthEdit.

To create a Ping-Pong Echo in SynthEdit we must use an external feedback path rather than the Delay2 module’s internal feedback circuit and as you know if you try to create this structure with a normal feedback path, you will get the error message: “This patch contains a FEEDBACK path, Please remove.”
We get round this problem using a pair of Feedback – Volts modules to create feedback paths that are acceptable to SynthEdit.
See the layout below:

For the sake of simplicity I have kept to one set of controls for both left and right channels, but there’s nothing stopping you from having separate controls for left and right channels.
Of course you can build on this to add HF Damping into the feedback loop, displays to show the delay time etc.