Velay - A Visual MIDI delay effect in Processing.
Velay is a 100% MIDI effect you can use with any MIDI host of your choice. I tested it in Ableton, but it should work with anything, including external hardware.
It gives you an entirely visual way to manipulate a delay effect, and because it’s MIDI, you can do whatever you want with it. Velay doesn’t process any audio.
Code and binaries are here on github, download it and check it out, should work on OSX/Windows/Linux just fine.