circuit bent Kawasaki Mega Deluxe toy drum pad

I added a pitch knob and 1/4" line out jack. This video just shows the drum sounds and some of the included loops. Towards the end, it also shows the flanging effect that happens when you repeatedly trigger the same sound. I'm not sure if it's a feature or defect, but it is pretty cool. It could be that it gets confused and triggers the same sound more than once, causing phase cancellation?