Reaver

I was looking for a device that overlayed a sample on top of an audio track like this one but this one seems to only do that when the button is pressed and that button is not mappable to anything sadly and doesn't play when u hit play when the input signal is played either. If it did those things would be a crazy helpful device cause I haven't seen anything like that out there so far and kind of can't believe no one's done it yet or maybe I haven't looked enough.