Well frankly it sucks. Has anyone been able to get anything not cartoon-like out of it?   I've messed w the speed, even looked up and tried to the speed of the originals, no joy. It's way overmodulated maybe, just completely artificial and fake to me, nothing like the original, which I love, like for instance this:   You can't change the modulation depth, and lowering the mix control doesn't make sense, both in terms of what's being modeled, and because it's so band-limited, mixing it wit