Tremolo is from way back. It works in a rather special way. Rather than simply modulate loudness, Tremolo modulates spatial depth. That’s done through exploiting the qualities the ‘Density’ algorithm has for pushing stuff back in space (and making it thin and wiry) or bringing it forward (and making it fat and distorted).
Tremolo puts that behavior on an LFO, so you can get a really old school tube-style tremolo going. It doesn’t have facilities to trigger the LFO, so there’s no way to sync it up, but because of the way it works you’ll hear some output even at its ‘thinnest’ point.
Hope you like it!