A set of custom made tremolo effects. As far as I know, the first 3rd party release to use LFOs, and I bet they will be among the most smooth, analog sounding tremolos you hear in your DAW. Lots of ideas, time, and effort went into these. They have dynamics on top of the LFO modulated level control (sampled from various hardware), so that makes them kind of complex in the Nebula world (in terms of what's "under the hood"). This means they might take a little more CPU than what you might be used to with Nebula stuff. They run fine on my system but it is newer. They aren't as intensive as reverbs but worse than preamp/console/tape stuff. It's the price to pay for fluid tremolo!
I've never been much of a tremolo kind of guy, but everyone should check this out. The audio demo he provided is nothing short of spellbinding. I will now be forced to rethink my non tremolo ways. Fantastic job Tim!
This is truly remarkable. I have never ever ever heard sounds fly around my room like this.