Minimal Audio have released their flagship product, Rift, with an early adopter discount of 40%(ish), $75 rising to $129 at a non determined date in the future. It's a highly modulateable distortion/filter hybrid that allows you to specify seperate settings for the positive and negative portions of the waveform, and control where that division of +/- lies. Having spent an hour tinkering with it, I can guarantee that I won't be taking advantage of the 30 day money back offer.
https://www.minimal.audio/products/rift