After watching Joran from Joranalogue talking about his new Generate 3 VCO I was captivated by this ‘through zero sweep’ idea.
Looking a bit I relized I have Klirrfactory Morph OSC and it just happens to have this through zero modulation. If you can find any other oscillators that have this, and in general any ideas or comments you have on the sound. Its pretty cool (and yea, I need $400 for his new Generate 3 VCO).