Ok so here’s a correction about how to do Through Zero FM properly with Warps. In the original video I was modulating the channel’s level input (which turns to a 1v/oct input for the internal oscillator when active) which does work for FM but not through zero and there’s aliasing at higher frequencies. So to do this properly you use an audio rate signal into the channel’s input (normally the audio input when the internal octave isn’t active).

Check out the full Warps video here –
https://www.youtube.com/watch?v=iRLU5B4V-Jw