This is a thread I've been wanting to make for a while. It'll essentially be profoundly nitpicky questions about very specific things, ranging from so obvious I'm stupid to not know them to unanswerable. To kick off, I'd like some help in recreating this synth in the beginning of Nightmare from F/SN.

https://www.youtube.com/watch?v=Q1cRk5CQRN4

The main issue are the waveforms being employed. I have no idea what they are whatsoever. I don't think they're distorted enough to be a saw or pulse, either that or the filter is very agressive. But whenever I try using sines, it just doesn't work out. Is it FM? I'm not sure. The rest is fairly easy to identify; stereo delay, one with quarter notes, one with eight notes either normal or dotted; a pluck envelope for the actual distorted waveform, which I think may be a saw; and a full sustain envelope for the waveform I can't identify.

I'd like it if somebody could help, as I have no idea what it is.