I've given that a careful listen. What gives it the slow warble - the chorus? It's got an occasional quick delayed vibrato and slop as well. It's a distinctive sound, and worth posting all by itself. Thanks for the chance to study it a bit.
It's very simple. I made it in a way that could have also been realized on a Prophet-5 - mostly. It's two sawtooth oscillators slightly detuned and the filter envelope does that soft brass attack. There's also a bit of slop; my default is mostly something between 20 and 40%. For more expression, the velocity controls the lowpass filter and aftertouch controls the LFO intensity, which in turn modulates both oscillators' frequency. In the PolyMod section the filter envelope modulates oscillator 1's waveshape and oscillator 2 slightly modulates the lowpass filter to add a bit of sizzle.
The slow warble is Flanger 2 with a slow frequency, a high amount setting, and moderate intensity. That's the effect I was talking about earlier in another thread. It can basically sound like like an LFO that continuously modulates the frequency of both oscillators. The second effect is obviously a hall reverb. That's basically all.
The rule was also to only use internal effects, apart from the casual mixing tools. So this track doesn't feature any external reverbs, delays, or whatsoever.
I'm also quite happy with the simple but effective bass sound. This time, I followed the advice that a clear and distinct bass sound sometimes works way better if you only select one oscillator.