Drone by Jürgen Bottrop

Drone self-playing

Saw this patch in a video by Artur Strzępka (https://www.youtube.com/channel/UCiBZWeaYsMq7I399O-walFg), and it's worth being listed here.

I recommend adding a long reverb and some delay, also some overdrive won't hurt. Play with VCO Frequency, VCF Cutoff, Resonance, and LFO Rate!