Kick + Noise, optional Drone from VCO2 by RiF
VCO1 plays kind of a Kick drum. The noise (like a dark hh pattern) can be controlled with the PITCH sequencer row.
VCO2 can be added by turning up VCO 2 LEVEL to add drone'y type of sound
Play with CUTOFF, VCF EG AMOUNT and VCF DECAY to get get some nice variations.
VCA EG into VCA CV amplifies the envelope and drives the VCA a bit more.