There are several timbres:
227e A and C ate the Balanced Modulator (Lower part of 285e)
227e B is Bass from 261e, first filtered (B), then VCA'd (A) through 292e
227e D is timbrally very rich, a great complement to (and the same timing as) the bass in 227e B.
281e A goes to 292e A, B, D and Balanced Modulator Timbre input
281e C is the main clock
the 227e's submixer's "in th mix" is disabled to avoid bleed-through, but must be enabled to get the signal from the 207e's output
DON'T change the timing (281e C)!
play slowly with the sequencer (manually) on the 291e. The sequencer is also the same timing as Bass (282e C)
To Do:
tweak the 291e for a more convincing sequence