"The 291e is doing all the timbre modulation here. Just two oscillators (259e & 261e) mixed into the 'all in'. I've set some stages in the internal sequencer and i am morphing the seq with CV. I took each of the three nodes out separately to the 227e where i do some pan modulation. You hear frequency and bw LF modulation and some AR FM modulation in one of the nodes (different amounts at different stages). This is a very fun filter to program."
Update: BTW, if you want to see and hear another example of a Buchla (in this case the original 200), check out the video in this post of Suzanne Ciana yesterday.
Images for reference (click each for larger shot):














































