Sobor is technically based on Feedback Delay Networks (FDNs) with the Hadamard matrix and uses self-modulation techniques

3 and 4 including:

Haze views

Smart mix output where both microphone signals can be sent together

Cylindrum Retro Bilstereo Sobor is technically based onAbout The Cylindrum is a massive tuned percussion instrument designed using the principle of open and closed air column resonance. The instrument was constructed by Gregg Stephens with the help some rather involved mathematics, plenty of elbow grease and quite a few bloody fingers. The end result is a massive 20 foot long tuned percussion instrument with a pitch range spanning a full 4 octaves. Overall, it sounds like a strange organic synthesizer