haha that is a crazy idea for a noise patch. I don't have a full picture of exactly how it's working, but the CREASE output is a combination of inverter & schmitt trigger (half of a Triangle-core oscillator). I always suspected this thing could oscillate in some kind of way but never poured enough time to figure out just how.
A couple interesting patches I found experimenting w this idea. Pls note there's probably a lot of variation module to module when it comes to these fringe cases.
Output from MAC
CREASE > OR(1)
OR(out) > SURVEY
FOLLOW > SURVEY (w stackcable)
With Survey control around 9:00 you hear the 'thud' discontinuity. Turning clockwise you get supersonics eventually approaching 'helicopter' noise as if the noise is being processed by a square tremolo. Further CW the 'square' trem becomes wider in pulsewidth until it's just 'noise', and further still you get what sounds like HF filtered noise for that crackly radio sound. All of this is between 9:00 and 10:00 on the dial. With some very touchy movements there's a chaotic sounding HF oscillation at 12:00 when approached from the CCW direction.
Output from MAC
CREASE > external VCA (at max level)
ext. VCA > OFFSET
LEFT > SURVEY
FOLLOW > SURVEY (stackcable)
With Survey from 10:00 and further CCW Cold Mac will create a rhythmic drum sound. Kind of like a kick with some harmonics & short decay. It will playback with a relatively regular (and fast) rhythm. Different kinds of VCA (or attenuator) will change the character of the sound. Using the GATEs in isms results in 3 very different timbres. Once you have it thudding away, experiment w the VCAs level & Survey control to find a huge range of self-generating sounds.
Ed: Adding additional VCAs or active attenuators to this patch creates lower-pitched sounds & more room for inconsistent edge-case rhythms.