Sillitoe wrote:Is this system posted by Bahndahn a similar example to what is being discussed here?
https://cycling74.com/2015/02/04/transforming-room-sound-with-a-max-patch/
The time it takes for a deviation of air particles to travel through air to the obstruction [i.e. sound from snare-drum to panel of glass 5 feet away] is very substantial compared to the time it takes for a feedback signal to be amplified, polarity inverted, and summed etc. therefor the referenced system differs most notably in the time-frame domain, but the two are essentially similar.
There are a number of other differences I can think of between the two, but I am butting myself out in thoughts of this. Depending what way you look at it, it could appear more, or less similar.
Of course, most of the dialog on this form is geared towards making a feedback system that is spectrally transparent, however some crazy things could be done with selective positive & negative feedback, simultaneously. The cutterhead system behaves in a unique way when compared to other 'signal processors'. The 'effects' one could get out of experimental feedback could be very fun -- however that is totally off topic.