Feedback control for performing with audible ecosystem

This patch in an alternative way to deal with positive feeback-loop considering the audible ecosystem paradigm. In contrast to other approaches, here the positive feedback is controlled from the signal-to-noise ratio and modeled by the signal amplitudes simultaneously. It is part of the Spatial Instrument, in developing by this author.

Download: https://zenodo.org/record/5649265#.YZU1omDMKrw