You might want to check out the feedback instrument in ImproSculpt.
Build in Csound and Python, it uses both internal (csound bus) and
external (csound out->speaker->mic->csound in) feedback, and it
utilizes a slow feedback destroyer to enable exploring different
feedbakc harmonics.
http://improsculpt.sourceforge.net/pmwiki/pmwiki.php

best
Oeyvind

2008/4/19, Aaron Johnson <aaron@akjmusic.com>:
> Anyway, has anyone tried to play around with chaotic signal paths by
> implementing 'feedback loops'?
>
> Best,
> Aaron Krister Johnson
>