feedback               
                                      
                            
                            
                                          
 feedback is for  making  the  process  a 
 whole  lot  more messy,  to  introduce a 
 fractal  in the  spice mix...  things or 
 populations of things start to  be  self 
        referential or self eating        
 (autovore...) or spiraling in  or out... 
                                          
 in the sixties  they did research in the 
 jungle  and in  the sea  and  they found 
 that  feedback does not give rise to  an 
 equilibrium.  they were trying  to prove 
 that nature is a  tame beast. but  she's 
                   not!                   
 this  may  hold  true out  there...  but 
 maybe not in signal wizardry?  depending 
 on  your  technique,  you  might  easily 
             find recurrences.