[PD] feedback stability..?

Damian Stewart damian at frey.co.nz
Mon Sep 15 22:18:45 CEST 2008

hey pd,

i'm trying to do feed forward in pd. i think i'm tired and not thinking 
this through...

so, i have a [blackbox~] that does stuff to the audio. it uses feedback 
internally and is currently a bit unstable. can i make it more stable by 
going like this:

[...]   [r~ fb]
|       |
|       [*~ -0.1]
| ______/
|       \
|       [s~ fb]

is there some funky combination of delays i can achieve this? i get the 
feeling this only works in analog electronics because you can say that on 
some level everything happens at exactly the same time - the delays 
inherent in digital systems mean that this doesn't work...

what alternative DSP techniques are there for damping unstable feedback loops?


damian stewart | skype: damiansnz | damian at frey.co.nz
frey | live art with machines | http://www.frey.co.nz

More information about the Pd-list mailing list