[PD] feedback stability..?

Charles Henry czhenry at gmail.com
Mon Sep 15 22:45:05 CEST 2008


What does blackbox~ do?  Is it linear?

On Mon, Sep 15, 2008 at 3:18 PM, Damian Stewart <damian at frey.co.nz> wrote:
> 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]
> | ______/
> |/
> [blackbox~]
> |\______
> |       \
> |       [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?
>
> thanks
> d
>
> --
> damian stewart | skype: damiansnz | damian at frey.co.nz
> frey | live art with machines | http://www.frey.co.nz
>
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