[PD] Re: feedback

Chris McCormick chris at mccormick.cx
Tue Mar 22 06:55:36 CET 2005

On Tue, Mar 22, 2005 at 12:25:41AM -0500, Spencer Russell wrote:
> On Tue, Mar 22, 2005 at 08:33:33AM +0800, Chris McCormick wrote:
> > 
> > Perhaps I'm smoking crack, but I seem to remember from the music-dsp
> > list that you can just drop the pitch of the input sound a few Hertz
> > to get rid of feedback. In a digital system this is easily accomplished
> > by lowering the sample rate slightly right after sampling.
> > 
> > 
> So if the performer whistled into the microphone at 440Hz, the
> sound coming out of the speaker would be at something like 435Hz?
> That'd make it mighty hard to sing/play in tune, because
> everything you did would sound flat. Also, if the output is
> slower then the input, you'll end up with a gradually lengthening
> delay effect(which could be kinda cool, but probably not what
> most people are looking for). Maybe I'm misunderstanding what
> you're saying.

Yeah you're totally right. Maybe it was just for use in a public address
type of situation. Or maybe I was REM dreaming when I heard/read it.
Apologies for the confusion!



chris at mccormick.cx

More information about the Pd-list mailing list