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From: "Phil Allison"
Subject: Re: Acoustic Feedback reduction
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Sat, 11 Jan 2003 14:07:06 +1100
NNTP-Posting-Date: Sat, 11 Jan 2003 13:56:39 EST
Organization: Telstra BigPond Internet Services (http://www.bigpond.com)
"fred bartoli" wrote in message
> Spehro Pefhany a écrit dans le message :
> > Many years ago in good old _Wireless World_ (long before "wireless"
> > acquired its present meaning(s)) there was a design published for a
> > device used to allow higher volume levels in PA systems before
> > feedback occurred (with a given microphone). IIRC, they used
> > one or two multipliers in a circuit that shifted the audio pitch by
> > around 10Hz.
> > Has this sort of thing been integrated into a single chip?
> Why not make it digitally ?
> Should fit easily in a small uc. With maybe internal 10/12b ADC+DAC.
> Not really a big deal.
** Then please do it. I would like to compare the cost/performance with
my all analogue one.
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