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From: "Phil Allison"
References: <email@example.com> <96dU9.21919$jM5.firstname.lastname@example.org> <7KK7UhBclYI+Ewnc@jmwa.demon.co.uk> <2ZkU9.22426$jM5.email@example.com>
Subject: Re: Acoustic Feedback reduction
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Mon, 13 Jan 2003 11:08:48 +1100
NNTP-Posting-Date: Mon, 13 Jan 2003 10:58:19 EST
Organization: Telstra BigPond Internet Services (http://www.bigpond.com)
"John Woodgate" wrote in message
> I read in sci.electronics.design that Phil Allison
> wrote (in <2ZkU9.22426$jM5.firstname.lastname@example.org>) about 'Acoustic
> Feedback reduction', on Mon, 13 Jan 2003:
> > In your signature, John, it says something about "professional sound
> >reinforcement" - well that is the area of technology I work in.
> There is, indeed. Wanna join? (;-) We do have a few members in Oz.
> In spite of my abysmal ignorance, I still find that I have knowledge to
> pass on that people find helpful. But a lot of what I do for the
> Institute is managerial.
> > If you have ever seen a working PA or SR system there in the FX
> >you will find a digital effects processor, possibly made by Yamaha,
> >Lexicon, TC Electronics et alia.
> I haven't noticed one in the local municipal hall. There's an old
> Millbank amplifier, a couple of loudspeakers and two microphones. There
> are *millions* of rigs like that, compared with the thousands that are
> as you describe.
** That is a "PA system" - old style and NOT "professional sound
The latter phrase refers (IME) to modern live entertainment SR
systems - or "PA rigs".
> > They all have a pitch shift function but never a frequency shift
> Have you got that the right way round? I thought that pitch shift was
> not helpful in a live sound system?
** Yep - the function is there for vocal and instrumental effects only.
I have been long looking for but never come across a digital frequency
shifter - I figure it must be hard to do as well as an analogue one.
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