The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
References: <firstname.lastname@example.org> <0QLT9.20902$jM5.email@example.com>
Subject: Re: Acoustic Feedback reduction
Organization: Nobody nowhere
X-Newsreader: Microsoft Outlook Express 6.00.2720.3000
Date: Sat, 11 Jan 2003 08:41:40 -0000
NNTP-Posting-Date: Sat, 11 Jan 2003 08:41:46 GMT
"Phil Allison" wrote in message
> "Walter Harley" wrote in message
> > "Nico Coesel" wrote in message
> > news:firstname.lastname@example.org...
> > > There is another way though developed by someone named Larssen. He
> > > came up with a system that shifts all frequencies by a few Hertz.
> > ...a technique which I certainly hope would be applied only to spoken
> > and not to music. Harmonic relationships don't hold up when
> > frequency-shifted.
> ** Yes they do - long as the shift is not too much.
> > In the music reinforcement business, the typical technique these days is
> > use dynamically-tuned notch filters (much narrower than a graphic EQ),
> > notch out the particular frequency of the problem. Sabine, Behringer,
> > make these.
> ** These units affect the sound quality MUCH more than a +4 Hz shift.
> They can only notch a handfull of different frequencies. A frequency
> shifter can kill up to 2000 simultaneously with no change in tonal
> no set up and no need to alter settings for room full or empty.
It would cetainly be noticable with miked up acoustic instruments, e.g. a
piano. People would here the piano itself and the piano +4Hz sharp coming
out of the PA system, it would sound horrible. As Walter pointed out they
notch out the offending feedback frequencies. by a couple of dB. Which has
much less affect on the tonal quality than listening to an instrument that's
SHARP or FLAT.
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup