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From: "Richard Freeman"
Subject: Re: Acoustic Feedback reduction
X-Newsreader: Microsoft Outlook Express 5.00.2919.6700
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Date: Wed, 15 Jan 2003 11:53:30 +1100
NNTP-Posting-Date: Tue, 14 Jan 2003 19:51:31 EST
"Gibbo" wrote in message
> "Kevin Aylward" wrote:
> >Phil Allison wrote:
> >> "Don Pearce" wrote in message
> >> news:firstname.lastname@example.org...
- - -- - - snipped a bunch of argument - - - -
> >This is complete nonsense. For starters, I tune keyboards by counting
> >beats between flattened fifths. Secondly, a simple experiment with a
> >synth playing a sine wave E (82Hz), will demonstrate immediately that it
> >will clash with an F.
> >Oh, I have been playing guitar for "some while", and I just *tried* this
> >test with my brothers Korg, so your pissing in the wind on this one
> I guess the proof is in the eating. I couldn't find anyone with a
> shifted so we had to make do and mend........
- - - - - snipped description of an experiment ---
> With all the frequencies spot on it sounded like an acoustic guitar.
> distorted as would be expected. The *slightest* detuning of *anything*
> happened after a few seconds by itself) caused the entire sound to become
> completely unmusical. Even a measured 2Hz difference messed the entire
> so badly it was completely unlistenable. A single low E string became
> completely out of tune with itself at 2Hz shift. Top E was not so bad
> frequency difference was about 10Hz. At 2Hz shift the real played music
> Unless there is some major difference between the above experiment and a
> 5Hz frequency shifter designed for feedback reduction then I really fail
> how one could *ever* be used for anything involving music.
There must be major differences between your test setup and a real shifter
because I have used frequency shifters and with normal music running through
them any artifacts are very difficult (if not impossible) to hear in fact
inaudible to me, certainly a long long way from your 'Completely
unlistenable' as far as feedback killers are concerned I have found
frequency shifters to work very well even better than the Sabines.
I am almost willing to bet that the guitar is unlikely to be tuned
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