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From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Re: Acoustic Feedback reduction
References: <email@example.com> <3E2590EC.firstname.lastname@example.org> <6IjV9.24901$jM5.email@example.com> <3E2602D5.194E2EEB@webaccess.net> <firstname.lastname@example.org>
Date: Thu, 16 Jan 2003 05:04:28 GMT
NNTP-Posting-Date: Wed, 15 Jan 2003 21:04:28 PST
Phil Allison wrote:
> "Ian Du Rieu" wrote in message
> > Hi,
> > In reality frequency shifters are only good for the spoken word.
> > Useless for anything involving music.
> ** Liar.
> > One toy much better than a frequency shifter is a pitch shifter.
> ** You have no clue about the topic.
Perhaps you can explain how a piano tone (a single note) survives a
frequency shift equal to 5Hz at all frequencies. To see what goes wrong,
remember that the overtones of a piano are slightly more than an octave
(pianos do not produce harmonics for physical reasons). This causes the
very well known stretching of octaves found in a properly tuned piano. A
piano does not sound like a piano unless the octaves are properly
stretched. The frequency shift upward will cause octaves to be
compressed or smaller than 2:1 (your 5Hz causes about a compression to
1.98:1 in the middle of the keyboard). Given the elementary fact that a
piano must have stretched octaves to sound like a piano, how can a piano
with compressed octaves sound familiar at all?
I once, BTW, built a simple electronic device to synthesize the entire
range of a piano to almost exactly equal tempering with exact octaves. A
piano tuned to this device was nearly intolerable in sound because of
the exact 2:1 octaves. However, retuning by ear to a single fork
restored the piano sound (this forces stretching of octaves). Clearly
the gigantic compression due to a 5Hz upward shift in frequency you talk
about would be much more damaging than the total of a few cents error
caused by tuning exact octaves.
You have not explained how harmony survives shifting and that is even
more elementary. Remember, people of experience with music have heard
about every possible way of screwing up harmonies by having tones
misplaced in frequency. Unlike Gibbo, you offer no tangible proof.
Unlike others who cite music theory, you offer no explanation of why 20
centuries of music theory is entirely wrong. In short, we have your word
and our conclusion must be that you are tone deaf.
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons email@example.com
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