Fw: "The Invisible Tool"/beat rates - and where they come from

Michael Gamble michael@gambles.fsnet.co.uk
Mon, 20 Oct 2003 21:07:58 +0100


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Hello Bob
Yes, I agree. There is no likelihood of the exact science of sound and =
its harmonics being produced text-book fashion in the piano. The =
principle  applies though - and I doubt it's far removed from the "text =
book" version. What say you?
Michael G (UK)
----- Original Message -----=20
From: BobDavis88@aol.com=20
To: pianotech@ptg.org=20
Sent: Monday, October 20, 2003 4:54 PM
Subject: Re: "The Invisible Tool"/beat rates - and where they come from


In a message dated 10/20/2003 8:24:56 AM Pacific Standard Time, =
michael@gambles.fsnet.co.uk writes:


  Take your M10 based on A# (which computes at 466.16376.....)The 5th. =
harmonic of that A# =3D 2796.9826...... the M10 is F(which computes at =
1396.9129.......) The 2nd. harmonic of that                    F =
=3D2793.8259...... There we have a difference of 3.1567..... Hz which is =
the beat you hear


Sorry, no. Have you read the recent replies on inharmonicity? You might =
be correct for organ tuning, but not for piano. On the piano, partials =
are not exact multiples on ANY note, covered or metal; and not even in =
the temperament octave are notes PRECISELY related by the 12th root of =
two. It's just a little wider.

Bob Davis 
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