Klarinet Archive - Posting 000299.txt from 2001/03

From: "Lacy, Edwin" <el2@-----.edu>
Subj: RE: [kl] piano frequencies
Date: Mon, 12 Mar 2001 13:08:29 -0500

> As I understand this, the half step above 440 is 466 (Bb) thenC is 494, C#
is 523...is this
> correct?

A = 440
Bb @-----.16
B @-----.88
C @-----.25
C# @-----.

You had asked for a reference on the web, but I didn't have one of those. I
got this from one of those old-fashioned books. In this case, it was "The
Acoustical Foundations of Music" by John Backus. I think you will find
similar charts in nearly every acoustics textbook.

Backus lists the frequency for every pitch (in the equally-tempered scale)
in hundredths of a cycle. From 440 Hz it is possible to calculate the
frequency of every other pitch using the function "twelfth root of 2," but
it has been too long since I have tried to do that. It's easier for me to
look them up.

Ed Lacy
el2@-----.edu

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