Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!ub.d.umn.edu!jbovitz
From: jbovitz@ub.d.umn.edu (Jeffrey Bovitz)
Newsgroups: comp.music
Subject: Re: Musical Frequencies
Message-ID: <561@ub.d.umn.edu>
Date: 13 Dec 90 04:14:19 GMT
Sender: jbovitz@ub.d.umn.edu
Distribution: usa
Organization: University of Minnesota, Duluth. Information Services.
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A bit ago, someone (from Georgia Tech) wanted a list of the frequencies
for musical notes.  My brother has a solution.   Chris...?

Thanx Jeff.  The formula is based upon a Middle "A" of 440 Hz.  
The formula goes:

  
      440 * ((2)^(1/12)) ^ h
       
       (i.e.  440 Hz * (the twelfth root of 2) raised to the h power)
       where h is the number of half-steps above or below Middle A.

For example, Middle C is 8 half-steps below Middle A, so h=-8, and
the freq of Middle C is 261.6 Hz.  Remember that there are 12 half-
steps in an octave, and an octave is defined as doubling of the
frequency.  BTW, this formula works great on a spreasheet.

Hope this helps.

Chris Bovitz   moonunit@meteor.wisc.edu