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From: fish@ihu1g.UUCP (Bob Fishell)
Newsgroups: net.audio
Subject: Re: The stuff square waves are made of ....
Message-ID: <449@ihu1g.UUCP>
Date: Mon, 25-Jun-84 12:06:25 EDT
Article-I.D.: ihu1g.449
Posted: Mon Jun 25 12:06:25 1984
Date-Received: Thu, 28-Jun-84 01:22:42 EDT
References: <494@drutx.UUCP> <2546@allegra.UUCP>, <139@brl-vgr.ARPA> <1692@tekig1.UUCP>
Organization: AT&T Bell Labs, Naperville, IL
Lines: 18

I hope this will be the LAST WORD on this argument...

The Fourier series for a square wave is given by,
                                                                        
           ___o_o__                                                       
           \    |                                                       
            \                                                           
   f(x)=     >    (1 / (2 * i - 1)) sin ( (2 * i - 1) * x )       
            /                                                           
           /____|                                                       
            i = 1                                                       
                                                                        
Thus the first component encountered after the fundamental is (sin(3*x))/3,
or a frequency 3 times that of the fundamental.
-- 

                               Bob Fishell
                               ihnp4!ihu1g!fish