<html><body><font face="Helvetica">Pete--<br><br>I was able to find my copy. Print quality is not too great, but it certainly has the information you are asking about re how to determine the Walsh-Fourier coefficients for an arbitrary waveform. Computer code, too!<br><br>"If you should see any fish along the way, count them as negative birds." (BAH, EN #16)<br><br>Ian<br><br><br>Sent from XFINITY Connect Mobile App</font><blockquote><br>------ Original Message ------<br><br><b>From: </b>Pete Hartman<br><b>To: </b>synth-diy@synth-diy.org DIY<br><b>Sent: </b>September 13, 2017 at 10:39 PM<br><b>Subject: </b>[sdiy] Walsh Functions/EN S-008</blockquote><blockquote><html><div dir="ltr">There are a wide range of folks on here, including some who've been doing this stuff since ElectroNotes was young :) so I'm hoping maybe someone can help.<div><br></div><div>I was perusing old issues, in particular #16, which came with a supplement S-008 on Walsh functions. These functions were also discussed somewhat in #16 and a couple subsequent issues. However I don't have a copy of S-008, and after asking Bernie about it, he has so far been unable to locate a copy.</div><div><br></div><div>I suppose if I had my head more fully around the math of Fourier series it might not be so difficult for me, but I'm not grasping the entire idea of using the Walsh functions for waveform generation, and I'm kind of interested. My thought is that while, as Bernie points out in #16 and his paper for AES, the generated waveforms themselves aren't particularly notable, modulating the coefficients of the different waveforms might sound different than other types of waveform modulation. I'm interested to play around with it in any case. Big picture wise, I see the parallel to Fourier and understand the concept, I'm just not following the nature of the coefficients to generate specific waveform types.<br><br>I got the impression from the references to the supplement that it might help get me over the block I'm having. But not having it myself, and so far unable to get one from the source (despite his much appreciated search for same) the question turns to whether any of y'all out there might have a copy of S-008? If so, and if we can get Bernie's blessing (and probably send him a copy too), I'd be interested in some form of it that I could read.</div><div><br></div><div>Thanks!</div><div><br></div><div>Pete</div></div>
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