[sdiy] Re: Walsh Generator Release!!!

[Brousseau, Paul E (Paul)]

Well!  Sounds terribly powerful, and more-than-just-a-little-bit like additive synthesis (which is probably closer to what Fourier sez, since I think most additive synths use sine waves?).

So what will the Walsh Generater chip take as input?  I assume that it has a mass of square wave generators and an internal mixer... perhaps it takes CV to dictate the amplitude, pulse width, and frequency of said squares?

(I wouldn't mind seeing the schematic...)

Thanks again!

--PBr

-----Original Message-----
From: John L Marshall [mailto:john.l.marshall at gte.net]
Sent: Monday, April 01, 2002 3:27 PM
To: Brousseau, Paul E (Paul); Synth-Diy
Subject: Re: [sdiy] Re: Walsh Generator Release!!!


Paul,

Fourier says that any peroidic wave is composed of an infinite series of
harmonically related sine waves. Walsh says that any periodic wave may be
composed of an infinite series of any other shaped wave. Of particular
interest are rectangular waves as they are easily produced with logic,
binary dividers and exclusive-or gates. One problem with Walsh functions is
that the results are not easily predicted when combining Walsh values. Walsh
values may be combined to produce a series of harmonically related sine
waves. This takes lots of mixing.

Electronotes had a series of articles on Walsh functions, many years ago.