[sdiy] Walsh Generators

[Grant Richter]

Walsh, like Fourier is one of multiple sets of independent (orthogonal)
functions that can be summed to make "any" waveform. Fourier is the most
common since it uses sine waves which we can relate to directly. I would
have to look it up, but there are more than just those two.

Bernie Hutchins expressed interest in the Walsh series since construction
the basic functions only required counters and XOR gates. So the hardware
was simple to construct without a software based processor.

I think it was David Hilbert who unified all the different transforms into
an infinite dimensional vector space?

> From: harrybissell <harrybissell at prodigy.net>
> Date: Thu, 17 Mar 2005 23:28:45 -0800
> To: Aaron Lanterman <lanterma at ece.gatech.edu>
> Cc: Glen <mclilith at charter.net>, ASSI <Stromeko at compuserve.de>,
> synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] Walsh Generators
> 
> It 'is' cool in a way... but not as directly useful as sweeping a filter, or
> a pulse width.  Or pulling out harmonically related drawbars on an organ.
> 
> Guess it depends on how fast you want to hear your results... or maybe on
> how many spare fingers you have :^P
> 
> H^) harry
> 
> Aaron Lanterman wrote:
>