[sdiy] Re: Walsh Generator Release!!!

[Scott Gravenhorst]

Much agreed, but has anyone played with an anologue
Walsh machine's parameters, much like a drawbar system?
(at length).  I submit that I understand that "Walsh 
coefficient drawbars" are different from "sine harmonic 
drawbars", but is it a system that is musically, 
creatively useful?  I.e., are they as useful as sine 
based drawbars given you mess with (read:learn) them 
enough?  Can I sit in front of a Walsh console and make 
what I need?  (subtracting a prejudice I may have if I 
am accustomed to sine).  Or is it so weird that it's 
too weird?  (heh heh, I'm saying "too weird" to THIS 
group <grin>)...

For example:
How many of us have sat down with 10 sine wave harmonics
with 10 EGs, one per harmonic and made sounds which change
over time ?  And also done this with Walsh.  Not me for 
sure, but I wonder, if my initial source was Walsh and not 
sine harmonic series, what would I prefer?


"John L Marshall" <john.l.marshall at gte.net> wrote:
>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.
>
>Take care,
>
>John
>
>
>
>Decades ago a built a little synthesizer that used Walsh functions
>----- Original Message -----
>From: Brousseau, Paul E (Paul) <noise at avaya.com>
>To: Synth-Diy <synth-diy at dropmix.xs4all.nl>
>Sent: Monday, April 01, 2002 2:55 PM
>Subject: RE: [sdiy] Re: Walsh Generator Release!!!
>
>
>> For the Walsh-impared, can you give a brief reminder of what one of them
>thingies does?
>>
>> And for the technically-impared, what is a CPLD?
>>
>> Thanks!
>>
>> --PBr
>

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