[sdiy] Re: Walsh Generator Release!!!

[Tim Ressel]

Well, now that you mention it, I wrote a VB app that
does just that. Its not quite ready for prime time,
but if the interest is there, I can whip it into
shape. Probably while playing Devo in the background.

Another app I want to get around to writing is one
that lets you draw a waveshape and it tells you the
Walsh coeffs. Turns out its an easy thing to do.

--TR


--- Scott Gravenhorst <music.maker at gte.net> wrote:
> 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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> -- Scott Gravenhorst | LegoManiac / Lego Trains /
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