[sdiy] more questions about Walsh functions and generators

[Happy Harry]

Someone on the list has a neat JAVA applet that lets you
"see" the effects of varying the Walsh coefficients...
(fess up... who has it!)

You should all TRY this to see how counter-intuitive Walsh
drawbars would be.

The Hammond is a harmonic series... so its very easy to get the
hang of adding tones... more bars out = brighter.

The Walsh functions will fade in and out as certain parts of each
function cancel others out...

Now what would be interesting would be to have some intelligence
to the drawbars to synthesize some intuitive wave shaping...

H^) harry


>From: Peter M Blackett <dragonservicing at success4business.com>
>To: synth Diy list <synth-diy at dropmix.xs4all.nl>
>Subject: [sdiy] more questions about Walsh functions and generators
>Date: Tue, 02 Apr 2002 23:36:10 +0100
>
>Hi,
>Ive just got some more questions about the Walsh functions and
>generators .
>I know from using the well known system of Drawbars that its possible to
>quickly adjust the type of waveform and sound that you are looking for .
>I think when this system is used on the Hammond Organs there are 9
>drawbars at fixed pitches and each can be set from 0 to 8 .
>Would you need to have more drawbars when using Walsh functions ? and
>would the frequencies of each drawbar be fixed ?
>I guess the answer to my next question is that I need to make up a unit
>to find out , but how intuitive is it using the drawbars or faders with
>the Walsh functions ?
>I'm not worried about recreating standard waveforms ,but how controlable
>is the sound ? just wanted people's opinions who have used Walsh
>generators.
>I see I have got a lot to learn about this .
>the first mention of Walsh functions that I can remember was in
>Electronics and Wireless world magazine many years ago .
>looking forward to finding out more about the Walsh cpld .
>
>regards Peter
>
>




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