[sdiy] Walsh Generators

[Scott Gravenhorst]

I haven't followed this thread closely, so pardon me if this information is
repeat.

http://home.comcast.net/~t.ressel/walsh.html is Tim Ressel's site Walsh
page, on this page, he announces that he developed a CPLD which cranks out
"the first" 31 Walsh functions from a single square wave input.  I would
imagine that 31 VCAs would be needed to control the amplitudes
programmatically.  If the price ($20.00) stated is still valid and if he
has them for sale, this could be a way to go to make a Walsh synth in hardware.

I'm only guessing here, but I would think that 31 Walsh functions would be
similar in resolution to a 31 bit DAC.  Those who know: please educate
me/us if that is not true.

Glen <mclilith at charter.net> wrote:
>So, can anyone give me a rough idea of how much circuitry (and what type/s
>of circuitry) would be required to generate audio with quality equivalent
>to 16-bit or 24-bit PCM audio, using a Walsh synthesizer? Would it require
>some custom digital chips to be practical? Is it even practical at all?
>
>thanks,
>Glen
>

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