[sdiy] Walsh bank, was: Re: [sdiy] Micro as a Linear to Exponential converter?

[cheater cheater]

So what's a Walsh bank and how do you eat it? =)
D.

On Fri, Aug 14, 2009 at 11:03 PM, Neil
Johnson<neil.johnson97 at ntlworld.com> wrote:
> Hi,
>
> Colin f wrote:
>>>
>>> Yes, did this way back in 1996 for my MSc project (the report with
>>> full source code is still online). Since you only need one octave's
>>> worth of values you can increase the resolution and still fit into a
>>> reasonable space.  IIRC I chose 32 steps per semitone.
>>
>> And what did you do with those steps ? Interpolate for pitch-bend ?
>> That might save me some soldering.
>
> Actually, no interpolation - in this project the tables contained 24-bit
> values used to control a 24-bit frequency divider (6 of 74LS161) to drive a
> Walsh bank.  I did also drive an 8-bit DAC to give a key-follow CV, but this
> was not intended to be precision, just another input to the Walsh terms.
>
> Cheers,
> Neil
> --
> http://www.njohnson.co.uk
>
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>