[sdiy] AvrWalsh??

[Tim Ressel]

Ah, someone with stick time. Thanks, Tony!

This is pretty much what I had in mind. I like the
idea of start and end settings and interpolating
between them. It wasn't clear to me if the the
in-between sounds were going to be useful. With a
processor, one could use a single set of knobs, and
use a 'start' and 'end' button to write the conditions
into the box. A more involved senario would be to use
multi-segment envelope generators. But harder to
program. Probably would need a PC to do it. Your
notion is much less involved. 

I'm thinking this could be a module with either a
trigger in and internal ramp gen to do the slewing, or
make the slewing voltage controlled. How about an LFO
slowly moving it between two waveforms? Weee!

-- Tim (too many projects) Ressel

--- Oakley Sound <tonyallgood at btinternet.com> wrote:

> Now since I have a hardware walsh synth I ought to
> mention a few things:
> 
> 1. The Walsh generating bit is fairly easy. Even in
> 74 logic the whole 
> thing is rather compact. Its the multipliers that
> take up the 
> room/wiring/building. One should allow for negative
> and positive 
> coefficients too. Its still only one analogue switch
> and an op-amp, but 
> 31 of them takes some building.
> 
> 2. The interface is tricky. So how do get an
> intuitive interface with say 
> 31 sliders/pots that can actually create tones
> simply and easily.
> 
> I thought about having two sets of 31 sliders, with
> one set determining 
> the start waveform and the other determining the end
> waveform. A 
> traditional ADSR would control sweep between the
> two. The peak of the 
> attack waveform, or 100% of the sustain level, being
> the end point.
> 
> Interpolation between the two would be
> straightforward linear... which 
> would lead to all sorts of things being created as
> coefficients move to 
> their new values.
> 
> In the end my project stayed on the workbench and
> never made it into the 
> studio.
> 
> Surely this is an ideal project for software. Maybe
> even a quick 
> synthedit jobby.
> 
> Tony 
> 
> 


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