[sdiy] AvrWalsh??

[Oakley Sound]

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