[... and will Yahoo! let me play today - if you're reading this then I have finally twigged what has been 'locking me out' for over a fortnight ('ray, 'ray!) - what a minefield!]

I have 'reverse engineered' the A-126 - if my drawings are complete enough and look 'scannable', and *if* I can get easy access to a scanner, I could probably make them available to others if you like. Its one of the modules I haven't completely sussed yet - from memory it is quite a beast: something like 6 all-pass filters for each of 'downshift' and 'upshift' and a voltage-controlled quadrature oscillator, all feeding somehow into 2 balanced modulators which actually (presumably) give the shift effect. The lower limit of shift (50-60 Hz from memory) is presumably a function of the voltage control range of the oscillator, which thus could probably be lowered, but then how well the multiplication in the balanced modulators works out, who knows...

Tim

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