[sdiy] Hadamard Transform Network

[Elaine Klopke]

> 
> Paydirt! I found a page with PDFs including the top octave synthesizer and keying matrix for the Helios!
> 
> http://www.batesuk.freeola.com/wersi/manuals/heliosw2.htm
> 
> It was a weird feeling reading those again after *coughsplutter* years!

Oooo! That's a great start! I put out some feelers to the Wersi appreciation Facebook group too. 

-Elain
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