[sdiy] New and Improved Buchla waveshaper analysis

[Grant Richter]

>
> Here's my new rendition of the nonlinearity from the timbre  
> circuity of the Buchla 259 Programmable Complex Waveform Generator:
>
> http://users.ece.gatech.edu/~lanterma/buchla_nonlinearity.png
>

With all due respect, any thing using a diode will never give a  
transition that sharp. And anything using a real op-amp with
finite output impedance will never give a transition that sharp.