New VCADSR

[tomg]

> Thanks to everyone for their help with my VCADSR circuit.  Tom got me
> thinking about OTAs again so I tried incorporating a 3080 instead of the
> VCO.  This one is certainly much improved over the VCO based design.
> 
> http://www.evenfall.com/diy/vcadsr3.gif
> 
> Fastest attack time is 0.15 milliseconds, longest attack time is around
> one minute thirty seconds.
> 
> Comments, improvements, bug fixes, etc. are welcome!
> 
> -Chris MacDonald

Yes, this is much better. Very nice Chris.

-tg