[sdiy] 4069 VCO again

[jbv]

Hi,

I have a couple more questions about the 4069 VCO
described here :
http://www.uni-bonn.de/~uzs159/vco4069.html

- I didn't found anything about stability & calibration...
any clue ?

- I was wondering how this little thing would behave
in a polyphonic context (several such VCOs in parallel)...
any risk to see them lock together ? decoupling issues ?

- how to modify it to accept 1V/oct VC from a uC + DAC
+ SH expo converter ? I guess it'll make the circuit even
simpler...

Thanks,
JB