[sdiy] Keyswitches

[Paul Perry]

   > I was wondering if anyone had or knew of a circuit that made use
   > of ONE set of switches to generate both, the C.V. and trigger
   > signal.

I imagine one could differentiate the CV & get a spike when it changes.
But you would have to detect when the switch went off, for the 'note off'.

Which you could do, if the keys were supplying a fixed current to 
various distances along a resistor chain, & you looked at current flow.

paul perry Melb AUst