They are "force-sensing resistors" which are sold in a variety of
configurations these days. I'll have to find out if any are suitable as
aftertouch sensors.
Crow
/∗∗/
On Fri, 1 Oct 2004, David Rogoff wrote:
> What is in the CS-80's sensors? I know it's a rubber cushion and,
> according to the schematics, electronically it acts like a
> potentiometer, outputing a voltage proportional to the pressure, but I
> don't know what's going on inside it. Are there (widely, cheaply)
> available force sensors that could be used to add pressure sensing to
> an existing keyboard (if you could figure out where to mount them)?
>
> David