The DSPx module hardware does not include an ADC to measure  control 
voltage, but it does have some unused digital I/O pins that could read 
buttons, or perhaps an encoder, if you wrote the code to do it.

There is plenty of unused program memory and lots of available DSP 
horsepower for such things.

73,

Lyle KK7P

> I see the KDSP2 module uses open source code.
>
> Would it allow me to sense a couple binary inputs (or even a variable
> voltage) and write some code to vary the filter bandwidth accordingly?

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