Hi Brennan, the expression pedal is a passive circuit, which means it has states: variable resistance (/diodes) in between the T,R and S. So functions could be assigned to states of a volume expression pedal or just have a custom built switch for any of these states. Then it is ‘just’ programming. This improvement would mean that you don’t have to change the circuit only the software to have a foot switch programmed to a parameter. UNDO!! 
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