Can it be set up for expression control over filter sweeps so I could manually sweep the filter?
>>That will be the default expression control mode for the Spectrum Filter pedal version of the C4. You could also set this up the C4 Synth pedal too.
Would this work with a standard expression pedal or would I need to try and find a Reflex?
>>>All of our One Series allow for a 3rd party expression pedal to be used. We even support calibration to match the pedal to the right range.
Would the reflex be overkill given the modulation abilities already available within the C4?
>>Probably
I already have an analog filter, would it be a waste of the C4's capabilities to just use it as an oscillator module and run it through my filter? Would it be better to sell the analog filter? I an definitely considering selling my analog octave and POG and replacing them with the C4.
>>The C4 can cop a crazy long list of sounds. Can it match exactly what you have and/or want? Time will tell!