I am working on a Midi controller but have some questions about taking the best approach to utilizing potentiometers as input devices. First is if I use the onboard A to D converters on the teensy 3.5 my AREF can only be as high as 3.3 vdc if using an external reference. So this would give me a resolution of about .8 millivolts for a 12 bit conversion. I was considering using an external AREF of 2.048 vdc which would give me approximately .5 millivolts resolution for 12 bit conversion. Considering that I could only supply the potentiometers with no more then 2.048 vdc I would suspect that the measurements would be more susceptible to noise by using such a low AREF. I would need to supply the potentiometers with a fairly noise free voltage source to prevent so called jitter in my readings. Putting a capacitor on the input of an A/D converter is not an ideal fix to remedy noise. Hardware filtering would be much better I would believe and also provide a proper input impedance to the A/D converters if used as a unity gain buffer also. But now I am thinking that maybe utilizing an off board 12 bit A/D converter would be a better approach since I can increase the A/D voltage reference to 4.095 vdc and use a higher supply to the potentiometers possibly not measuring as much noise if it exists. I am stuck on what would be the best way to accomplish. Stay with in onboard teensy A/D converter or use an offboard converter. Using an external converter would mean much more coding but maybe not have a much noise showing up in the lower bits of the conversion. Any advice or opinions on this is appreciated. Thanks.