hi @xtreemechill
I'm no expert but a few points just from my experience with pots and audio effects:
- are you using the audioboard as part of your design, if so remember that will take out a few analogue pins
- same for the DACs if you are planning on using them
- is this a one off, if it is and you are ok soldering onto the bottom of the Teensy there are a few extra analogue pins
- what accuracy are you aiming for - I've never needed and external reference board but you may need more accuracy that I've needed
- I've used 10 pots directly onto the teensy (no ref voltage, no multiplexer) with no problems at the same time as running effects and lights etc. 10 wasn't a limit it was just all I needed
cheers, Paul