PieterP:
It works on my Teensy 3.2 without multiplexers. Post your exact code, and post the schematic you're using with the multiplexers.
thanks
I copied exactly your code .. it remained the same, maybe I did not understand it. the schematic in the attach..it only a part of it but this is the way that i use to make the connection
potentiometer-sendreturn-1-1.pdf (66.2 KB)