I hope not because you have shorted all the sensors together
Your absolutely right! God I have a long way to go yet.
Not only does it minimise cross talk it also limits the voltage into the multiplexer to a safe level.
When ever you get high impedance inputs being coupled together inductively ( due to close proximity ) the transformer effect will induce voltages in the other lines. This is cross talk.
Everything else I understand now.
Thinking about your previous observations with the reading of a floating input.
Didn't quite follow this entire paragraph, but I can't wait to read up what was covered. I actually discovered the problem by fluke before reading this. But your dead right, it was the mains. Turns out my charger has really started to let that 50Hz sing throughout the computer... This explains not only the patterns, but the constant inconsistencies and difficulty in locating the problem fact that when I'm at the computer its not as apparent, as my hands are grounding the signal. Shame cuz my mac only lasts 10 minutes without me. Time for a new computer I guess (The charger was replaced last year because of the same problem). With this last issue solved, hopefully I can progress at a faster rate.
Many thanks to all that helped.