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If anyone had a problem where if you had two potentiometers in analog inputs A1 and A2 set to control two different parameters (say Gain and HI EQ) twisting eiter potetiometer would control both parameters! in fact any potentiometer in any port would cross over and and effect any assigned value. for my Card (Mega 2560 clone) i had to change the analog pinmode from INPUT to INPUT_PULLUP(in the code under where it says :// Set the pin direction to input.)hope it helps anyone