Ok, forget my last post, i just found the 4051 article in the playground ;D As i understand you can loop thru the multiplexer channels. But here we have the next question: How fast can arduino do this? Fast enough to have the feeling that there is no delay when you change the value of a fader/knob? Another question: what kind of fader/potentiometer will i have to use? 100kOhm?