Thanks for your answer, i really want to use existing knobs and faders as MIDI controller. But my question is: is it possible to use my analog mixer in the same time ? EX: the fifth channel to control Ableton and the others to control analog input... Because if i want to add MIDI module to existing knobs, i must insert volts on the knobs, you see ? thx ! and sorry for my poor english but there is no activity on french forum :-[