Thanks for the answer, mr. Reeves.
I saw that binary offset encoders works better for this controller. Unfortunately linear encoders works the same. Anyway, I think that a python script will solve this situation.
I already did something nice with python for this controller, but I didn't programmed any knob so far. The matrix triggers are now assigned automatically in Ableton and I can scroll the 8x4 box (or 4x8 if the LC-1 is rotated) up/down/left or right. I also programmed the Rec/Solo/Mute buttons. No LED feedback so far (still studying the python scripting ).
The Traktor mapping is almost done. I did a generic 2 decks mapping which will give me the full control of Traktor. Works awesome !
I'll do a video example of a live act soon.