based on  the code published at
https://github.com/trash80/AbletonTraktorKontrolF1

Additional controls
Keys:
With shift mode you can have:

• mute track - first row
• solo track - 2nd row
• arm track - 3rd row

Sliders:

• on basic mode the sliders control the volume of the tracks and the filter knobs the send A volume.
• on sift mode the filter knobs control the send B vol.
• the step knob on shift mode controls the master volume.