@denisps2... NHL is just the way Traktor talks to your K1 or KS4.
You just can just set up extra mappings for MIDI, as all the MIDI here (apart from the button to trigger the process which can be triggered from the MIDI page of your device) is just Traktor talking to itself or duino talking to Traktor
More about MIDI:
http://leftandwrite.com/brian/music/...de_to_midi.php
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