Didn’t they announce that they were adding MIDI to the remix deck in a later release? I remember seeing something about it supporting everything but color sending.
Most of my experience in Max with HID is receiving and sending USB HID messages to an actual device. Controlling the Traktor RemixDeck with Max would require Max to identify itself as a USB HID device itself, specifically the F1 deck. Something I have not yet seen accomplished, but would certainly love to. Might anyone else provide some more insight?