ni-traktor-kontrol-f1

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ni-traktor-kontrol-f1

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Attempt at reverse engineering Native Instruments' Traktor Kontrol F1 HID messages and building a Linux driver

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# Reverse Engineering Native Instruments Traktor Kontrol F1 HID protocol

This is my first attempt at reverse engineering the communication with a propietary device.
In this case, I'm trying to learn how one needs to talk to a Traktor Kontrol F1.

## The device
The Traktor Kontrol F1 is a DJ controller consisting of some faders, knobs and
a 4x4 launch pad as well as some utility buttons and one endless encoder which
is e.g. used for browsing the files in the Traktor Pro 2 DJ software.

The Traktor Kontrol F1 transports input events via USB-HID.  Furthermore, the
F1 can receive messages to control the RGB color value of the buttons as well
as the value shown on the 7 segment display next to the endless encoder.

## Status of this project

The inputs and outputs of the device have been reverse engineered.
The features are still missing and are probably not gonna be added.

A [Non](https://non.tuxfamily.org)-compatible OSC driver implementation is being developed (see [driver-osc](driver-osc/README.md)).
Support for sending some of the inputs via [JACK](https://jackaudio.org/) MIDI has been implemented.

The current driver implementation has support for dropping privileges (the driver needs to be started as root to access the hidraw device files, but can run as non-root after successfully opening the right device file).

## Main tools used for reverse engineering
  * vim/Okular (Notes taking)
  * usbutils
  * Testing OS: Gentoo Linux

## Useful links
  * https://en.wikipedia.org/wiki/USB_human_interface_device_class
  * https://www.linuxjournal.com/article/8145
  * https://www.usb.org/sites/default/files/hid1_11.pdf
  * https://www.usb.org/sites/default/files/hut1_21.pdf
  * https://www.kernel.org/doc/html/latest/hid/hidraw.html

## License

This repository is licensed under the terms of the GNU General Public License Version 2 or later.
A copy of the GPL can be found in [LICENSE.md](LICENSE.md).

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