A Max/MSP patch to use Traktor Pro software with a DualShock 4 Controller (or any other if you modify it accordingly). Should also work with a DualShock 5, although I've never tested it.
The whole system works by dividing the controls into 4 different banks, which can be accessed through holding the shoulder buttons.
I recommend using the Traktor Mixer interface, where software mixing and crossfading is possible. Don't forget to backup your Traktor profile and load my xbox.tsi profile! If you would like to edit the profile I'd recommend the awesome cmdr app: https://cmdr-editor.github.io/cmdr/
nothing - Control Deck A
hold R1 - Control Deck B
hold L1 - Browser
hold both - Mixer
Left and Right sticks are used like an old iPod clickwheel, where you rotate it in a circle to go up and down.
Button X - Play
Button O - Set Loop
Button Triangle - Set as BPM Master
Button Square - Set as BPM Sync
Dpad Left - Beat Jump
Dpad Right - Beat Jump
Trigger Left (L2) - Loop Size Change
Trigger Right (R2) - Loop Size Change
Left Stick - Move through the track
Right Stick - Move the loop
Touchpad is divided into three equal parts for three Hotcue buttons:
[ Hotcue 1 | Hotcue 2 | Hotcue 3 ]
Right Stick - Move through the collection
Dpad Up & Down - Precise control
Dpad Left - Load track to left deck
Dpad Right - Load track to right deck
Dpad Down - Sync the current crossfade value to the Right Stick
Right Stick - Crossfade by moving the stick left or right
Dpad Down (again) - Lock the position of crossfade