Hello!
I’ve made Traktor Pro Mapping for Denon DJ Prime 4. With a high degree of probability it will also be suitable for Prime 4+

Almost all buttons work the same way as in Engine OS. Some special definitions:

Browser unit

Browser encoder push - open/close Only browser view

Back/Fwd Buttons - Favorite playlists jump back/forward

< Load - load selected track do deck A if deck 1 active or deck С if deck 3 active

Load > - load selected track do deck B if deck 2 active or deck D if deck 4 active

Shift + < Load/Load > - instant doubles A/B

View (hold) - load selected in browser track to preview player and play it

View (hold) + Browser encoder turn - move through track in preview player

Decks

Beatjump - beatjump

Shift + Beatjump - beatjump step size selector

Sync - sync

Shift + Sync - set as Master

< / > (Buttons to the right to Pad Mode buttons) - semitone up/down

Shift + > - assign FX Unit 4 to current deck

Pad Modes

Cue - hot cues

Loop - fixed size loops:

Pad 1 - 1/8

Pad 2 - 1/4

Pad 3 - 1/2

Pad 4 - 1 (color mark)

Pad 5 - 2

Pad 6 - 4 (color mark)

Pad 7 - 8

Pad 8 - 16 (color mark)

Roll - rolls. Hold only

Pad 1 - 1/8 with flux on

Pad 2 - 1/4 with flux on

Pad 3 - 1/2 with flux on

Pad 4 - 1 with flux on

Pad 5-8 - Beatmasher 2 roll from here How to map instant effects in TRAKTOR | Native Instruments Blog

Slicer

When stems track is loaded

Stems control

Pad 1 - Drums Mute On/Off

Pad 2 - Bass Mute On/Off

Pad 3 - Other Mute On/Off

Pad 4 - Vocals Mute On/Off

There is no volume and filter control at the moment. Need knobs or encoders for this. Maybe FX Unit knobs? Will it be acceptable?

When non stem track is loaded

Nothing at this moment. Wait for the ideas

FX Units

Traktor FX Units 1 & 2 full control according to Traktor software interface knobs and buttons locations. For example: Traktor pro’s FX Unit Dry/wet knob is the first. Denon’s FX Unit Dry/wet knob is the last. In my mapping the first Denon’s FX Unit knob is Dry/Wet

ON Button - FX On

FX Select knob - FX Dry/Wet

Shift + ON button - Change FX Unit mode: Single/Group

Shift + FX Select knob - FX Select in Single Mode

Other buttons - as in Traktor

Shift + knobs in Group Mode - Select FX to the corresponding slot

FX Parameter 1/2, Dry/Wet knobs - corresponding slot FX amount

Parameter, Reset, “<” buttons - corresponding slot FX on

“>” button - not mapped

Mixer channel FX buttons - select FX Unit for the channel

Decks A and B - blue jog wheel LED ring

Decks C and D - green jog wheel LED ring

Jog wheels LCD screens and FX units OLED screens not available via midi

Denon DJ AiOs works with computer software like Traktor or Serato only in Computer Mode. You can activate it in the Source menu - tap the computer icon at the top of the display.

To use this mapping you need to import it in Controller Manager settings. I think you will need to check Effect Settings in import settings parameters.

After mapping import check IN and OUT port for all 4 mappings parts. There must be “PRIME 4 Control Surface”

In Output Routing settings choose Out 3 an 4 for Output Monitor. For Output Master there will be many channels. Unfortunately i haven’t had a chance to check their compliance. You’ll have to determine which one you need by yourself.

If there will no Beatmasher 2 FX in Roll mode probably you will need to manualy setup this FX in mapping: Choose Device - Denon Prime 4 VT LEFT PADS. Go to mapping table, sort it by comment column, find Roll Beatmasher Deck A comments. Choose Effect 1 Selector among them and then choose Beatmasher 2 in Set to Value field.

Repeat for deck C in this part. Then go to Device - Denon Prime 4 VT RIGHT PADS and do all for deck B and D

Channel fader in Traktor Pro always up on startup regardless of the position of real faders on the Prime 4. It needed to move each fader a little to make Traktor see real position.

It is alpha version of the mapping. Maybe it will be one and only. But i will try to fix bugs if they will be and add new features.