CDJ-900NXS · firmware 1.31

Pionaarr Mods

Firmware mods for the Pioneer CDJ-900NXS. We took the player's firmware apart in an emulator and added what newer Pioneer players have: hot cues on the deck, beat jump, colour and 3-band waveforms, keys in Camelot colours and more.

Pick the mods you want in the builder. It patches the official 1.31 update in your browser and gives you a normal C900NXS.UPD to install like any update. The boot loader is never touched, so you can always go back to stock.

Open the builder The mods Docs

Stock CDJ-900NXS screen: blue waveform, red memory cues

Modded screen: 3-band waveform, coloured cues and hot cues, HOT KEYS, key in colour, BPM to two decimals

Stock 1.31 Pionaarr Mods

Same track, same spot, in the emulator. Right: every mod, including the ones still in testing (the 3-band waveform is one of them).

mods in the builder, plus more in testing

A–C

hot cues on the BEAT DIVIDE keys

0 bytes

changed in the boot loader

1 file

built in your browser, nothing uploaded

The mods

Two are by arnoldasr, the rest are Pionaarr mods.

stable experimental

Advanced waveforms

stable

Pionaarr mod · advanced_waveforms

3-band waveform: blue lows, amber mids, white highs — 3-band · in testing, not in the builder yet

rekordbox's RGB colours on the big waveform, a red-to-white overview. 3-band (lows, mids, highs as in rekordbox) comes next, switched in UTILITY › WAVEFORM.

Cue colours

stable

Pionaarr mod · cuecolours

Overview with coloured memory cues and hot cue boxes A to F

Memory cues in their rekordbox colours, hot cues A–H as lettered boxes.

Hot cue keys

experimental

Pionaarr mod · hotcuekeys

QUANTIZE short: the top three BEAT DIVIDE keys become hot cues A–C. Hold an empty key to set one.

Hot cue guide →

Beat jump

experimental

Pionaarr mod · beatjump

TRACK SEARCH ◀◀ ▶▶ jumps 1, 2, 4 or 8 beats, gapless and in phase.

Key notation

experimental

Pionaarr mod · keynotation

Title bar with the key 4A in its wheel colour

Every key in Camelot, Open Key or classic, in its Camelot wheel colour.

Extended BPM

stable

by arnoldasr · extended_bpm

The BPM to two decimals.

Phase meter

stable

by arnoldasr · phasemeter

Two lines instead of four boxes: master and this deck.

LED animation

stable

Pionaarr mod · ledsaver

With the screen saver on, the button LEDs and jog rings play a loop.

Boot text

stable

Pionaarr mod · credit

The boot screen says Pionaarr Mods 1.0.

In testing: cue names, played tracks over Pro DJ Link, the end warning, quick search, USB auto load, a reversed phase meter and the 3-band waveform — see Upcoming.

Build it in your browser

The builder takes the official 1.31 update and adds the mods you tick, on your computer. Only the main application changes; the boot loader and recovery are copied byte for byte and checked.

Open the builder

Prefer the command line? The Python patcher is in the docs.