LNNRT
LNNRT Mods

CDJ-2000NXS2 firmware mods

Only for the Pioneer CDJ-2000NXS2 with firmware 1.87. Other players and firmware versions are not supported and are refused by the patcher.

UTILITY → SEARCH set to 32 BEATS

Search Beat Jumpv1.1.0Stable

SEARCH or TRACK SEARCH buttons as beat jumps (1–32 beats).

Latest update ·

UTILITY → BEAT JUMP BUTTONS: SEARCH (default, as before) / TRACK SEARCH, saved. The other pair stays stock.

Changelog & details for Search Beat Jump
UTILITY menu with GATE CUE, KEY SHIFT and OVERVIEW WAVEFORM TYPE rows

Gate Cuev1.0.0Stable

Hold a Hot Cue while paused to preview it, CDJ-3000X style.

Latest update ·

First 1.0.0 release of LNNRT Mods.

Changelog & details for Gate Cue
Key Shift panel open on the player screen

Key Shiftv1.1.0Stable

Change the key in semitones from the touch screen.

Latest update ·

No dropout or click when a shift starts from 0 or returns to it; 0 keeps the processed path (same latency) once a shift has been used.

Changelog & details for Key Shift
Before and after: the stock grey glow behind the 3-band waveform (top), and the black background with No Waveform Glow (bottom)

No Waveform Glowv1.0.1Stable

Black background behind the scrolling waveform, no grey or blue band.

Latest update ·

Tested on a deck: marked stable. The firmware is identical to 1.0.0.

Changelog & details for No Waveform Glow
3-band detail waveform with the half overview waveform

3-Band Waveformv1.1.1Stable

CDJ-3000-style 3-band waveforms, half or full overview.

Latest update ·

Tested on a deck: marked stable. The firmware is identical to 1.1.0.

Changelog & details for 3-Band Waveform
Beat numbers 4 8 16 32 under the waveform with the CDJ-3000-style playhead on the left

Beat Numbersv1.0.0Beta

CDJ-3000-style beat counts under the waveform, playhead on the left.

Latest update ·

First release (beta, emulator-tested): beat counts 4 / 8 / 16 / 32 (64 / 128 zoomed out) under the detail waveform, measured from the playhead, at every zoom level.

Changelog & details for Beat Numbers
Deck 2 in focus: "2 | Absorb (Extended Mix)", PLAYER 2, its own waveform and tempo

Dual Deckv0.1.0ExperimentalNew baseLocked

A second deck on the DIGITAL OUT, switched with the PLAYER box.

Latest update ·

First release (experimental, emulator-tested): deck 2 on the DIGITAL OUT with its own transport, controls, waveforms, title bar, PLAYER number, LEDs, MASTER TEMPO, SYNC, MASTER and rekordbox hot cues; WAV/AIFF, MP3 and AAC.

Changelog & details for Dual Deck
Preview

In development

Not released yet and not in the patcher. Plans can change.

  • 32 and 64 Beat Jump

    Swaps the 1 and 2 beat jumps in the beat jump menu for 32 and 64 beat jumps.

    Status: In development (step 2 of 3 before release)

  • Stacked Waveform

    A stacked waveform at the top of the screen, to help with beatmatching.

    Status: Investigating (step 1 of 3 before release)

Install guide

LNNRT Mods work only on the Pioneer CDJ-2000NXS2 with firmware v1.87.

  1. Download the official stock firmware v1.87 for the CDJ-2000NXS2 from the AlphaTheta / Pioneer DJ support site and unzip it to get C2KNXS2.UPD.
  2. In the Patcher tab, tick the mods you want and choose the options.
  3. Drop your stock C2KNXS2.UPD on the file box. It is verified by checksum — only the exact official file can be patched.
  4. Build the patched update and unzip the result. Check manifest.json for the patch versions and the output SHA-256.
  5. Format a USB stick (FAT32), copy the patched C2KNXS2.UPD to its root, and follow the official firmware update procedure for the player (USB source with the update file, hold the requested buttons at power-on as described in AlphaTheta's firmware update guide).
  6. Every LNNRT Mods build installs over any other one, so you can switch builds (or install the same file again) the same way.

Safety & recovery

  • Use at your own risk. Firmware modification can brick a player. Never interrupt power or remove USB during an update.
  • To return to stock, build the stock firmware restore on the Patcher tab and install it like any update. Pioneer's own file cannot do this: every LNNRT Mods build reports version 1.87, and the player skips an update that is not newer than what it runs.
  • The restore is Pioneer's 1.87 file with only its two version headers raised (10 bytes differ, checksums included), so the player accepts it. It then runs stock 1.87 again and reports 1.87. Later official updates install as on any stock player.
  • Settings the mods saved (SEARCH, OVERVIEW WAVEFORM TYPE, KEY SHIFT) stay in the player's memory, but stock firmware ignores them. They come back if you install a mod build again.
  • Mods are built for stock v1.87 only. Patching any other file is refused on purpose.
  • Modded firmware may behave differently in modes not covered by the changelog — read the patch details.

Verification & privacy

  • Patching runs entirely in your browser (WebAssembly-free JavaScript). Your firmware file is never uploaded anywhere.
  • Every patch release publishes the expected output SHA-256. After building, compare your manifest.json output hash with the published value to confirm your build matches the reference release bit-for-bit.
  • The patch data is served by this site (release/), so anyone can inspect it. It contains only our own code and patch bytes, never Pioneer firmware.