Two decks
Waveforms, tempo, vinyl and scratch, Hot Cues, loops, Beat Jump, Sync and Master Tempo.
Production release · 2026-09-20
Standalone DJ system
Two decks.
No laptop.
Pajoniiir M2 turns the Pioneer DDJ-FLX4 into a complete standalone performance system. Browse Rekordbox media, mix two decks, monitor CUE and play MAIN audio — all from one ESP32-P4.
Built, signed, installed and physically smoke-tested on the qualified M2 release line.
Real M2 hardware · dual-deck Overview
StandaloneNo computer on stage
MP3 / WAV / FLACFrom Rekordbox USB media
4.3-inch touchBrowse, load and perform
MAIN + CUEIndependent audio paths
Open sourceMIT-licensed firmware
The hardware
A real instrument
for real sets.
Pajoniiir is a compact, self-contained player designed to live beside the FLX4. The enclosure brings touchscreen control, USB media and RCA MAIN connections into one purpose-built device.
Made for the booth
Small footprint.
Complete signal path.
- USB0 Rekordbox media
- USB1 Pioneer DDJ-FLX4
- PCM5102A stereo RCA MAIN
- FLX4 headphone CUE
Live performance
See it in action.
Real hardware. Real mix.
Watch the standalone dual-deck workflow in real-time — Rekordbox USB library navigation, instant track loading, responsive waveforms and tactile FLX4 mixing with zero laptop latency.
Live M2 smoke test & dual-deck performance · Pioneer DDJ-FLX4 · ESP32-P4
One chip. Full control.
One P4 owns
the whole set.
M2 uses a single source of truth. One ESP32-P4 runs both decks, the mixer, USB, controller state, touchscreen, Wi-Fi service and signed updates.
Direct dual-USB hostStorage on USB0; FLX4 MIDI, LEDs and four-channel audio on USB1.
Real-time audio engineTwo decks, Master Tempo, EQ, filter, Pad FX and Beat FX remain P4-owned.
Resilient lifecycleReconnect recovery, controller LED resynchronization and signed dual-slot OTA.
Signal flow
USB0Rekordbox media
MP3 · WAV · FLAC
MP3 · WAV · FLAC
ESP32-P4Playback · DSP · mixer
UI · Wi-Fi · OTA
UI · Wi-Fi · OTA
USB1FLX4 MIDI + LEDs
4-channel USB audio
4-channel USB audio
MAIN → PCM5102A RCA
CUE → FLX4 headphones
On-device interface
Built for the mix.
A clear 800 × 480 interface keeps the essential state visible and the main actions close. Use the tabs below to inspect real captures from the current firmware.
Dual-deck OverviewLarge waveforms, transport state, titles, timing, BPM, pitch, Master Tempo and Beat FX remain visible during performance.
Performance system
Everything a set needs.
On the device.
The FLX4 remains the deeply integrated performance surface, while the P4 keeps the audio, timing, UI and physical feedback coherent.
Mix + effects
Three-band EQ, channel faders, crossfader, filter, Pad FX, Echo, Flanger and Delay.
Independent audio
PCM5102A RCA MAIN output and simultaneous FLX4 headphone cue over USB Audio.
Release-safe
Signed local and remote OTA, dual-slot validation, rollback and an accessible wired recovery path.
Production release
Tested. Signed.
Ready.
M2 freezes verified production images built with ESP-IDF 6.0.2, signed, installed by OTA, physically smoke-tested on real hardware and published with verified artifacts.
Exact-image verificationM2 series · signed & installed on ota_1
Real media acceptanceMP3, WAV and FLAC playback with audible MAIN and CUE checks
Combined hardware soak180.156 minutes on the qualified M2 release line with zero strict fault delta
Public signed releaseGitHub assets and OTA channel independently downloaded and hash-verified
Open source
More music.
Open source.
Explore the firmware, hardware guidance and reproducible release evidence behind a standalone DJ system built with ESP-IDF.