Engine DJ is inMusic's DJ platform: Engine DJ OS runs the standalone players and controllers from Denon DJ, Numark and Rane, and the free Engine DJ Desktop app prepares your music for them on a computer. It replaced Engine Prime in 2021, and version 5.0, released in May 2026, added stems rendering on the Rane SYSTEM ONE, RGB waveforms and track star ratings.
What Engine DJ is
Engine DJ has two parts that share one library.
Engine DJ OS is the software built into the hardware. It plays from USB drives and SD cards, and from an internal drive on units that have a bay; streams over Wi-Fi; and analyses tracks for BPM, key and beatgrid on the unit, so a computer is optional. It also has a touchscreen browser, an eight-slot sampler, Touch FX and Engine Lighting, which syncs DMX, Nanoleaf and Philips Hue lights to the music.
Engine DJ Desktop, for Mac and Windows, is where you prepare that library: playlists, smartlists, beatgrids, hot cues, loops and up to eight active loops per track. It imports rekordbox, Apple Music and iTunes, Serato DJ and Traktor libraries with their playlists, hot cues and loops, then its Sync Manager exports everything to a drive or to Dropbox.
Denon DJ's desktop software was called Engine Prime until version 2.0 in October 2021, when the platform dropped the Prime name and became Engine DJ Desktop and Engine DJ OS, Crossfader reported. Anything you read about "Engine Prime 1.6" describes software that is five years out of date.
Which hardware runs it
Engine DJ's hardware page lists:
- Denon DJ standalone systems: PRIME 4 G2, PRIME 4+, PRIME 4, PRIME 2, PRIME GO+, PRIME GO, and the SC LIVE 4 and SC LIVE 2.
- Denon DJ media players: SC6000 PRIME, SC6000M PRIME, SC5000 PRIME and SC5000M PRIME, plus the LC6000 PRIME controller.
- Numark: Mixstream Pro, Mixstream Pro+ and Mixstream Pro Go.
- Rane: SYSTEM ONE, the first Rane unit with Engine DJ built in and, Rane says, the first standalone with motorised platters, launched in January 2026.
The best standalone DJ controllers guide compares these with the rekordbox-based standalones from AlphaTheta.
What's free and what isn't
- The software. Engine DJ Desktop and Engine DJ OS updates are free downloads, and the hardware downloads its own updates over Wi-Fi or a wired connection.
- Stems. Engine DJ Desktop renders four-part stems (vocals, melody, bass and drums) for any track, and the PRIME 4+ plays them free. Other Denon DJ and Numark standalones need a one-time Stems unlock licence, per Engine DJ. The SYSTEM ONE and PRIME 4 G2 can also render stems on the unit, without a computer.
- Streaming. Each service needs its own subscription.
Streaming and other sources
Engine DJ's streaming page lists Apple Music, Amazon Music Unlimited, Beatport, SoundCloud and TIDAL, plus Dropbox for your own files. Apple Music and Amazon Music Unlimited work on the PRIME 4+, PRIME GO+, SC LIVE 4, SC LIVE 2, Mixstream Pro+ and Mixstream Pro Go, and both are listed for the SYSTEM ONE and PRIME 4 G2. The page still lists Beatsource, but Beatsource has since folded into Beatport.
Beatport Streaming on Engine DJ hardware needs Beatport's Advanced plan or higher. Beatport says Engine DJ OS supports its lossless FLAC streams but not its offline library, so a Beatport set on Engine hardware needs an internet connection. The DJ pools guide compares streaming with download pools.
The SYSTEM ONE and PRIME 4 G2 add OmniSource, which mixes music on drives and streaming services with tracks played from DJ software on a laptop, phone or tablet. Rane announced Serato DJ and Algoriddim djay as sources for the SYSTEM ONE, and djay arrived in September 2026. Denon DJ says the G2 will support Serato DJ Pro, djay and VirtualDJ, with software support "coming soon".
What changed recently
- Engine DJ 4.2, November 2024. Stems arrived, rendered in Engine DJ Desktop and played back on the hardware.
- Engine DJ 5.0, May 2026. On-board stems rendering for the SYSTEM ONE, RGB waveforms as an option on all hardware and on Desktop, star ratings set on the hardware, 32-beat Reverb Rise and Drop effects, a new source screen, and a demo library of tracks already split into stems. Desktop 5.0 added an Import Assistant that walks through moving a Serato, Apple Music, rekordbox or Traktor library.
- PRIME 4 G2, September 2026. Denon DJ's new four-deck system renders stems on the unit and has a DMX lighting output built in.
- Current versions. Per Engine DJ's downloads page, Desktop is on 5.1.0, released on 1 September 2026, and most hardware runs OS 5.0.4; the PRIME 4 G2 and SYSTEM ONE have newer builds of their own.
- Ownership. inMusic, which owns Engine DJ, Denon DJ, Numark and Rane, agreed in May 2026 to buy Native Instruments, the maker of Traktor.
Engine DJ or rekordbox
Club CDJs from Pioneer DJ and AlphaTheta read libraries exported from rekordbox, not Engine DJ. Engine DJ Desktop can import a rekordbox library, but the drives it prepares are for Engine DJ hardware, so check what the booths you play in use. The SC6000 vs CDJ-3000 comparison covers the players, and the best DJ software guide covers the laptop options.
