SonodexFree
0 €permanent · no account
Import, check new tracks, sync and create USB sticks.
- Library, search and player
- Import from all supported DJ programs
- Incoming check for new files
- Sync with five DJ programs and Pioneer USB
- Backups by hand
New in 4.9New energy rating
Prepare once. Play anywhere.
Sonodex is the DJ library app for Windows: take over your library from any DJ software, check new tracks, analyse BPM, beatgrid, key and energy precisely, set cues and build sets with ChatGPT or Claude. Then everything goes back to Rekordbox, Serato, Engine DJ, Traktor, VirtualDJ or onto the USB stick for Pioneer players.
- Usable without an account
- Music stays local
- No subscription
Sonodex at a glance
- 5 DJ software
- Rekordbox, Serato, Engine DJ, Traktor and VirtualDJ, plus USB sticks for Pioneer players.
- 16 Hot cues per track
- Plus memory cues, loops, a beatgrid editor and a cue generator.
- 0€ for Free
- Import, incoming check, sync and Pioneer USB without an account.
- 29€ one-time for Pro
- Founder price for the first 500 licences. No subscription, Free costs nothing.
How it works
From import to gig. In four steps.
Import, check, analyse, sync. At every step, you decide what gets applied.
- 01 of 4
Import Your collection. From any software.
Bring in folders, purchases and complete libraries from Rekordbox, Serato, Engine DJ, Traktor, VirtualDJ or Lexicon. Playlists, cues and tags come along.
- 5 DJ programs
- Playlists
- Cues & tags
- 02 of 4
Check Find errors before they find you.
Every new file is fully decoded and checked for overload, clipping, silence and decoder errors. What passes, you import with one click.
- Incoming
- Error check
- One click
- 03 of 4
Analyse & prepare Know every track.
BPM, beatgrid, key, energy and loudness, up to six tracks at once, plus cues from the cue generator and clean tags with Quick Fixes. Every suggestion goes through a preview first, then it is applied.
- 99.6% BPM exact
- Key & energy
- Cues
- 04 of 4
Sync & USB Ready for any setup.
Back to Rekordbox, Serato, Engine DJ, Traktor and VirtualDJ, or straight onto the USB stick for Pioneer players. Every change shown in a preview first.
- Preview
- 5 programs
- USB
FunctionsEverything for your prep.
Everything for your prep.
In one app.
Eight areas that take you from your first import to a finished USB stick.
Import & Library
Take over any library, everything in one place.
Learn moreIncoming check
Spot faulty files before they play in the club.
Learn moreAnalysis
BPM, beatgrid, key, energy and loudness, local and fast.
Learn moreCues & beatgrids
Cue generator, hotcues, loops, beatgrid editor and audio editor.
Learn moreTidy up
Clean tags, batch changes and matching.
Learn moreLibrary check
Duplicates, missing files, history.
Learn moreSync & USB
Five DJ programs and Pioneer USB, with preview.
Learn moreKI-Assistenten
Build sets, set cues and fix grids with ChatGPT or Claude.
Learn moreMesswerte
Precise analysis. Backed by numbers.
Measured against purchased Beatport tracks and a human-annotated EDM test set, each with the dataset behind it.
- 99,6% BPM exact
- purchased Beatport tracks
- 97,4% First beat accurate to 10 ms
- purchased Beatport tracks
- 97% Tempo accurate to ±4%
- Raveform, EDM test set annotated by humans
- 93% Key matches the majority of three established key tools
- purchased tracks; 96%, where all three agree
Fast, too: “Automatic” analyses up to six tracks at once. On a PC with 16 threads, throughput rose from 16.1 to 31.2 tracks per minute, almost double.
Pro · AI assistants
Say which set you need. You decide what stays.
Connect ChatGPT, Claude or another AI assistant to your library via MCP. The assistant builds sets from your own tracks, suggests cues and corrects beatgrids. Every change is a suggestion: you review it in Sonodex, apply it and can undo it at any time.
More about the AI assistantsWhat the assistant does for you
- Have sets built from your own tracks
- Have cues suggested and beatgrids corrected
- Nothing in Sonodex changes without your confirmation
- Undo every applied change in a single step
- With ChatGPT, Claude and other MCP assistants
Prepare safely
You stay in control.
Sonodex makes suggestions and shows you every change. Nothing is written until you say so.
Preview before every sync
You see every change before Sonodex writes to your DJ software or to the USB stick.
Nothing without your confirmation
You only accept suggestions from the cue generator, Quick Fixes and AI assistants after taking a look at them.
History with Undo
Every change to the library appears in History with before and after, and can be undone.
Your music stays with you
Library and Analysis run locally. For Free you don’t even need an account.
Vergleich
Sonodex prepares. Your DJ software plays.
More than a converter: check, analyse, clean up and write back to five DJ programs, in one app and with no subscription.
Compared with 4 other programs
| Feature | Sonodex | Rekordbox | Serato DJ Pro | Lexicon | Mixed In Key |
|---|---|---|---|---|---|
| Manage your library: playlists, smartlists, tags | Ja | Ja | Partial | Ja | Partial |
| Read libraries from other DJ programs | Ja | iTunes/XML only | k. A. | Ja | No |
| Write libraries of other DJ software | Ja | No | No | Ja | Tags only |
| Check new files for errors and clipping | Ja | k. A. | k. A. | Faulty files only | No |
| Create Pioneer USB sticks | Ja | Ja | No | Ja | No |
| Import analyses from Mixed In Key | Ja | Via tags | Via tags | Partial | – |
| Match streaming playlists against your own files | Ja | k. A. | k. A. | Ja | No |
| Work with ChatGPT or Claude (MCP) | Ja | k. A. | k. A. | Own chatbot | No |
| Preismodell | Free, Pro one-time €29 (founder price) | Free + subscription | Purchase or subscription | Free, subscription or lifetime | Kauf |
As of 9 Nov 2026 (Sonodex 4.9.5). Lexicon 1.11 and Mixed In Key 11 Pro according to the vendors' information and our own check of 24 Oct 2026, Lexicon's pricing model according to its pricing page of 6 Nov 2026; Rekordbox 7 and Serato DJ Pro according to vendor pages and trade press of 1 Nov 2026. Sonodex writes Rekordbox, Serato, Engine DJ, Traktor and VirtualDJ as well as Pioneer USB sticks (WAV, AIFF, FLAC, ALAC, MP3 with constant bitrate). Streaming matching via the Track Matcher: Spotify own playlists, YouTube and SoundCloud titles, Beatport charts; nothing is downloaded. “n/a” means: not checked, “–”: not part of the product, “Partial”: limited. “Via tags”: the program reads what Mixed In Key writes into the files. Pricing models of the others are given without amounts because vendors often change them; Sonodex Pro costs a one-time €29 at the founder price for the first 500 licences, then €49. Rekordbox, Serato, Lexicon and Mixed In Key are trademarks of their respective owners.
Founder price
Pro one-time €29. Later €49.
The founder price applies to the first 500 licences. No subscription, and Free stays free.
Pro Founder price
29 €one-time · taxes included where applicable · no subscription
For the first 500 licences. After that, €49.
Analysis, cue generator, clean-up and your AI assistants.
- Everything in Free
- AI assistants: ChatGPT, Claude and more
- Analysis: BPM, beatgrid, key, loudness
- Cue generator, cues, loops and beatgrid editor
- Quick Fixes, Recipes and Track Matcher
- Library check and finding duplicates
Until online purchase is enabled, the Sonodex team unlocks Pro for you.
Frequently asked questions
Good to know
Questions about your account, password or error reports are answered by the Help.
What is Sonodex?
Sonodex is the DJ library for Windows. You import your library from any common DJ program, check new tracks, analyse BPM, beatgrid, key and energy, set cues, tidy up tags, let ChatGPT or Claude build sets and write everything back to your DJ program or to a USB stick for Pioneer players.
Does Sonodex replace my DJ software?
No, it complements it. Sonodex prepares, Rekordbox, Serato, Engine DJ, Traktor or VirtualDJ play. You work in one place and have the result in every program.
Does it work with my DJ software?
Rekordbox, Serato, Engine DJ, Traktor and VirtualDJ are sources and targets, plus USB sticks for Pioneer players. We have tested the direct sync with Rekordbox against the latest Rekordbox version. djay Pro, Apple Music (iTunes XML) and Mixed In Key can be imported. What exactly is read and written is listed under Integrations.
How accurate is the analysis?
Very accurate: 99.6% BPM exact and 97.4% first beat within 10 ms, measured on purchased Beatport tracks. Tempo 97% within ±4% on a human-annotated EDM test set, and key 93% agreement with the majority of three established key tools on purchased tracks. All values with their datasets are under Features & measurements.
What happens to my library during sync?
You see a preview of what changes first, and Sonodex only writes once you agree. Checksums and a journal secure the process: if a sync is interrupted, Sonodex restores the previous state. You undo changes made in Sonodex itself in the history.
Do I need an account?
No. You can use Free without signing in. For Pro you need a free Sonodex account.
What does Sonodex cost?
Free costs nothing. Pro costs a one-time €29 including any applicable taxes at the founder price, for the first 500 licences; after that €49. No subscription. Until online purchase is enabled, the Sonodex team unlocks Pro for you.
Does Sonodex also run on Mac?
Sonodex runs on Windows 10 and 11 (64-bit). There is currently no download for macOS or Linux.
Where do my tracks stay?
Music files and library stay on your computer, and analysis runs locally. Sonodex does not offer cloud storage for music.
Ready for your next gig?
Download Sonodex for free: import, check and sync without an account and without a subscription.
- Usable without an account
- Music stays local
- No subscription