Sync to Pioneer USB drives (OneLibrary)
Lexicon can sync your music and playlists to Pioneer / AlphaTheta compatible USB drives, the same that Rekordbox creates.
Lexicon supports both the new OneLibrary database and the old DeviceLibrary on the same USB drive. That means it will work on the newer devices like a CDJ3000 or XDJ-AZ and also on the older devices like a CDJ2000, CDJ900, XDJ-XZ, etc.
Fair warning: Use at your own risk. Always carry a USB drive made by Rekordbox as your backup, no matter how many times a USB sync from Lexicon has worked. You don't want to risk it.
Target USB Drive
You need to select a USB drive to sync to. This drive needs to be FAT32, exFAT or HFS+. This is the same as what Rekordbox supports so if it works there, it will work here. It's best to initialize your USB drive in Rekordbox so it copies your user settings to the drive. If you want to change user/CDJ settings, you need to do it in Rekordbox.
Cue Destination
This is the same setting when syncing to Rekordbox and decides if your cues go to the hot cue bank, memory cue bank or both.
Clean up unused files
Check this setting and Lexicon will delete the music files from your USB that are not in the current sync. Not normally needed but useful if you want a lean USB or if your USB is filling up.
CDJ Compatibility
When syncing to a Pioneer USB drive, Lexicon can scan every audio file for issues that would cause playback failures on CDJ hardware. Pioneer CDJs are notoriously strict about what they accept — and the E-8305 "Unsupported File Format" error gives you zero information about what's wrong. Lexicon detects these issues by reading the binary file headers of each track during export, and for many common problems can automatically patch the file on the USB copy without re-encoding or any quality loss. Your original music files are never modified.
Issues detected and auto-fixed
These issues are automatically repaired on the USB copy. The original file on your computer is never touched.
| Issue | What it means | How Lexicon fixes it |
|---|---|---|
| WAV_EXTENSIBLE header (format tag 65534) | Common in Bandcamp downloads and ffmpeg exports. The WAV file uses an extended format flag that CDJs don't understand, even though the audio itself is standard stereo PCM. | Patches the format tag to standard PCM (1) — a tiny binary change, no re-encoding, zero quality loss. |
| 32-bit float WAV | Standard export format in Ableton, Logic, FL Studio, and Bitwig. No Pioneer CDJ supports 32-bit float audio. | Re-encodes to 24-bit PCM WAV. |
| Sample rate too high (above 48kHz, e.g. 96kHz) | Hi-res audio files that most CDJ models cannot play. | Resamples to 48kHz. |
| Sample rate too low (below 32kHz) | Low-quality files that trigger E-8305. | Resamples to 44.1kHz. |
| VBR MP3 missing Xing header | Variable bitrate MP3 without the header that CDJs need for accurate seeking and duration display. Causes tracks to jump to the wrong position when you seek. | Adds a proper Xing header. |
| Multichannel audio (more than 2 channels) | Surround sound or multi-track files. CDJs only support mono and stereo. | Downmixes to stereo. |
| AIFF-C (compressed AIFF) | A compressed variant of AIFF that no CDJ supports. | Converts to standard uncompressed AIFF. |
Issues detected and warned about
These issues cannot be automatically fixed — Lexicon flags them in the compatibility report so you can address them before your set.
| Issue | What it means | What you should do |
|---|---|---|
| OGG Vorbis (.ogg) | Not supported by any Pioneer CDJ. | Convert to WAV, AIFF, or MP3. |
| WMA (.wma) | Windows Media Audio — not supported by any CDJ. | Convert to WAV, AIFF, or MP3. |
| ALAC (Apple Lossless in .m4a) | Despite being lossless, Apple Lossless is not supported by any CDJ. | Convert to WAV, AIFF, or FLAC. |
| FLAC on older CDJ models | FLAC is only supported on CDJ-3000, CDJ-TOUR1, and CDJ-2000NXS2. Older models will reject it. | Convert to WAV or AIFF, or make sure you're playing on a compatible model. |
| DRM-protected AAC (.m4p) | Copy-protected files from the iTunes Store cannot be played on any CDJ. | Replace with a DRM-free version of the track. |
| VBR MP3 | Variable bitrate MP3s work on CDJs but seeking (fast forward/rewind) is noticeably slower than with constant bitrate files. | For best performance, convert to CBR 320kbps. |
| Corrupted WAV header | The WAV file has an invalid or damaged header (missing chunks, wrong sizes). | Re-export or re-download the file. |
| Corrupted AIFF header | The AIFF file has an invalid or damaged header. | Re-export or re-download the file. |
| File path too long (over 255 characters) | CDJs have a 255-character limit on the full file path. | Shorten your folder or file names. |
Modes
- No detection — No scanning or fixing. Files are exported as-is. Issues are still reported if found.
- Warnings only — Scans all files and generates a report listing every issue found, but does not modify any files on the USB.
- Warn & auto fix (default) — Automatically fixes what it can on the USB copy and reports everything.
- Auto fix — Automatically fixes what it can on the USB copy without showing warnings for fixable issues. Unfixable issues are still reported.
A compatibility report is always saved to your Lexicon Reports folder after each sync, regardless of which mode you choose.