Supported Audio Formats
| Format | Extension(s) | Bit Depth | Sampling Frequency | Bit Rate | Encoding |
|---|---|---|---|---|---|
| MP3 | .mp3 | 16 bit | 32 kHz, 44.1 kHz, 48 kHz (MPEG-1) / 16 kHz, 22.05 kHz, 24 kHz (MPEG-2) | 32–320 kbps (MPEG-1), 16–160 kbps (MPEG-2) | MPEG-1 Audio Layer-3, MPEG-2 Audio Layer-3, CBR & VBR |
| AAC | .m4a, .aac, .mp4 | 16 bit | 16 kHz, 22.05 kHz, 24 kHz, 32 kHz, 44.1 kHz, 48 kHz | 16–320 kbps | MPEG-4 AAC LC, CBR & VBR |
| WAV | .wav | 16 bit, 24 bit | 44.1 kHz, 48 kHz | — | Uncompressed PCM |
| AIFF | .aif, .aiff | 16 bit, 24 bit | 44.1 kHz, 48 kHz | — | Uncompressed PCM |
Some files may not play even if the format is listed as supported. The most common cause is encoding that technically matches the format but violates the exact spec — see compatibility issues below.
USB & SD Card Specifications
| Supported filesystems | FAT, FAT32, HFS+ |
|---|---|
| NTFS | Not supported |
| Max. folder depth | 8 levels |
| Max. folders per folder | 10,000 displayed |
| Max. files per folder | 10,000 displayed |
| USB hubs | Not supported |
| External optical drives | Not supported |
| SD card max. capacity | 32 GB |
| SD card standard | SD (up to 2 GB, FAT/FAT32), SDHC (4 GB–32 GB, FAT32) |
| CPRM (protected SD content) | Not supported |
Common Compatibility Issues
FLAC files are not supported
The CDJ-900 does not support FLAC. If your USB stick contains FLAC files, they will not play on this model.
Full fix guide: Which CDJs Play FLAC? Fix E-8305 on Older Pioneer PlayersApple Lossless (ALAC) files are not supported
The CDJ-900 does not support ALAC (.m4a Apple Lossless). ALAC files will not appear as playable tracks.
Full fix guide: CDJ E-8305: Apple Lossless ALAC (.m4a) Not SupportedWAV/AIFF: Sample rates above 48 kHz not supported
The CDJ-900 supports WAV and AIFF only at 44.1 kHz and 48 kHz. Files at 88.2 or 96 kHz will not load.
Full fix guide: CDJ E-8305: 96 kHz WAV / AIFF Not Playing — FixWAV: 32-bit float files do not play
The CDJ-900 only supports 16-bit and 24-bit PCM WAV. DAW exports default to 32-bit float WAV, which the player rejects silently.
Full fix guide: CDJ E-8304/E-8305: 32-bit Float WAV Fix — Pioneer CDJWAV: Non-standard header format (WAV EXTENSIBLE)
Some recording software writes WAV files with EXTENSIBLE headers instead of standard PCM. The CDJ-900 cannot parse this variant.
Full fix guide: CDJ E-8305: WAVE_FORMAT_EXTENSIBLE WAV Fix (Bandcamp)AIFF: Compressed AIFF-C files not supported
Only uncompressed PCM AIFF is supported. AIFF-C (compressed) files will not play.
Full fix guide: CDJ E-8305: Compressed AIFF-C File Fix (ALAW, ADPCM)AAC: DRM-protected files cannot be played
DRM-protected AAC files from the iTunes Store cannot be decrypted. Only DRM-free .m4a files are supported.
Full fix guide: CDJ E-8305: DRM-Protected AAC (iTunes Store) Cannot PlayUSB: NTFS filesystem not recognized
USB devices formatted as NTFS will not appear in the source list. Reformat as FAT32 or HFS+ before use.
Reformat your USB device as FAT32 or HFS+. On Windows: right-click the drive → Format → FAT32. On Mac: Disk Utility → Erase → MS-DOS (FAT) or Mac OS Extended.
Check your library
Scan for compatibility issues before your gig
Manually checking files works for single tracks. For a full library of hundreds or thousands of files, Boothready scans everything in one pass — WAV encoding, sample rates, FLAC compatibility on older models, and path lengths — and auto-fixes what it can before you export to USB.
About the CDJ-900
The CDJ-900 was Pioneer's mid-range club player from 2010 and remains in many booths alongside CDJ-2000s. It supports MP3, AAC, WAV, and AIFF from USB, SD card, and disc — but not FLAC or Apple Lossless — and WAV/AIFF is limited to 44.1 and 48 kHz. Understanding these limits is important when preparing USB sticks for venues with older hardware.
- Released
- 2010
- Manufacturer
- Pioneer
- Product line
- CDJ mid-range series
- Position
- Mid-range club player
- Disc support
- Yes — CD, CD-R/RW, DVD-R/RW, DVD+R/RW
- Successor
- CDJ-900NXS
- PRO DJ LINK
- Yes — up to 4 players via LAN
CDJ-900 vs CDJ-900
| Feature | CDJ-900 | CDJ-900NXS |
|---|---|---|
| FLAC support | No | No |
| WAV up to 96 kHz | No | No |
| Disc support | Yes | Yes |
| SD card slot | Yes | No |
| Beat Sync | No | Yes |
| Slip mode | No | Yes |
| rekordbox iOS/Android | No | Yes |
| Released | 2010 | 2013 |
Frequently asked questions
Does the CDJ-900 support FLAC?
No. The CDJ-900 does not support FLAC or Apple Lossless. Convert FLAC files to WAV or AIFF (16 or 24 bit, 44.1 or 48 kHz) before use.
What file system does a CDJ-900 USB need?
Your USB device must be formatted as FAT16, FAT32, or HFS+. NTFS is not supported. The CDJ-900 also has an SD card slot supporting SD and SDHC cards up to 32 GB.
Does the CDJ-900 have an SD card slot?
Yes. The CDJ-900 has an SD card slot supporting SD cards (up to 2 GB) and SDHC cards (4 GB–32 GB). CPRM is not supported.
Can the CDJ-900 play WAV files at 96 kHz?
No. The CDJ-900 supports WAV and AIFF only at 44.1 kHz and 48 kHz. Files at 88.2 or 96 kHz will not load.