DFF vs W64
A detailed comparison of DSD Interchange File and Sony Wave64 — file size, quality, compatibility, and which format to choose for your workflow.
DSD Interchange File
Audio FilesDFF (DSDIFF - DSD Interchange File Format) is the original file format for DSD audio data, developed by Philips. Unlike DSF, it uses a chunked IFF structure and is the native format for many professional DSD recording systems.
About DFF filesSony Wave64
Audio FilesWave64 (W64) is an extension of the WAV format developed by Sony that breaks the 4 GB file size limit of standard WAV by using 64-bit chunk sizes. It is used in professional audio production for very long or multi-channel recordings.
About W64 filesStrengths Comparison
DFF Strengths
- SACD-native format.
- Supported by high-end DACs.
- Bit-exact DSD preservation.
W64 Strengths
- Unlimited file size (64-bit chunks).
- Professional DAW compatibility.
- Bit-exact lossless.
Limitations
DFF Limitations
- No metadata support.
- Huge files (2-6 GB album).
- Niche audiophile market.
- Specialized decoder hardware needed.
W64 Limitations
- Less universal than WAV.
- Niche — only matters for very large sessions.
- Competes with RF64.
Technical Specifications
| Specification | DFF | W64 |
|---|---|---|
| MIME type | audio/x-dff | audio/x-w64 |
| Extension | .dff | .w64 |
| Sample rate | 2.8224 MHz (DSD64), 5.6448 (DSD128) | — |
| Creator | Philips | — |
| Sibling | .dsf | — |
| Max size | — | 2^64 bytes |
| Relative | — | RF64 (EBU 64-bit WAV) |
Typical File Sizes
DFF
- Full SACD album (DSD64) 2-4 GB
- DSD128 album 4-8 GB
W64
- 1-hour 24-bit 48 kHz mono ~620 MB
- 48-hour field recording ~30 GB
Ready to convert?
Convert between DFF and W64 online, free, and without installing anything. Encrypted upload, automatic deletion after 60 minutes.
Frequently Asked Questions
DFF (DSD Interchange File) is an audio file format used to store sound recordings — music, voice, podcasts, sound effects. The format defines how the audio samples are compressed (or stored raw), what bitrates are supported, and how metadata such as title, artist, album, and cover art is embedded. It is part of the audio files family.
DFF (DSD Interchange File) is an audio formatoo de arquivo used to store sound recordings — music, voice, podcasts, sound effects. The formato defines how the audio samples are comprimido (or stored raw), what bitrates are suportado, e how metadata como title, artist, album, e cover art is embedded. It is part of the audio arquivos family.
VLC, foobar2000, and the default media players on Windows and macOS handle DFF natively. On mobile, iOS Music and Android media apps vary in their support — popular formats work everywhere; niche ones may need a dedicated app. If playback fails on a device, converting to MP3 or AAC usually solves it.
VLC, foobar2000, e the default media players no Windows e macOS handle DFF natively. On mobile, iOS Music e Android media apps vary in their support — popular formatoos funcionar everywhere; niche ones may need a dedicated app. If playback fails em um device, convertendo to MP3 ou AAC Geralmente solves it.
Upload the DFF to KaijuConverter and pick MP3, WAV, FLAC, AAC, OGG, or any other target. Our FFmpeg pipeline decodes the audio and re-encodes to the target format at sensible default bitrates (VBR ~190 kbps for music, 96 kbps for speech). Metadata and cover art travel with the audio where both formats support them.
DFF can be lossy or lossless depending on the specific variant. Lossy variants (smaller files) discard some audio detail during compression in ways tuned to be inaudible; lossless variants preserve every sample exactly but produce larger files. For distribution, lossy at high bitrate is standard; for archival, lossless wins.