Free online DFF to W64 converter

Source format: DFF

DFF is a DSD audio container format, most commonly associated with DSF/DFF files used for high-resolution music playback. It is used by audiophiles, archivists, and some music production workflows that preserve the original Direct Stream Digital audio data from SACD rips or native DSD recordings. DFF files are typically used when the goal is to keep the audio in its original high-bit-rate, one-bit form rather than converting it to PCM.

Target format: W64

W64 is the Wave64 audio container format, an extended version of WAV designed by Sony to overcome the 4 GB size limit of standard WAV files. It is useful for very large uncompressed audio files, especially in professional audio editing, mastering, and archiving. Compared with standard WAV, W64 supports much larger files and is better suited for long recordings or high-resolution audio that would exceed the classic WAV size limit.

How to perform the conversion

The most practical way to convert DFF to W64 is with FFmpeg, because it can decode DSD audio and write Wave64 output. Since W64 is a PCM container, the conversion usually involves decoding DFF to PCM first, which means the result will not remain DSD.

1. Install FFmpeg on your computer.
2. Open a terminal or command prompt in the folder containing the DFF file.
3. Run a command such as ffmpeg -i input.dff output.w64.
4. If needed, specify the sample rate and bit depth explicitly, for example ffmpeg -i input.dff -c:a pcm_s24le output.w64.
5. Check the resulting file in an audio player or editor that supports Wave64.

If you prefer a graphical workflow, use an audio editor that can open DFF and export Wave64, such as foobar2000 with suitable components or professional audio tools that support DSD import and Wave64 export. In many cases, the simplest option is to convert the file on 101convert.com for free, without installing any software.

Notes on quality, compatibility, and limitations

The main limitation of this conversion is that DFF is DSD while W64 is PCM-based, so the process is not lossless in the format sense. The audio data is decoded from DSD into PCM, and the output quality depends on the chosen sample rate, dithering, and conversion settings. For best results, use a high-quality DSD-to-PCM conversion tool and keep the output at a sufficiently high sample rate.

Another important point is compatibility: W64 is supported by fewer players and editors than standard WAV, so make sure your target software can open Wave64 files. If broad compatibility is more important than large-file support, standard WAV may be a better choice. Also, some DFF files contain metadata or channel layouts that may not transfer perfectly during conversion, so verify tags and playback after converting.