Free online DSF to FLAC converter

Source format: DSF

DSF stands for DSD Stream File. It is a container format used to store DSD audio in a file, usually for high-resolution music playback and archiving. DSF is commonly associated with Sony, SACD ripping workflows, and audiophile music libraries. It can also store metadata such as track titles, artist names, album art, and other tags.

Because DSF is a specialized format, it is mainly used by audiophiles and by software or hardware that supports DSD playback. It is not as widely supported as standard PCM-based formats, so conversion is often needed for broader compatibility.

Target format: FLAC

FLAC stands for Free Lossless Audio Codec. It is a widely supported lossless audio format that compresses audio without removing information from the source PCM data. FLAC is popular because it offers smaller file sizes than WAV or AIFF while preserving full audio quality.

FLAC is supported by most music players, media servers, phones, car audio systems, and editing tools. It is a common choice for archiving, music libraries, and portable high-quality playback.

How to convert DSF to FLAC

The most reliable way to convert DSF to FLAC is with desktop audio software that can decode DSD and export FLAC. Good options include foobar2000 on Windows and FFmpeg on Windows, macOS, and Linux.

Method 1: foobar2000

1. Install foobar2000 and make sure it can open DSF files.
2. Open the DSF file in the player.
3. Select the file or tracks you want to convert.
4. Choose File → Convert → ....
5. Select FLAC as the output format.
6. Adjust settings if needed, such as compression level and output folder.
7. Start the conversion and save the resulting .flac file.

Method 2: FFmpeg

If your FFmpeg build supports DSF input, you can convert it with a command like:

ffmpeg -i input.dsf output.flac

This reads the DSF source and writes a FLAC file. FFmpeg will decode the DSD audio to PCM during the process, then encode that PCM into FLAC. Metadata is often copied automatically, but tag preservation can vary depending on the source file and build.

Method 3: 101convert.com

You can also convert the file on 101convert.com for free, without installing any software.

Quality, compatibility, and limitations

DSF to FLAC is not a bit-perfect preservation of the original DSD data, because DSF stores DSD audio while FLAC stores PCM audio. During conversion, the audio must be decoded and converted from DSD to PCM before being compressed into FLAC. The result can still sound excellent, but it is a format change rather than a direct copy of the original DSD stream.

For best results, use a converter that supports proper DSD-to-PCM conversion and high sample rates. Metadata support may vary, so check whether album art, track titles, and tags are preserved after conversion. Also note that some players can play DSF directly, but FLAC offers much broader compatibility across devices and software.