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Convert DSF DFF DSD files to FLAC [Mac Windows] - User Guide

DSD (Direct Stream Digital) became a popular one-bit audiophile file format. The multiple-bit formats, including lossless FLAC, WAV, etc., give an alternative.
DSD playback device or used software should feed a dedicated 1-bit DAC. Many digital-to-analog converters are not capable of it.
If you want ultimate listening experience, you need the right conversion tool with true audiophile quality.
Learn how to accurately convert DSD (DSF, DFF) files to FLAC, and process several files in a batch.

Author: Yuri Korzunov,
Audiophile Inventory's developer with 25+ year experience in digital signal processing,
author of the articles that make audio easy for beginners

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How to convert DSF/DFF to FLAC

Preferable DAC may sound better in multi-bit mode. Your favorite music player may be only compatible with .flac, .wav, .mp3, and similar types. Also, .dff and .dsf consume significant space on a hard disk. It is critical for smartphones and DAPs.
Multiple-bit DAC needs the real-time transformation of Direct Stream Digital. Qualitative sound processing is tough work for powerful computers. With offline conversion, we can take it slow for high sound quality. Keep reading.

To convert DSF, DFF (DSD files) to FLAC on Mac or Windows in high quality:

  1. Start audio converter software AuI ConverteR 48x44.

  2. In the main program window, push Open files button and choose input .dsf (DSD file type)*
  3. In the main window (right middle part), in Format panel, select target FLAC format, its sample rate and bit depth.
  4. Select the target directory for converted files
    See the main window (left lower part) > Directory output files field.
    The directory can be as absolute as a relative (of source file) directory.
    You can enter the directory manually or via "..." button. [?]
    Output directory to convert DSF to FLAC
  5. Click Start button.
  6. Wait until conversion end. Look for converted files in the target directory selected in goal 4.
Watch and share: How to convert DFF/DSF to FLAC [Mac, Windows]
video: Watch and share: How to convert DFF/DSF to FLAC [Mac, Windows]


* if it's available in purchased software configuration (check the DSF to FLAC software configurations). Batch conversion on multiple files is supported in the configurations.

WARNING: DVD-audio/video, Blu-Ray, DVD/BluRay/CD ISO are NOT supported.
For Modula-R version, SACD ISO, DSF, DFF are supported in proper configurations.
For ISO tracks, DSF, DFF longer than 3 minutes, FREE edition mutes 2-second silence in the output middle and has other restrictions. In batch conversion FREE version mutes 2 seconds in the output middle for second and the subsequent files.
Free version has processing sound quality identical commercial editions.




How to convert DSF DFF DSD files to FLAC


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Sound quality of conversion

Various audio conversion software can provide different sound qualities. It is noise and distortion levels, primarily.

AuI ConverteR vs a converter software: DSD64 to PCM 44.1 kHz aliases
AuI ConverteR vs a converter software: DSD64 to PCM 44.1 kHz


In this picture, we can see spectrogram of PCM audio file in CD resolution. This file is result of conversion from DSD file.

The vertical axis is a frequency. Upper along the axis means higher frequency. The horisontal axis is time. The future in the right.

We can see the original signal as the bright line. It is clearly visible on the upper part of the picture.

The distortions are visible as the repeatable lines with lower brightness. These lines show audible distortions, that correlate with the original signal.

Conversion speed may depend on conversion accuracy. Higher accuracy requires more computing resources and time.

Sometimes, when convert files, frequency band reduction can mute playback noise.

Check AuI ConverteR's Settings > General tab > Filter mode list.If you listen to noise in converted FLAC, use "Optimized" mode for DSF to FLAC conversion.

"Optimized G5" mode is slower and recommended for the professional using rather. The mode causes a shorter ringing length.

Read more about filter modes and other quality issues >



Check pricing


AuI ConverteR has several price/functionality options that allow saving your budget for the required functionality. You can expand Modula-R abilities later by purchasing new modules. Unlimited-time license, major updates (... 10.x > 11.x > 12.x > ... versions) are paid.

WARNING: Modula-R modules (parts of AuI ConverteR’s functionality) are NOT compatible with Free version.
ADD-ON modules work with certain CORE modules only (see details).
The module is license key received in order email. To activate module functionality, enter its key in Modula-R executable.
All "Modula-R" modules together have "PROduce-RD"'s abilities.
Full-featured "PROduce-RD" version is like a discount on price of full module kit of "Modula-R" version.

To expand functionality, module(s) (compatible with purchased major version number) may be ordered separately.
Modula-R license cannot be replaced with PROduce-RD.

* All prices on this page are in U.S. dollars without V.A.T. and other applicable taxes and fees. The prices are recommended. Information on this page is not a public offer.



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FLAC data compression

FLAC compression level doesn't alter audio quality of music. After unpacking binary content is the same for any compression level.

Check AuI ConverteR's Settings > General tab > FLAC compressing slider.


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In conversion, the software export metadata, including artwork, from input to output files.

AuI ConverteR's metadata editor allows batch metadata edit of albums (group of files). With the editor, you can assign album artwork.


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Frequently Asked Questions

DSF DFF DSD files to FLAC. F.A.Q.


What is a DSF audio file?

DSF audio file format (.dsf extension) contains DSD audio stream and  information about track (song): artwork, name, album, etc.



Is DSF lossless?

DSF audio file is lossless.

Read details...


Can FLAC be DSD?

FLAC may be converted to DSD audio. Read guide...


Is DSD better than FLAC?

FLAC may be better DSD or worse. It's depending on implementation of ADC, DAC and quality of recorded/played back stuff.



Is there anything better than FLAC?

FLAC is a lossless PCM format. WAV format is more flexible and give wider audio resolution abilities. MQA format decrease sound data size. DSD gives potential abilities to improve sound quality.

It's not simple matter.


Is DSD the best audio format?

DSD audio format is not the best. DSD and PCM formats have their own disadvantages and advantages.



What is the difference between DSD and DSF?

DSF (.dsf extension) is a file format intended for DSD audio data.


How do I convert DSF to FLAC?



Can DSD be converted to FLAC?

Yes. Read manuals on how you can convert DSD to FLAC:


Is DSD to FLAC lossless?

Conversion DSD to FLAC causes some distortions because filtering and resampling are there.

But, a proper conversion causes such small distortions that you can ignore them.



How do I convert DSF to mp3?

Read this step-by-step  DSF to mp3 conversion user guide...


What program can open a DSF file?

DSF audio file may be opened with programs to:


How do I play DSF on foobar2000?

Read step-by-step how to play DSD on foobar2000...


How do I play DSD files?

You can play DSD files with:

Alternatively, you can convert DSD to FLAC, PCM files before playback at an ordinary player...


Can VLC play DSF files?

At the moment of the answer writing, the VLC doesn't play DSF.

However, you can convert DSF files to ordinary FLAC with high sound quality...


Can Foobar play DSF?

Yes. Foobar can play DSF files.


How do I play DSF files on my Mac?

You can play DSF files on Mac with DSD players...


How do I play DSF files on my PC?

To play DSF files on your PC, you need DSD music player software...


How do I play a SACD file?

You can play SACD ISO file with audio player software...


How do I open PCM files?

You can open PCM files with software to:




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Audio samples

Download audio samples:


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