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DFF/DSF to FLAC Converter [Mac Windows Software]

AuI ConverteR 48x44 is audio file DFF, DSF to FLAC converter [DSD to Free Lossless Audio Codec] for Mac OS and Windows. It's designed for music production and demanding audiophiles. Read below about minimum price configurations to convert DFF, DSF to FLAC.

May 26, 2023 updated | since June 20, 2016

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
Audiophile DSF to FLAC converter

Audiophile DSF, DSF (DSD files) to FLAC converter


    to playback on:
        digital audio player (DAP),
        media server/streamer,
        car stereo;
     to convert 1-bit audio files
        for playback on PCM DAC.

    Multichannel and stereo
    DSF sample rates D64/128/256/512/1024
    FLAC sample rate up to 352/384 kHz
    Auto loudness normalizing



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



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.

* 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.

FULL-FEATURED version [AuI ConverteR PROduce-RD]

[MINIMUM PRICE] for full functionality of AuI ConverteR, in comparison with Modula-R edition that is including all modules.

FULL-FEATURED version [AuI ConverteR PROduce-RD]
Best Seller


All abilities are included in PROduce-RD version. It allows saving budget, comparing purchasing of the full abilities (all modules) of Modula-R edition. Unlimited-time license, paid major updates (... 10.x > 11.x > 12.x ...).

DSF/DFF (up to DSD128) to PCM [AuI ConverteR Modula-R]

[MINIMUM PRICE] configuration
DSF / DFF (up to D128) to PCM (WAV, FLAC, AIFF (up to 24 bit / 192 kHz), mp3, m4a,...)
audio file converter [consists of 2 modules]

DSF/DFF (up to DSD128) to PCM [AuI ConverteR Modula-R]
Best Seller


The configuration allows convert DSD files (.dsf, .dff) to FLAC, WAV, mp3 and other PCM files. PCM to PCM conversion is included.

Read the user manual...
The configuration abilities may be expanded by purchasing other modules.
Unlimited-time license, paid major updates (... 10.x > 11.x > 12.x ...).

DSF/DFF (up to DSD512) to PCM [AuI ConverteR Modula-R]

[RECOMMENDED] configuration to convert
DSF / DFF (up to DSD512) to FLAC (up to 192 kHz, 24 bit, 32 bit float) [consists of 6 modules]

DSF/DFF (up to DSD512) to PCM [AuI ConverteR Modula-R]


The configuration abilities may be expanded by purchasing other modules.
Unlimited-time license, paid major updates (... 10.x > 11.x > 12.x ...).

Build custom configurations > Expand functionality > Ask for advice >




Watch and share: How to convert DSF to FLAC




In the conversion software's main window click Settings button. Appear Settings window. In Settings window > General tab > FLAC compressing slider. Compressing level doesn't impact sound quality.

FLAC specification (see link below) allows using sample rate up to 384 kHz and bit depth up to 32-bit integer. Float point bit depths don't supported.



Sound quality of DSF to FLAC Conversion

When software converts DSF (DSD file format) to FLAC, it adds distortions anyway. In general, the distortion level is comparable with resampling. The most important feature of the conversion software is the distortion level.

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 ideal case, should not be repeatable lines with lower brightness. These lines show audible distortions, that correlate with original signal.

All AuI ConverteR’s editions have identical sound quality (fully identical digital signal processing).

Difference in functional restrictions Free and commercial versons see here...

Conversion 1-bit audio to PCM, considered in the article, is filtering with dividing sample rate (decimation). The quality of DSD-audio decoding to PCM is defined by quality of the filtration. See details by link about DSD demodulator below.

Some albums must be playback as continuous music stream: operas, musicals, live concerts and others. Non-zero levels are possible at track borders. If a conversion software re-initialize processing at each track, artifacts appear at the borders. The converting software has functionality to process all album tracks as a single audio stream. Processing initialized once - at the begining of the album.

DSD stuff has a headroom of about -6 dB, as rule. It is solving DSD modulator's stability issue. Auto-level normalizing allows automatical compensation of the headroom and maximally (0 dB) increases the peak level of converted PCM audio stuff.

Oversampling can cause overload too. Auto-level normalization fix it.

The conversion software has several types of resampling filters:

In some music systems, "Non-Optimized..." modes can cause audible noise (see video).
In general, "Optimized..." mode is recommended.

These modes are selected in Settings > General > Filter mode.


How to convert DSF to FLAC

Read details here >


What is available in FREE version?

FREE version has audio quality fully identical the commercial editions.

FREE version in the middle of converted songs two seconds are muted.

Read details...



Frequently Asked Questions

How do I convert DSF to FLAC?



How do I convert DSF to mp3?

Read the step-by-step user guide on how to convert  DSF to mp3...


Is DSD better than FLAC?

What is better FLAC or DSD is a matter of your audio system and record producing/distributing quality.  Read details...


What is a DSF audio file?

DSF audio file is one of DSD format files (example: DFF, SACD ISO, others).  Read details...


Can VLC play DSF files?

As far as the author knows, at the moment of the article writing, VLC doesn't support DSD (DSF, DFF, SACD ISO) files.


How do I play DSF on foobar2000?

Read step-by-step  DSD on foobar2000 user guide...


Read articles




Read more

  1. DSF file format. DSF extension >
  2. How open DSF files audio >
  3. How to playback DSF files in Foobar2000 [Step-by-Step] >
  4. DSD vs DSF vs DFF Files Audio >
  5. DSF to PCM converter >
  6. DSF File Converter >
  7. DSF oversampling. D64 vs. D128 >
  8. How Impact to Audio Quality of PCM to DSF Conversion. 1-bit DSF vs. PCM >