DFF to FLAC Converter Software [Mac Windows]
audio file converter for music production and hi‑end audio

DFF to FLAC Converter Software [Mac Windows]

AuI ConverteR 48x44 is DFF to FLAC converter (Mac OS, Windows) of audio files. For music production and hi-end home audio. In this article minimal price configurations are reviewed.
Read step-by-step guide below

How to convert DFF to FLAC

To convert DFF to FLAC (DSD to PCM file):

  1. Launch AuI ConverteR 48x44.

  2. Push Open files button and select *.dff file.
    First time, codec request window appear. To auto download and install the codec, push OK button.
  3. Choose FLAC in main window (right middle part) Format field.
  4. Choose output directory:
    In main window of the conversion software (left lower part) Directory output files fieldSet output directory for converted files
    It can be as absolute as relative source-stuff directory.
  5. Push Start button. Wait until end of conversion.
    Look for converted stuff into directory that selected in goal 3.


Set output compression level:

  1. In the conversion software's main window push Settings button, Settings window is appear.
  2. In Settings window > General tab > set the level via FLAC compressing slider.

Any compressing level provide same sound quality.


Audiophile DFF to FLAC converter software

DFF to FLAC converter audio

    prepare music for:
        digital audio players,
        mobile phones,
        media servers/streamers,
        car stereo systems;
    convert 1-bit audio stuff
        for PCM DAC.

    Multichannel and stereo
    DFF D64 / 128 / 256 / 512 / 1024
    FLAC 16 / 24 / 32 bit, 44.1 ... 352/384 kHz
    Auto loudness normalizing
    Uncompressed FLAC

Check minimal price options (from $62.4*) >

WARNING: DVD-audio/video, Blue-Ray, DVD/BlueRay/CD ISO are NOT supported.
For Modula-R version, SACD ISO, DSF, DFF are supported in proper configurations.
For ISO tracks, DSF, DFF longer 3 minutes, FREE demo mutes 2-second silence in the output middle, and has other restrictions

Watch and share: Audiophile DFF to FLAC converter


  • Studio sound quality
  • DFF sample rates: D64/128/256/512/1024
  • FLAC sample rate: 44.1 to 352.8, 384 kHz
  •            bit depth: 16, 24, 32 bit
  •            adjusted compression level: yes
  • Stereo and multichannel both are supported
  • Downmixing multichannel 5.1 to 2.0
  • True gapless conversion (see below)
  • Auto level normalization (see below)
  • 3 resampling fiter modes (into DFF decoder), including audio optimization to reduce audible distortions at some systems;
    (from optimized mode (eliminating of audible ultrasound intermodulation products at some equipment) to 100 kHz wide band mode)
    Metadata editor (add/edit/remove album, song names, year, performer, genre and other, add/remove artworks *.png, *.jpg)
  • group metadata editing of several files.
Watch and share: Experiment with audio optimization


True Gapless Mode

True gapless mode intended for albums, that should sound as solid stream. It is live concerts, operas and other. After resampling at track borders, artefacts can appear. It happens due processing re-initialization at the begin each track. In True gapless mode initialization is performed at begin of first album track.

If True Gapless Mode turned on, album tracks are converted sequentially, one-by-one. There is need information about end of previous track before start processing next one.

True gapless mode


Auto level normalization

As rule, 1-bit records have -6 dB headroom by sigma-delta modulator stability issues.

Auto level normalization allow to maximize album level with keeping relative levels of its tracks.

Watch and share: Loudness normalization by peak level



Sound quality

Sound quality (distortion value) is first point of attention in design professional software. Tranformations should be transparently to original stuff quality as possibly.

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 (aliases). The aliases are audible distortions, that correlate with original signal.

Any AuI ConverteR’s version provide fully identical signal processing quality.

But functional restrictions and available formats, sample rates, etc. are different.

The software convert DFF audio file to FLAC as sigma-delta-modulation noise filtering.

Operas, musicals, live concerts and same albums are solid music stream. Recording is done in single file. Before placement at optical disk the stream is divided into tracks. At its borders non-zero loudness are possible. It can cause border artefacts.

Converting such tracks as separate files, cause aftefacts at track borders. Because processing is initialized at begin of next track. True gapless conversion process these tracks as single stream with initialization at first album composition begin only.

1-bit formats maximal value is  -6 dB limited. It is DSD modulator's stability issues. Auto level normalizing magnify (or reduce in some cases) loudness of all tracks so maximal peak level of full converted album is 0 dB.

Resampling filters of the conversion software are reviewed here.



DFF to FLAC Converter Configurations

AuI ConverteR has several price/functionality options that allow saving your budget for the required functionality. You can expand Modula-R abilities later via purchasing new modules.

* All prices at this page in the 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.

[MINIMUM PRICE] configuration to convert
DSF / DFF (up to DSD128) to FLAC
(up to 192 kHz, 24 bit, 32 bit float)


[Recommended] configuration (from $155.4*) to convert
DSF / DFF (up to DSD512) to FLAC
(up to 192 kHz, 24 bit, 32 bit float)
with parallel processing, true gapless mode, level normalization.



You can either buy unlimited-time license and pay for major updates (... 10.x > 11.x > 12.x > ... versions).

Full functionality






Frequently asked questions

What are DFF files? What is DFF audio file?

DFF files are audiophile DSD file format. Read details...


Is DFF lossless?

DFF is lossless audio file. Read details...


What is .DSF audio file? What is DSF format?

DSF files are audiophile DSD file format. It is the same DFF by sound quality. Read details...


What is the difference between DSF and DFF?

DSF file has advanced support of metadata.


What is a DSDIFF file?

DSDIFF file is DFF file. Read details...


What is SACD ISO?

SACD ISO is ripped image of SACD optical disk file is DFF file.




How do you play DFF? How do I play DFF files?

See DFF audio player list...


Is DSD better than FLAC?

Read article about comparison DSD and FLAC...


Can you convert DSF to FLAC?

Yes. You can convert DSF to FLAC. Read guide...



Read more

About FLAC (Free Lossless Audio Codec) >

About DSD demodulator >



DFF format specification

Free Lossless Ausio Codec format specification



Read more about DFF

  1. DFF file format. DFF file extension >
  2. DFF to DSF Conversion on Mac OSX, Windows, Linux >
  3. DFF to DSF Converter >
  4. How convert DST compressed DFF under Windows >


Read more about FLAC


July 31, 2022 updated | since June 28, 2017

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["Audiophile Inventory" (since 2011), "AudiVentory", "Audiophile Inventory by AudiVentory.com".
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All prices at this site in the U.S. dollars without V.A.T. and other applicable taxes and fees. The prices are recommended. All information at this site is not a public offer.

Read about supported formats and third-party codecs

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