DSF Converter Audio Files on Mac OS X, Windows [Software]
audio file converter for music production and hi‑end audio

DSF Converter Audio Files on Mac OS X, Windows [Software]

AuI ConverteR 48x44 is DSF converter to/from WAV, FLAC, AIFF, DSF files. Conversion (1-bit audio) ISO, DFF, DSF to DSF is supported. Sample rates 2.8(D64) / 5.6(D128) / 11.2(D256) / 22.5(D512) / 45.2(D1024) MHz. Intended for audiophiles and music production. Operation systems: Mac OSX, Windows.
Look quality, format, configuration issues below. Check AuI ConverteR's minimal price options >


Watch and share: Studio Audio Converter DSF to FLAC, WAV, AIFF, mp3, ...

General issues

Aims of music conversion:

  • format adjusting (DSF, DFF, FLAC, WAV, etc.) to hardware / software abilities,
  • resolution adjusting [sample rate, bit depth, 1-bit sigma delta modulation (a.k.a. DSD) or PCM] to hardware / software abilities,
  • using of audio system resolution, that cause lesser distortions.


DSF is audio file format (.dsf extension) with high resolution DSD audio stream. DFF file is alternative DSD sound format container. A DSD converter between the files (containers) may be implemented as lossless re-packer of binary identical musical content. Or the conversion tool may have appropriate mode to repacking without losses.

Simplified DSF file structure:

  • header
  • DSD sound data
  • id3 metadata block.

Format specification link see below.

The DSD data divided by blocks. Last of block may be filled partitially.

Stereo 2.0 and multichannel 5.1 formats are supported. Also other channel number may be supported.


Music players able playback 1-bit stuff straight on DSD DAC (native 1-bit DAC) or convert in real-time ("on fly") to PCM format so that PCM DAC feeding (multibit DAC).

Conversion 1-bit sigma delta modulation to PCM is lossy. Physically the conversion is filtering high frequency noise. The filtering band may have different width. It define music signal band width. Other side, it cause more high frequency noise energy, that can cause audible intermodulation distortions at some playback systems.

DSD resampling, gain altering is lossy anyway.

All losses noted in this article part is not significant for professional conversion software.


Real-Time vs. Non-Real-Time Conversion

PCM to DSD, DSD to PCM conversion audio quality depend on signal-processing precision. But it is lossy action anyway.

As rule, offline (non-realtime) converter DSF to PCM or PCM to DSF implemented on computer have fewer time computing restrictions, comparing with real-time processing. Offline processing may allow higher calculation precision, that consume additional time. Qualitative offline processing may be performed at old computers even.

If processing is performed once, it save electric energy that computer consume in intensive calculations.




Conversion quality of the conversion software close theoretical limits.

Approximate Audio Format Quality by Results These Tests
(the best at first place)

1. WAV PCM 32-bit float, DSD 256 and above

2. DSD 128

3. WAV PCM 24-bit

4. DSD 64

5. WAV PCM 16-bit

Read about quality comparison of PCM and DSF formats. In the article compared WAV vs. DSF. This comparing matched ISO (1-bit hi-res audio), DFF, AIFF, FLAC and any lossless formats.

PCM 32-bit, DSD 256 and above in the tests have measurement tool limitation. Therefore, all these formats were placed at first position.

DSD sample rate is matter of noise level inside useful band. Reducing the noise level can cause instability of sigma-delta modulator. However higher sample rate allow to reduce noise and get wider musical signal band.



Price options of DSF converter

Minimal price options

Minimal configuration to convert DSF/DFF (D64/128) to FLAC, WAV and other PCM (up to 192 kHz, 24 bit, 32 bit float):

[ Mac OS X ]      [ Windows ]


Minimal configuration to convert FLAC, WAV and other PCM (up to 192 kHz, 24 bit, 32 bit float) to DSF/DFF (D64/128):

[ Mac OS X ]      [ Windows ]


Minimal configuration to convert DSF/DFF (D64/128) to DSF/DFF (D64/128):

[ Mac OS X ]      [ Windows ]



The conversion software support DSF, DFF, ISO (D64, D128) as input (maximal PROduce-RD, configurable Modula-R editions to save budget):

1. Convert WAV, FLAC, AIFF, ISO, DSF, DFF to DSF

2. DFS sample rates 11.2 (D256),  22.5 (D512), 45.2 (D1024) MHz.

Read articles about different kinds of conversions below.

Configure and order Modula-R right now or request us appropriate configuration here >



Sound quality settings

If input and output sample rates are different, resampling signal processing is used. Resampling base on filtering with settings described below.

At Settings > General tab > select one of Filter mode's options:

  • "Optimized resampling filter" cut frequencies upper 20 kHz (eliminating intermodulation distortions by ultrasound);
  • "Non-Optimized resampling filter" remove all upper 20...24 kHz (depend on input/output sample rates) - eliminating intermodulation distortions by ultrasound, wider signal band;
  • "Non-Optimized wide resampling filter" suppress all upper 20...100 kHz (depend on input/output sample rates).


At some equipment "Non-Optimized..." modes can cause audible noise (see video).
Generally, "Optimized..." mode is recommended. But you can prefer other modes.

Use minimum phase filter switch checked/unchecked minimum/linear phase filtering when "Optimized resampling filter" is selected. Other modes use linear filtering only.


Dithering application have sense in 16 bit PCM target format only.
If output bit depth 24 bit and above (including 1-bit, float point PCM formats), dithering auto turn off.


Read articles about DSF Converter



ISO to DSF >

DFF to DSF >

How to convert ISO to DSF, WAV without clicks >

Extract ISO to DSF PCM. Clicks issues [4 parts] >




Read also

What is DSF >

How to work DSD converter >



DSF specification

ID3 metadata standard

Download HD audio converter AuI ConverteR 48x44 FREE for high resolution music
WAV, FLAC, AIFF, ALAC, (1-bit audio) ISO, DFF, DSF, WMA, mp3, CD-audio...

WARNING: DSF, DFF is supported in maximal PROduce-RD and configurable Modula-R
FREE demo mute 2 second silence in the output middle of ISO tracks, DSF, DFF
with length more 3 minutes


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 oversampling. D64 vs. D128 >
  7. Audio Converter DSF to FLAC >
  8. How Impact to Audio Quality of PCM to DSF Conversion. 1-bit DSF vs. PCM >



Read articles
How to Improve Sound Quality
How to Choose the Best Audio Converter Software
Where is the Limit of Audio Quality?
How to Convert ISO to FLAC on Mac OSX, Windows [Step-by-step Guide]
How to Convert ISO to DSF on Mac OS, Windows [Step-by-step Guide]
DFF to DSF Converter on Mac OS, Windows [Audio Software]
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