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

AuI ConverteR 48x44 is a DSF converter to/from WAV, FLAC, AIFF, DSF, DFF files. Extraction of SACD ISO to DSF is supported. Sample rates: 44.1 kHz ... 1536 kHz / 2.8 (DSD64) / 5.6 (DSD128) / 11.2 (DSD256) / 22.5 (DSD512) / 45.2 (DSD1024) MHz. The software is intended for audiophiles and music production. Operating systems: Mac OSX, Windows.
Read about sound quality and DSD formats below.

April 30, 2023 updated | since January 4, 2015

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
Optimize music files
 to reach your device's sound quality limit,
get compatible audio format or save disk space

AuI ConverteR 48x44
 audio file converter software
 for music production and discerning music lovers

FLAC, DSF, DFF, SACD ISO, mp3, m4a, CUE, CD...
We think about quality. You just work with music.
 since 2011
AuI ConverteR 48x44 - audio converte software



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

General issues

Aims of music conversion:


DSF file description

DSF is an audio file format (.dsf extension) with a high-resolution DSD stream (1-bit sigma-delta modulation).

Simplified DSF file structure:

See below the link to the format specification.

The DSD data is divided into blocks. The last block may be filled partially. If a software or hardware ignore it, audible pops may be caused.

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

DFF file is an alternative container for DSD sound format. A DSD converter between these file types (containers) may support a lossless re-pack of binary identical musical content.

AuI ConverteR has such an ability, that is called "bit-perfect" mode. Go to Settings, General tab, and check "Don't make DSP..." switch. In the main window, set Sampling rate "as input".

If you convert DSD to PCM files, set Sampling rate and bit depth explicitly.


Music playback, DSP

Music players are able to playback 1-bit Direct Stream Digital stuff straight on DSD DAC (native 1-bit DAC) or convert in real-time ("on fly") DSD to PCM format to feed PCM DAC.

Conversion of 1-bit sigma-delta modulation to PCM is lossy. Physically the conversion is filtering high-frequency noise. The filtering band may have different widths. It defines music signal bandwidth. Another side, it causes more high-frequency noise energy, which can cause audible intermodulation distortions in some playback systems.

DSD resampling, gain altering, audio normalizing are lossy digital signal processing (DSP) 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 a computer have fewer time computing restrictions, in comparison with real-time processing. Offline processing may allow higher calculation precision, which consumes additional time. Qualitative offline processing may be performed on old computers even.

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




Conversion quality of the converter software is close to theoretical limits.

Approximate Audio Format Quality by Results These Tests
(the best in the 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 the quality comparison of PCM and DSF formats. The article compares WAV vs DSF. This comparison matched SACD ISO, DFF, AIFF, FLAC and any lossless formats.

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

DSD sample rate is a matter of noise level inside a useful band. Reducing the noise level can cause instability of sigma-delta modulator. However higher sample rate allows for reduced noise and gets a wider musical signal band.




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 to PCM [Modula-R edition]

[MINIMUM PRICE] configuration
DSF/DFF (up to DSD128) to PCM (WAV, FLAC, AIFF (up to 24 bit / 192 kHz), mp3, m4a,...)
audio file converter [consists of 2 modules]

DSF/DFF to PCM [Modula-R edition]
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...

See more configurations of DSF, DFF to PCM converter...

Convert PCM to DSD files [Modula-R edition]

[MINIMUM PRICE] configuration to convert
PCM (WAV, FLAC, AIFF (up to 24 bit / 192 kHz), mp3, m4a,...) to DSF/DFF (up to DSD128)
audio file converter [consists of 2 modules]

Convert PCM to DSD files [Modula-R edition]
Best Seller


PCM to PCM conversion is included.

Read User Manual...

See more configurations of PCM to DSF/DFF converter...

Convert DSD files [Modula-R edition]

[MINIMUM PRICE] configuration DSF/DFF (up to DSD128) to DSF/DFF (up to DSD128)
audio file converter [consists of 3 modules]

Convert DSD files [Modula-R edition]
Best Seller


PCM to PCM, DSF/DFF to PCM, PCM to DSF/DFF conversions are included.

Read User Manual...

See more configurations of DSF/DFF to DSF/DFF converter...

Build custom configurations > Expand functionality > Ask for advice >



Sound quality settings

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

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


On some equipment "Non-Optimized..." modes can cause audible noise (see video).
Generally, one of "Optimized..." modes 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. Read more...


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


dsf converter of audio files


Read articles about DSF Converter


Additional information




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 >
  9. Which player can play DSD files? >