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.
Aims of music conversion:
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.
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.
All losses, noted in this article part, is not significant for professional conversion software.
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.
[MINIMUM PRICE] for full functionality of AuI ConverteR, in comparison with Modula-R edition that is including all modules.
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 ...).
[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]
[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]
[MINIMUM PRICE] configuration DSF/DFF (up to DSD128) to DSF/DFF (up to DSD128)
audio file converter [consists of 3 modules]
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...
December 11, 2022 updated | since January 4, 2015