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AuI ConverteR 48x44 Lite/Audiophil-E

Affordable HiFi mp3 Converter Audio files
convert music for car and portable audio with high fidelity

mp3, WAV, FLAC, AIFF, ALAC, WMA, APE, OGG, mp4,...

Current version: 6.5.0 / 2017 August 18

Using AuI ConverteR 48x44 for home audio

Home applications of AuI ConverteR 48x44

Input DSF, DFF, ISO supported for Audiophil-E and above

Output DSF supported for PROduce-RD only

Metadata editing for PROduce-R and above

See detailed comparing table for editions...

Using AuI ConverteR 48x44 for music production


Input DSF, DFF, ISO supported for Audiophil-E and above

Output DSF supported for PROduce-RD only

Metadata editing for PROduce-R and above

See detailed comparing table for editions...

What advantages you may get with AuI ConverteR

Key advantages of AuI ConverteR 48x44



AuI ConverteR 48x44 have several audio conversion modes



AuI ConverteR 48x44 conversion audio modes



  • Bit perfect change format (WAV/AIFF/FLAC/ALAC to WAV/AIFF/FLAC/ALAC, ISO/DFF/DSF to DSF)

    for output sample rate same to input.
    It is lossless conversion for change format only;

  • Non-optimized mode (passed non ristricted range 0 ... half sample rate).

    It's traditional resampling mode;

  • Optimized mode (passed ristricted range 0 ... 20-24 kHz).

    For improving playback quality via digital analog converter (DAC).

Optimizing audio for DAC




Audio optimization mode


Audio file content is [useful music signal (0 ... 20 kHz)] + [ultrasound (all upper 20 kHz)].
It showed at left part of picture.


In traditional (non-optimized) resampling mode AuI ConverteR 48x44 pass from input to output half of sample rate. It showed in upper right part of the picture.

Here sample rate is minimal between input and output.


Example #1: input sample rate is 48 kHz, output sample rate is 88 kHz. Here minimal sample rate is 48 kHz. Frequency band passed to output is 48 / 2 = 24 kHz

Example #2: input sample rate is 96 kHz, output sample rate is 44 kHz. Here minimal sample rate is 44 kHz. Frequency band passed to output is 44 / 2 = 22 kHz


While no proof what we listen upper 17 ... 20 kHz. I.e. we don't listen ultrasound.

In ideal case analog part of apparatus (DAC, amplifier) have no non-linear distortions. And music and ultrasound pass to ears as into played back audio file.

For real apparatus we have non-zero non-linear distortions. It lead to infiltration/shifting ultrasound content to audible frequency range.

It made ultrasound audible but distorted. This phenomenon called intermodulation distortions.

Of course, audible signal distorted too.

In optimized mode AuI ConverteR 48x44 remove inaudible (ultrasound) content.

It fix audibility of distorted ultrasound.

Necessity of Optimized mode applying depend on used software, hardware and audio file content.

Optimized mode used by AuI ConverteR as default. Can be changed to Traditional (Non-optimized) mode in settings.



How optimize audio file for DAC
May be your audio system can more
without hardware upgrade?
During playback DAC resample audio file content to DAC's internal ("native") resolution.
Low sample rates (44 or 48 kHz) upsampled for improving quality of digital to analog conversion.

Sound quality music defined by quality of filtration into digital analog converter (DAC).
Better quality filtration achieved for combined digital+analog filtration at high sample rates. As example: at 352 or 384 kHz.

Also possible downsampling to allowable maximal sample rate of DAC in driver or audio player.
"Slow" accurate re-sampling algorithms consume significant number of computing resources.

As rule hardware decisions limited in computing resources. There are time limitation due "on fly" processing.

After upsampling, file's audio quality is not improved by itself. DAC work in optimal mode. Improving of sound quality is not guaranteed, of course. It depend on many factors. However you can assess conversion result with AuI ConverteR 48x44 FREE.

AuI ConverteR (in optimized mode) helps DAC supress distortions for high sample rates.

Resource limitation may be solved via offline conversion on PC.
Audio conversion software allow pre-convert music files to "native" audio resolution of DAC via "slow" accurate math.

It's desirable if DAC have non-oversampling capability. Audio player should support unchanged ("bit perfect") transfer audio data from file to DAC.

Some DACs and players don't support such modes. Here possibly to try seek "best sounding" sample rate / bit depth of used system (software/hardware player+DAC or portable audio device). And further convert audio file to that resolution.

AuI ConverteR 48x44 provide pro studio level of quality near theoretical limits.

Try improve sound of your audio system.
Right now convert your files to "native" (usual maximal) DAC's sample rate with AuI ConverteR 48x44 FREE. And made sound check.
How offload inline conversion
Have you music playback
unstability and interruptings?
Optimization audio for playback (resampling) can be released via software/hardware player. The optimization demand significant computing resources for processing music "on fly".
It may be critical for some computers. Or take away the resources that simultaneously need other software.

Overload CPU lead to periodical interruptings of playback.

Interrupting may vary from almost hidden shortest to long pauses, clicks.
Pay attention to sound. Possibly reason of transparency decreasing in shortest almost inaudible interruptions.
For this case, decreasing quality of player's "on fly" processing may lead to improving sound quality in speakers.

Need balance between processing quality and computing load.
For avoiding interruptions used simpler math. It lead to some audio quality decreasing.

Sometimes impossible adjust processing quality for successful playback of certain files. As example, due absent necessary settings or processings's minimal requirements.

For offload computer during playback possibly accurate pre-convert files to native format of your DAC.
After it files will playback without spending computing resources for real-time audio conversion (if such mode allowed by your audio player).

Try fix music playback unstability and interruptings.
Convert with AuI ConverteR 48x44 FREE audio file to target sample rate (optimal for DAC) provided by your audio player.
Convert music for network server
Convert music to format compatible with network audio player or software player
Accurate prepare files to native audio format of your hardware with "heavy" exact processing
Convert music for mobile and car audio
Accurate convert high resolution music for vehicle and portable HiFi
Portable and vehicle audio can support limited range audio formats (type file, sample rate, bit-depth). Even this stereo support lossy formats only.
So you want convert home music library files with minimization of quality losses. For this fit high precision AuI ConverteR 48x44

Download AuI ConverteR 48x44 FREE for Windows
Download AuI ConverteR 48x44 FREE for Mac OS X

Convert input

Serial batch converting

Fast simultaneous (multi-CPU)
batch converting several files

Pause conversion ability

ANALOG emulating resampling mode
*All prices without EU VAT (added to price for EU only). Full comparing table of editions...

Download AuI ConverteR 48x44 FREE for Windows
Download AuI ConverteR 48x44 FREE for Mac OS X

Why AuI ConverteR 48x44?

Key Features

Confidence in audio quality
HiFi integrated audio file converter and CD ripper with affordable price (Lite and Audiophil-E editions)
Convert PCM to DSF (1-bit high resolution audio) file format.***
Convert input DSF and DFF files to WAV, FLAC (16 / 24 / 32*** bit), mp3, etc.*
Adjust volume of output file with precision 0.1 dB**
Sample rate and bit-depth conversion audio quality for FREE/Lite/Audiophil-E editions exactly the same most expensive AuI ConverteR 48x44 PROduce-RD used for HiEnd systems with cost more dozens thousands dollars

Audiophile Inventory's own high precision audio algorithms
alphaC - own AuI's high accurate sample rate and bit-depth conversion algorithm
alphaD - own AuI's gentle dithering algorithm
alphaS - own AuI's low distortion and noise sigma-delta modulation (DSF audio file format - 1-bit/D64/D128) algorithm***
Ease using and stability
Simple user interface easy even for novices: OPEN - select FORMAT - CONVERT
Safe, stable work
Time economy with full power of computer
Batch audio conversion with simultaneous (multi-CPU)* converting several files
Preserve metatags mp3, flac, wav, aiff, dsf*
Keep structure library during batch converting
Recreate structure of directories output files like input files (example: cd artist/cd album)
Convert multiple input format simultaneously to single output format
Adjust AuI for yourself
Flexible customization of codecs. As example, you can use favorite mp3 command line codec with user fiendly graphical interface of AuI ConverteR 48x44, adjust suitable conversion quality
Use AuI with other software
Use AuI ConverteR 48x44 as command line* conversion utility for other audio software
Compatible with latest operation systems
Support of latest versions of Windows and Mac OS X (including OS X Yosemite 10.10)
You are not alone with software
Reliable and fast technical support
* - for Audiophil-E edition and above
** - for PROduce-R edition and above
*** - for PROduce-RD edition

Press about AuI ConverteR 48x44


Roland Krammer
Crayon Audio GmbH
Republic of Austria,
AuI ConverteR 48x44
since 2012
...we use AuI ConverteR 48x44 software, so that we can provide right examples...

...The dither generated music data that sounded more fine then the original...
  "We do develop and built high end HiFi devices like integrated amplifier, power amplifier, phono preamplifier, pre amplfier, cd-player and audio streamer. We attach particular importance to maximum spatial resolution, but avoid the typical harshness sound in semiconductor amplifiers and digital equipment. ...

  Since our CD player can play FLAC encoded files up to 96KS, we use AuI ConverteR 48x44 software, so that we can provide right examples. ..."

  "...After many attempts to get my music data in the correct format, I discovered the positive characteristics of the dither function of AuI. I converted different music samples with dither. Burned the data with and without dither on CD and show this also to my colleagues in my branch. There was not one among them who could say something different as I'm. The original and the with the dither function converted samples sounded different.

The dither generated music data that sounded more fine then the original. The attacks in side instruments had more dynamic. The space was more clear. A decaying sound was to be heard longer, right down to the quietest passages. The whole sound had gained. But frequency analyzes indicated no difference, although you can hear differences. ..."

Steve Freedman,
AuI ConverteR 48x44
since 2014
I just upsampled Little Feat, "Waiting for Colombus," 1978 MSFL to 384 and all I can say is, WOW!!!...
  "I just upsampled Little Feat, "Waiting for Colombus," 1978 MSFL to 384 and all I can say is, WOW!!! Such a wonderful product you make... and on my droid it sounds great as well.. Thanks Yuri! Audiophile Inventory rocks!!!!!"
Martin Klaiss,
AuI ConverteR 48x44
since 2015
The cd ripper works perfect...the music played without any dropouts...
  "The cd ripper works perfect, yesterday i ripped a old cd that with other cd ripping software could not correct ripped, but by your software its perfect the music played without any dropouts."
Simon Pang,
Music lover
from Hong Kong,
AuI ConverteR 48x44
since 2015
...Finally, I have chosen AuI ConverteR, simply because I find the sound quality of the files converted by it is better than the other softwares that I have tried...
  "When I searched on the web to find software for converting my collections of DSF files to WAV or FLAC files to fit for my equipment setup, I found AUI ConverteR and some other softwares.

Before deciding to go for which one, I had compared the sound quality of the WAV files converted by these softwares. Finally, I have chosen AuI ConverteR, simply because I find the sound quality of the files converted by it is better than the other softwares that I have tried. In addition, it is also a nice experience to feedback my suggestions to the AUI developer for improvement and fixing issues. He always responds friendly and quickly.

I hope to continue to use it happily for my various conversion projects."
David Roush,
AuI ConverteR 48x44
since 2014
...AuI was one of the few converters that had the options I wanted, especially 32 bit...
  "I have spent a lot of money building a stereo system including a water-cooled media server. I have several thousand CDs that I am ripping. There is a big difference in sound quality between lossless uncompressed files (WAV) and lossless compressed files (WMA). I started with WMA due to the difference in file size compared to WAV. In the past, data storage was not inexpensive and 2 TB discs were the maximukm size you could buy. Now storage is getting cheaper and 4TB hard drives are becoming common. Now I am looking into converting the files to WAV.

It is becoming apparent that 32 bit is the way of the future, so no sense in buying software that does not handle 32 bit (same with a DAC). The AuI was one of the few converters that had the options I wanted, especially 32 bit.

About communication with Audiophile Inventory's team: Excellent and immediate responses."
Emil Serafino,
AuI ConverteR 48x44
since 2014
...So I find myself using Aul ConverteR all the time for multiple audio needs...
  "Infact I stumbled across your software while looking for a DSF to PCM converter for Windows before the RD version ever came out. I could only find Open Source Linux and Mac Software, one without a GUI and another with a very suspect one.
Best part about it is, IMO it is a superior sample rate and format converter than using my wave editor... So I find myself using Aul ConverteR all the time for multiple audio needs.
AuI ConverteR is an invaluable tool for converting my ... (1-bit HD audio disks [AuI's remark]) to lossless PCM WAV/AIFF or FLAC format so they can be interpreted by my non ... (1-bit HD audio [AuI's remark]) compatible ... 24/192 portable DAC and ... Headphone Amp for enjoying audiophile grade sound on the go."
Andrew Kruchinov,
music lover
AuI ConverteR 48x44
since 2013
...In previous versions there were "bugs" that the program developer fix fairly quickly...
  "I'm experienced music lover. Thus I prefer possible most qualitative of available formats.
   With the variety of free and paid converters for hi-res lossless files, high qualitive ones is unitary.

    I use AuI ConverteR 48x44 almost a year. In previous versions there were "bugs" that the program developer fix fairly quickly. What does the author's desire to constantly improve the software.
    All statements on the official website and the features of the software corresponds to the actual results obtained.

    Currently AuI ConverteR 48x44 is a priority program for converting of files. Especially for high-resolution audio.

    From my own experience I recommend use the software for all music lovers and interested professionals."
Hans Daudey
AuI ConverteR 48x44 pro
since 2011
...With a few mouse clicks I convert a directory map of flacs to a submap with converted files...
  "I use the AuI ConverteR 48x44 pro for the conversion of 192 khz / 24 bits flac files from ... to 96kHz / 24 bits flacs which are required for my ... (audio card [AuI's remark]). I use the default settings. With a few mouse clicks I convert a directory map of flacs to a submap with converted files. "
Sergey Bobrov
AuI ConverteR 48x44
since 2013
...Audiophile Inventory willingly and promptly responds to requests about found shortcomings...
  "AuI ConverteR 48x44 software is a unique tool. I like its quality of audio processing more than many well-known professional software products.

Audiophile Inventory willingly and promptly responds to requests about found shortcomings. Very quickly and efficiently fix it in newer versions."


about AuI ConverteR 48x44

I don’t heard before about AuI ConverteR. Why I must trust it?
You can download free version.
Functionality of FREE version has some restrictions: batch converting, as example (full comparing list of free and paid options see below).
But sound quality of FREE version is FULL. You can try it before buying.
AuI ConverteR permanently improved (new functionality and audio algorithms).
It's live project. You can see date and number latest version in page

Read opinions.
There are a lot free audio converters. Why me purchase audio converter?
You can use any free audio converter. It save your money.

But there is not ideal software:
- with full functionality,
- without bugs (errors of work),
- with actual codecs.
Sometime you need convert a lot files. But conversion it is impossible due bug of converter. It's real life, unfortunately :(

Often developers of free programs haven't time for technical support of each user (fix bugs, advices, release some suggestions and other).
You need to look for a new conversion software.

Sometime you need use several free utilities (command line also) for achieving of result.

With AuI ConverteR 48x44 you get:

1. User friendly integrated decision (CD converter + audio resolution converter + file format converter).

2. sureness in sound quality.

3. guaranteed technical support during 1 year after purchasing.

You can use your favorite command line tool with AuI ConverteR.
I can choose other non free audioconverter. Why me need purchase AuI ConverteR 48x44?

AuI ConverteR 48x44 is hi-end converter audio files
        for playback converted files on HIGH DEFINITION APPARATUS

hi-end apparatus

Also it's:
1. live project permanently tuned for modern demands,
2. integrated tool for multiformat audio conversion,
3. simple in using software with user friendly interface,
4. software with reliable and competent technical support.

What warranty I get with purchased software?

Owners of purchased versions have priority and guaranted service in Standard Warranty term.
Standard Warranty term for AuI ConverteR 48x44 is 1 year after date of purchasing.

Standard warranty AuI ConverteR 48x44

If you find a bug, simply write to technical support. We will fix the bug as soon as possible (usually 1-5 days).

Sometime bugs appear due corrupted source audio files or other circumstances beyond our control.
If it possible we try to learn AuI ConverteR 48x44 pass troubles of corrupted input files or other. Or find other decision.

You can ask any questions about AuI ConverteR software, get advices how use it and send us any suggestions for improving the software.

About updates of new versions read here.

Can I get new updates free?

If you purchased (as example) version 3.4 — you get all minor updates 3.x.x (as example: 3.4.1, 3.4.2, 3.5, …. , 3.8.1, ...) absolutelly free.

But version 4.0 and above (major updates - changing first digit of version number) you must purchase again.
It need for support of development of new functionality.

You can save money by purchasing Extra Warranty with AuI ConverteR 48x44 ($50, and Extra Warranty discount 10% for purchasing with AuI ConverteR 48x44 Audiophil-E or PROduce-R).

Term of Extra Warranty is 1 year after date of purchasing.
You get all updates (minor and major for purchased version - Audiophil-E, PROduce-R) absolutelly free. Major update appear usually 1 time per year.


1. BUGS finded by users (in warranty term) FIXED in MINOR updates.

2. If you owner of AuI ConverteR 48x44 PROduce-R with Extra Warranty — you get ANY NEW UPDATES absolutely FREE during term of Extra Warranty.

Extra Warranty AuI ConverteR 48x44

You can buy Extra Warranty with AuI ConverteR.
Into term of action of Extra Warranty, you can buy Extra Warranty for next year (after end of term of current Extra Warranty).

How uninstall AuI ConverteR 48x44

Under Windows

1. Open "Control panel"
2. Open Add or Remove Programs tool
3. Double click on row "Audiophile Inventory ConverteR 48x44"
4. Follow instructions of uninstall master.

Under Mac OS X

1. In Finder open folder "Application" (or other folder where you install AuI ConverteR 48x44)
2. Open context menu and select "Move to trash"

Order AuI ConverteR optimal for you

For upgrade contact us.

Comparison of Editions in Short

          Comparison in Details
from $22.1**

Configure options and order for saving budget >

Modula-R's modules are NOT compatible with Lite, Audiophil-E, PROduce-R, PROduce-RD.

You can upgrade your Modula-R in the future via ordering modules.

Minimal configurations:

  PCM to PCM
     WIN >    MAC >

  ISO to PCM
     WIN >    MAC >

  ISO to DSF
     WIN >    MAC >

     WIN >    MAC >

  PCM to DSF
     WIN >    MAC >

     WIN >    MAC >

  Safe CD ripper
     WIN >    MAC >

  Metadata editor
     WIN >    MAC >


  Ask for advice >


  Request for personal configuration >


  Configure / check price immediately >

 Free  Lite  Audiophil-E  PROduce-R  PROduce-RD

Comparison of Editions in Details






Output DSF D64/128/256/512 2 sec silence in middle file
≥ 3 min
Input DSF, DFF, ISO 2 sec silence in middle file
≥ 3 min



True Gapless Conversion        
FLAC/AIFF 32 bit        
Lossless formats WAV, FLAC, AIF, AIFF, AIFF/sowt, m4a (ALAC), APE
Lossy formats mp3, WMA, m4a, mp4, ogg and more
CD ripper get CD info from Internet 1 track
Input CUE + file    
Support meta tags (album and track name, artist, etc.)  
DSF, FLAC, WAV, AIFF tag editor
Batch processing of group of files 2 sec silence in middle output file:
- since 2 file for PCM to PCM,
- since 1 file for all other
Multiple files in parallel
Multichannel files (more 2 channels) output
≤ 3 min
Downmix 5.1 to stereo
Output volume adjust      
Inverting phase audio      
Input / output sample rates 352, 384 kHz WAV, AIFF, FLAC,...     WAV, AIFF, FLAC,... WAV, AIFF, FLAC,...
Output sample rates 705, 768 kHz WAV, AIFF     WAV, AIFF WAV, AIFF
Input / output sample rates 22, 44, 48, 88, 96, 176, 192 kHz
Bit-depth samples of input files: 16, 24, 32 (wav), 64 integer and 32, 64 floating point
Bit-depth samples of output files:  
        16 and 24 bit
        32 bit (wav)    
        32 bit (floating point)
        64 bit and 64 bit
          (floating point)
alphaC sample rate and bit-depth conversion algorithm
alphaD dithering algorithm
Audio processing 64-bit floating point
External format converters of files (download codec by demand, user can add own extensions) 9 only 9 only
Support extensible WAV-file's formats (sampler's notes, BWF - Broadcast Wave Format etc.)      
Support WAV 64-bit (RF64) format (size more 2 gigabyte)  
Search files by sample rate, bit-depth, format
No pre-ringing (minimum phase filter)
Launch via command Line    
Possible start more one instance of application simultaneously    
Additional skins, editing and creating custom skins  
Count skins   10 10 10
Commercial using  
Extra Warranty    

    *All prices without EU VAT and/or other applied taxes and/or local fees


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