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How to Convert ISO to FLAC on Mac OSX, Windows [Step-by-step Guide]

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Tutorials

Tutorial how to convert ISO to FLAC under Mac OSX, Windows to playback at audiophile music equipment. Here extraction from 1-bit audio ISO (a.k.a. SACD ISO) to FLAC is discussed only. Also watch video tutorial.
 

Tutorial: How to convert ISO to FLAC under Mac and Windows

 

WARNING: AuI ConverteR 48x44 don't support DVD-audio and DVD-video.

 

 

Prepare to conversion

 

Read about AuI ConverteR 48x44 configurations, that ISO to FLAC conversion capable >

To check sound quality download FREE demo version.

Read below about sound quality issues of the conversion of ISO to FLACs.

  1. Launch AuI ConverteR 48x44
  2. Open Settings > CD ripper/ISO tab (read below)
  3. Select stereo/multichannel target stuff - check/uncheck Force read stereo track switch, respectively
    (read details in Sound quality issues part of this article)
  4. Skip pause before first track: check Skip pause for first ISO track switch
  5. Skip pause between tracks: check Skip pause for all tracks switch
    Between tracks pauses may contains. Sometimes clicks contains into the pauses.
  6. Click OK button
  7. To convert live concert, opera and same albums: at the converter's main window > Parameters tab > check True gapless mode switch *

 

Read below about conversion sound quality issues.

 

 

Convert ISO to FLAC

 

  1. Open .iso file (1-bit resolution, a.k.a. SACD ISO, only).
    (if the ISO is converted first time or codecs were reset, codec auto downloading will requested)
  2. At the main window > Album art tab assign album artwork file. *
  3. At the main window select FLAC format.
  4. Select sample rate.
  5. Select bit depth.
  6. When target bit depth is 16 bit, dithering ON is recommended.
    (for higher resolutions Dither button will ignored)
  7. Select target directory. (watch video)
  8. Push Start button.
  9. Wait until end of conversion.
    (Converted stuff is placed in the target directory)

 

* if available in purchased AuI ConverteR's configuration (read details about ISO to FLAC capable configurations)

 

ISO FLAC converter: Set output format

Convert ISO to FLAC: Set output format

 

Assign artwork in target files: Album artwork panel

Album artwork panel

 

 

 

Sound quality issues

 

Conversion of ISO to FLAC is DSD demodulation. DSD demodulator is low frequency filter.

There is no strong standard of the filter to achieve proper result. Practically we can vary filtering band to achieve the best result at our equipment.

AuI ConverteR give 3 filter band optionally from 20 kHz to 100 kHz. Band width may be limited depending on input or output sample rates. Output sample rate limit target signal band.

Bit depth and sample rate of converted files may give different playback quality at your system. It is bound with different playback modes for combinations "bit depth + sample rate".

In general, you can convert to file in maximal sample rate and bit depth of your DAC. But it don't guarantee, that you get the best result. Read details about audio conversion and sound quality issues.

Extraction into PCM format perform downsampling. Downsampling processing based on filtering with varying settings.

At Settings > General tab > set Filter mode:

  • - "Optimized resampling filter" remove frequency range upper 20 kHz (ultrasound eliminating so that remove intermodulation distortions);
  • - "Non-Optimized resampling filter" suppress signal upper 20...24 kHz (defined by input/output sample rates) - ultrasound eliminating so that remove intermodulation distortions, wider signal band;
  • - "Non-Optimized wide resampling filter" suppress signal upper 20...100 kHz (defined by input/output sample rates) so that provide wider band of musical signal.

At some equipment software "Non-Optimized..." modes can cause audible noise, like here >.

Therefore "Optimized..." mode is recommended as first choice. However you can prefer other settings.

Use minimum phase filter switch checked/unchecked minimum/linear phase filtering in "Optimized..." mode. Other modes implemented as linear only.

Dithering is applied on extracting to 16 bit output resolution only. If target resolution is 24 bit and more (including float point), Dither button is ignored.

 


Tips and tricks

In the Settings > General tab:

  • FLAC compressing slider: set several compression levels. As rule, slider position altering give minimal effect. Central slider position is recommended. Level don't impact to sound quality.
     
  • Filter mode list: "Optimized resampling filter" is recommended. "Non-optimized ..." and "Non-optimized wide..." may cause noise and distortions.
     
  • Use minimum phase filter... switch unchecking is recommended.
     
  • Dithering mask depth... slider recommended set to most left position.
     

However, your individual choices may be other, than recommended here.

Read more about  sound quality issues >

 


 

Read more about stereo and multichannel ISO extraction >

 

Read educational articles about SACD ISO and FLAC audio files:

 

 

Converter ISOs to FLACs: Configurations

 

The converter have several available editions, that distinguish by functionality.

Read details about AuI ConverteR's configurations >

 

Tutorial video: How to Convert ISO to FLAC files

 

 

Tutorial video: Target Directory Management

 


Read more

Ripping SACD ISO media server

SACD ISO ripping PS3 console

FLAC site

 

 

Read more about ISO converters

 

  1. How to Convert ISO to DSF under Mac and Windows >
  2. How convert ISO to DSF WAV FLAC AIFF without clicks. User manual >
  3. Extract ISO to DSF PCM. Clicks Issues (4 parts) >
  4. How Faster Extract ISO Audio File >

 

 


Read other articles about audio and ripping issues
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