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How to Convert ISO to DSF WAV FLAC AIFF without Clicks. User Manual

Tutorials

There are some tricks for achieving better result of convertion of high resolution 1-bit audio disk image ISO to DSF, WAV, FLAC, AIFF, ... files. Here described instructions for converting ISO without clicks, that known to author, via AuI ConverteR 48x44. 100% ridding of clicks is not guaranteed. There are many click reasons. Each case demands individual approach.

Conversion ISO to DSF FLAC WAV AIFF. User manual

 

1. Conversion ISO to FLAC, WAV, AIFF and other PCM formats is supported by AuI ConverteR Audiophil-E, PROduce-R, PROduce-RD and configurable Modula-R.

2. Conversion ISO to DSF is supported by maximal PROduce-RD and configurable Modula-R.

 

Audio converter DFF to DSF Mac OS X, Windows

AuI ConverteR 48x44 download free



Download free HD audio converter AuI ConverteR 48x44 for high resolution music
WAV, FLAC, AIFF, ALAC, ISO, DFF, DSF, WMA, mp3,...

WARNING: Input DSF, DFF, ISO supported in Audiophil-E, PROduce-R and configurable Modula-R
Output DSF supported in maximal PROduce-RD and configurable Modula-R

 

Content

  1. Reasons of ISO conversion clicks
    1. Extracting ISO to DSF without last partitial block due some extraction software bug
      1. Why extract ISO to DSF (not DFF) is recommended?
      2. How to fix lost-audio-data-block-click issue during ISO to DSF extraction
    2. DC bias for some tracks
    3. Clicks in silence (pauses) between tracks
    4. How to eliminate clicks in album playback
    5. How to eliminate clicks in playback of separate tracks
    6. Audio player matter of playback clicks
  2. Ways of ISO conversion
    1. Bit perfect conversion
    2. Seamless resampling
    3. DC biased audio content conversion (Smooth DC mode)
  3. How extract stereo and multichannel ISO tracks
  4. How to remove pauses for tracks extracted from ISO
  5. Tutorials
    1. How to Convert ISO to FLAC under Mac and Windows
    2. How to Convert ISO to DSF under Mac and Windows
  6. Troubles
    1. What is mean log message "error: input file is compressed"
    2. What is mean log message "app e: libsacdread: Can't open X:/iso/Sample ?.iso for reading"
    3. What is mean log message "Error ISO conversion in log file: libsacdread: Not a ScarletBook disc! libsacdread: Can't read Master TOC"

 



Download free HD audio converter AuI ConverteR 48x44 for high resolution music
WAV, FLAC, AIFF, ALAC, ISO, DFF, DSF, WMA, mp3,...

WARNING: Input DSF, DFF, ISO supported in Audiophil-E, PROduce-R and configurable Modula-R
Output DSF supported in maximal PROduce-RD and configurable Modula-R


1. Reasons of ISO conversion clicks

  1. Extracting ISO to DSF without last partitial block due some extraction software bug
  2. DC bias for some tracks
  3. Troubles of playback software

 

1.1. Extracting ISO to DSF without last partitial block due some extraction software bug

It is well known trouble of sacd_extract software for ISO to DSF conversion.

Audio data in DSF audio file divided to blocks. And last block can be partially filled. Rest its space may be filled by zeroes. If last block is lost, non-lero level may be present at the end of track. It can cause click at the end of the track.

Some ISO contains uninterrupted stuff (like opera or live concert). Lost during extraction last block give burst of the ininterrupted original stuff. It may be listened as light but unpleasant click.

sacd_extract software extract audio content without the bursts / clicks for conversion ISO to DFF.

The software's developers inform that for v. 0.3.8 the issue is fixed: "fixed a bug where a DSF export truncated sample data".

1.1.1. Why extract ISO to DSF (not DFF) is recommended?

From end user's point of view no difference between DSF and DFF as audio data storage.

DSF file can contains metadata (album and track name, performer, album arts) in standard implementation. As rule, DSF metadata must be supported by audio playback software / hardware.

DFF file can contains metadata in non standard chunk (block). Same way used in WAV and AIFF for support id3 type of metadata. These metadata are stored into universal data block (chunk). Some software is able to read the block content. Other software ignore the block.

When sacd_extract convert ISO to DSF, it place available metadata to output DSF.

But some versions of the software extract DSFs with clicks due last audio data block issue.

 

1.1.2. How to fix lost-audio-data-block-click issue during ISO to DSF extraction

AuI ConverteR 48x44 solve the issue of the lost-audio-data-block click via next conversion workflow:

ISO -> DFF-file + CUE-file with metadata -> DSF with metadata from CUE-file

Solving of the issue of the lost-audio-data-block click

SACD ISO to DSF workflow

All it work transparently for user. Only need click Start button and wait for ready DSF.

For extracting 1-bit audio ISO without resampling, bit perfect conversion ISO to DSF is used.

 

 

1.2. DC bias for some tracks as click reason

Some ISO's audio tracks have DC bias. This bias may change into one album.

On the picture we can see bias rise gradually in right channel of first album track:

DC bias in right channel of first album track

DC bias ISO's track

In next track the bias remains constant. In the end of the last album track bias is decreased to zero gradually.

 

Clicks during playback of separate tracks

If such album is played back as continuous stream (without re-initialization playback software and hardware in begin of the track), track-border clicks won't be there.

Separate playback of the album track #1 can cause click at its end. Separate playback of the last album track can cause click at its begin.

Rest of tracks can cause clicks at its begin and end.

In picture showed DC bias of one of the tracks in the album middle. The bias can cause clicks at begin and end of the file in playback.

DC bias of one of the tracks in the album middle

DC bias in non-first track

 

1.3. Clicks in silence (pauses) between tracks

Pauses between tracks may contains clicks.

To remove the pauses:

  1. In main window of AuI ConverteR click Settings button.
  2. In Settings window click CD ripper/ISO tab.
  3. Set checked Skip pause for first ISO track switch.
  4. Set checked Skip pauses for all tracks switch.
  5. In Settings window click OK button.

 

1.4. How to eliminate clicks in album playback

Сoncert may be recorded as single audio file and divided to several tracks (files) to distribute on SACD, DVD, CD-audio.

Such album must played back as single stream. Such audio player functionality called as gapless playback.

To extract ISO without processing (resampling, altering volume, etc.), bit perfect conversion ISO to DSF is recommended. Extracted to DSF musical stuff is binary identical to audio data of ISO file.

To extract ISO with processing or to PCM (WAV, FLAC, AIFF,...), seamless conversion ISO is recommended. Therefore album track (separate files) integrity, as continuous stream, is provided after processing.

 

1.5. How to eliminate clicks in playback of separate tracks

To playback separate track without border clicks, Smooth DC processing may be recommended. However, SmoothDC is not recommended for continous albums (live concerts, operas, etc.). Because SmoothDC can cause short pauses on track borders.

More details in Audio player matter of playback clicks part.

 

1.6. Audio player matter of playback clicks

Files, that extracted from ISO in bit-perfect mode, played back on player with gapless playback ability, must not cause clicks.

If audio software or hardware player re-initialize DAC for each track, DC bias may be listened as click. To avoid such clicks Smooth DC processing is recommended.

DAC condition changing may cause clicks.

 

 



Download free HD audio converter AuI ConverteR 48x44 for high resolution music
WAV, FLAC, AIFF, ALAC, ISO, DFF, DSF, WMA, mp3,...

WARNING: Input DSF, DFF, ISO supported in Audiophil-E, PROduce-R and configurable Modula-R
Output DSF supported in maximal PROduce-RD and configurable Modula-R

 


2. Ways of ISO conversion

  • Bit perfect conversion
    binary audio content of extracted files is fully identical to ISO's audio data
     
  • Seamless resampling
    Audio content may be accurate adjusted offline to "the best sounding" sample rate of your DAC for avoiding upsampling "on fly" in audio player and/or hardware. Seamless resamplig allow to resample album with continuous audio content (opera, live concert, etc.) without artefacts at TRACK borders.
     
  • DC biased audio content conversion
    Some ISOs can contains DC bias for all tracks. The bias can cause clicks at track borders.   

 

2.1. Bit perfect conversion

For exact copying of ISO's binary audio content AuI ConverteR 48x44 support bit perfect conversion. It is possible identical input and output sample rates. For ISO it is 2.8 MHz (D64).

If you convert ISO to DSF in bit perfect mode, binary audio content of ISO's tracks will copied to DSF files without changes.

For providing gapless and clickless playback need audio player (software or hardware) that capable to gapless playback.

Bit-perfect conversion supported by maximal PROduce-RD and configurable Modula-R.

For bit perfect conversion Modula-R edition's "ISO extract (core)" module is enough.

 

Manage Bit Perfect Conversion mode

1. In main window of AuI ConverteR 48x44 click Settings button.

Settings for bit perfect conversion

2. Into Setting window click General tab.

3. Check Don't make DSP... and uncheck Smooth DC switches.

4. Click OK button in Settings window.

 

 

 

2.2. Seamless resampling (True Gapless Conversion)

This mode allow convert album audio files without transient processes at track borders.

Seamless (gapless) processing is digital signal processing without re-initializing for each track (audio file).

The border of merged neighbor album tracks

True Gapless Conversion

At the picture border of merged neighbor album tracks is shown.

At upper part of the picture tracks, converted without True gapless mode, are shown. There is noise splash (light vertical line) by transient process at border of tracks is shown.

At bottom part of the picture True Gapless Mode turned ON. There is no noise splash between neighbor tracks.

Transient process at track border can be almost invisible at oscillogram, but listened as light click.

For providing gapless playback capable audio player software and hardware are need.

True Gapless conversion supported by maximal AuI ConverteR PROduce-RD and configurable Modula-R.

 

True Gapless Conversion mode management

1. In main window of AuI ConverteR 48x44 click Parameters tab.

True Gapless Mode management

2. True Gapless Mode turned ON (checked switch) / OFF (unchecked switch).

3. In main window of AuI ConverteR 48x44 click Settings button.

Don't make DSP

4. Into Setting window click General tab.

5. Uncheck Don't make DSP... and Smooth DC switches.

6. Click OK button in Settings window.

 

True Gapless conversion supported by maximal AuI ConverteR PROduce-RD and configurable Modula-R.

True Gapless conversion mode work slower than usual parallel (multi-CPU) mode. Bacause album files must be processed sequentially for providing seamless transient between tracks.

 

 

 

2.3. DC biased audio content conversion (SmoothDC)

SmoothDC processing assigned for smoothing DC-bias clicks at begin and end of track (audio file).

If click located out of action time of SmoothDC, the click may be fixed via editing of converted audio file.

SmoothDC provided as additional gain control:

a) smooth and fast gain increasing in begin of track,

b) smooth and fast gain  decreasing in end of track.

It allow to reduce clicks, that located in time area of gain changing. However, the processing is not recommended for albums like operas, live concerts and same ones. Because it can cause short pauses between tracks.

Smoth DC processing may be recommended for such albums, if its tracks will played back separatelly.

 

Smooth DC at begin of the first album track only

If remove pause before the first track, at the first track begin non-zero level may appear. It can cause click at begin of the first track. Even for True Gapless conversion. True gapless mode need for resampling of operas, live concerts and other continuous albums. In this case SmoothDC processing is not recommended for borders between tracks. But SmoothDC may be applied at bigin of the first track only.

 

Smooth DC processing management

Smooth DC at begin and end every track

1. In main window of AuI ConverteR 48x44 click Settings button.

Settings for Smooth DC mode

2. Into Setting window click General tab.

3. Unheck Don't make DSP... and check Smooth DC switches.

4. Click OK button in Settings window.

 

Smooth DC at the begin of first album track only

1. At the main window of AuI ConverteR 48x44 click Settings button.

Settings for Smooth DC mode for first track

2. At the Setting window click General tab.

3. Unheck Don't make DSP... and check Smooth DC begin first track switches.

4. At the Settings window click OK button.

 

 


3. How extract stereo and multichannel ISO tracks

AuI ConverteR 48x44 can extract from ISO either stereo or multichannel track by user choise:

 

Stereo / multichannel track extraction mode management

1. At the main window of AuI ConverteR 48x44 click Settings button.

2. At the Setting window click CD ripper/ISO tab.

Stereo and multichannel ISO extraction

3. Select stereo or multichannel track extraction mode from ISO:

    3.1. To extract multichannel tracks uncheck Force read stereo track... switch.

    3.2. To extract stereo tracks check Force read stereo track... switch.

4. At the Settings window сlick OK button.

 

 

Since version 6.0.3 appear ability of extracting from ISO only selected kind of tracks: stereo or multichannel. If there are no selected kind of tracks, extracted nothing.

At Setting window click CD ripper/ISO tab look to Selected channel number only switch.

1. Stereo only: Selected channel number only switch checked (selected only), Force read stereo track... checked (stereo extraction):

1.1. If ISO contains 2.0 tracks only or 2.0 and 5.1, then stereo (2.0) tracks are extracted.

1.2. If ISO contains 5.1 tracks only, extracted nothing.

 

2. Multichannel only: Selected channel number only switch checked (selected only), Force read stereo track... unchecked (multichannel extraction):

2.1. If ISO contains 5.1 tracks only or 2.0 and 5.1, then multichannel (5.1) tracks are extracted.

2.2. If ISO contains 2.0 tracks only, extracted nothing.

 

3. Stereo or any available: Selected channel number only switch unchecked (any available), Force read stereo track... checked (stereo extraction):

3.1. If ISO contains 2.0 only or 2.0 and 5.1, then stereo tracks (2.0) are extracted.

3.2. If ISO contains 5.1 only, then multichannel tracks (5.1) are extracted.

 

4. Multichannel or any available: Selected channel number only switch unchecked (any available), Force read stereo track... unchecked (multichannel extraction):

4.1. If ISO contains 5.1 only or 2.0 and 5.1, then multichannel tracks (5.1) tracks are extracted.

4.2. If ISO contains 2.0 only,  stereo (2.0) tracks are extracted.

 

 


4. How to remove pauses for tracks extracted from ISO

AuI ConverteR 48x44 can skip pause before first track and pauses between tracks when extract audio files from ISO (supported by maximal PROduce-RD and configurable Modula-R)

 

Manage skipping pause before 1 track of ISO 1 bit audio file

1. In main window of AuI ConverteR 48x44 click Settings button.

2. Into Setting window click CD ripper/ISO tab.

How remove 2 second pause begin first ISO track

3. To skip pause before first track check Skip pause for first ISO track switch.

4. To skip pauses between all tracks check Skip pause for all track switch.

5. Length of skipped pause assigned at Pause, ms input field in milliseconds.

6. At Settings window сlick OK button.

 


6. Troubleshooting

6.1. What is mean log message "error: input file is compressed"

It is issue of obsolete versions of AuI ConverteR 48x44.

1. Download and re-install last version.

2. Reset input decoders.

3. Restart AuI ConverteR.

 


6.2. What is mean log message "app e: libsacdread: Can't open X:/iso/Sample ?.iso for reading"

It is issue of obsolete versions of AuI ConverteR 48x44. If in *.iso file path and/or name present non English symbols, rename this ISO file and/or its path so, that it contain English symbols only.

 


6.3. What is mean log message "Error ISO conversion in log file: libsacdread: Not a ScarletBook disc! libsacdread: Can't read Master TOC"

The message displayed for attempt of conversion DVD ISO on AuI ConverteR. Mount the ISO in virtual DVD drive. If there are audio_ts или video_ts, it is DSD image.


If it is SACD ISO, its structure may be damaged. In this case:

1. Install virtual DVD-RW drive software TotalMounter.
2. Install image burnig software ImgBurn.
3. In TotalMounter mount new DVD-RW drive.
4. In ImgBurn write ISO image (that have the displayed error) to the new virtual drive (keep verify on).
5. Open new created ISO image in AuI ConverteR and convert it.

 


Recommended:

Extract ISO to DSF PCM. Clicks Issues >

 



Download free HD audio converter AuI ConverteR 48x44 for high resolution music
WAV, FLAC, AIFF, ALAC, ISO, DFF, DSF, WMA, mp3,...

WARNING: Input DSF, DFF, ISO supported in Audiophil-E, PROduce-R and configurable Modula-R
Output DSF supported in maximal PROduce-RD and configurable Modula-R

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