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Safe Audio CD Ripping Technology

Audio Basis - educational articles

Safe audio CD ripping technology is reading audio CD tracks with improved steadiness to errors that can appear by different reasons.

Safe CD ripping technology

 

In the article "safety" mean "steadiness to error reading".

"Unsafe" rippers may have next kinds of behavior:
1. Read without error reporting, and/or
2. Rip with error first time. For repeat CD ripping without ejecting: successfully read without error report, but with errors in audio data.
3. Don’t try recovery audio data.


In general, safe ripping technology is:

1. Re-reading CD's audio data fragments

2. Reading error markers (C2)

3. Processing data obtained in points 1. and 2.

Result of the processing is detected and/or probably fixed error.

Some CD rippers provide this algorithm. Including open source.

Result can depend on implementation the algorithm.



In AuI ConverteR 48x44 CD ripper applied:

1. Raw binary reading from CD

2. CD builtin error control (C2)

     Each byte of raw audio stream under control.

3. Re-reading several times for each fragment of CD's audio data

    Re-reading may cause different result of reading due optical-mechanical factors.

    Also accounted sutuation when CD reading devices may always use builtin cache.

    AuI ConverteR provide special way of reading that try pass by such kind of cache.


4. Complex statistical processing full volume of information extracted from CD

     It allow detect errors and try to restore original information.


As result AuI ConverteR show results of ripping:

    - Fatal errors number (what it can't restore)

    - Probably restored bytes number


This algorithm currently work under Mac OS X and Windows.

 

We suppose, what new algorithm (already released under Mac OS X) give us more possibilities for control under ripping and for releasing of new ideas what we have and continue research currently.

For testing used as manufactured by third party audio CDs as own produced test CDs with different degree of damaging.

Own produced test CDs have exactly known binary content. It give full control of CD ripping quality. Content of ripped lossless files (WAV, FLAC, AIFF) compare with original binary data.

 

Example of CD ripper with safe audio ripping technology



 

Resume:

Complex processing (multiple readed CD's raw binary audio data and error markers) allow to check audio binary data integrity and try to restore damaged content in autonomous mode.

Restoring possibility especially actual for rare CDs.

 

Read more:

What is the Best CD Ripper Software? How to Compare Audio CD Rippers >>

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How to Improve Sound Quality

Tutorials

In this article term "to improve sound quality" mean "to decrease sound playback distortions at analog output of digital-analog converter". How to try to decrease the playback distortions for used equipment or portable device (digital audio player, mobile phone, etc.) will be considered below.

AuI ConverteR 48x44 - Free Music Converter
AuI ConverteR 48x44 - Free Audio Converter

AuI ConverteR 48x44 is pro audio converter of music files DSF, DFF, ISO (1-bit audio), FLAC, WAV, AIFF, m4a, CD-audio, CUE, APE, ogg, mp3. The converter is intended for music production and audiophiles.

AuI ConverteR 48x44 FREE may be used as free audio converter for Windows and Mac OS X. There is professional digital audio processing (altering resolution - sample rate, bit depth and dithering) of audio files is provided.

Read more...
 
 

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