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CD ripper

A CD ripper, CD grabber, or CD extractor is software that rips raw digital audio in Compact Disc Digital Audio (CD-DA) format tracks on a compact disc to standard computer sound files, such as WAV or MP3.

fre:ac, a CD extractor and audio converter

A more formal term used for the process of ripping audio CDs is digital audio extraction (DAE).

History edit

In the early days of computer CD-ROM drives and audio compression mechanisms (such as MP2), CD ripping was considered undesirable by copyright holders, with some attempting to retrofit copy protection into the simple ISO9660 standard. As time progressed, most music publishers became more open to the idea that since individuals had bought the music, they should be able to create a copy for their own personal use on their own computer. This is not yet entirely true; even with some current digital music delivery mechanisms, there are considerable restrictions on what an end user can do with their paid for (and therefore personally licensed) audio. Windows Media Player's default behavior is to add copy protection measures to ripped music, with a disclaimer that if this is not done, the end user is held entirely accountable for what is done with their music. This suits most users who simply want to store their music on a memory stick, MP3 player or portable hard disk and listen to it on any PC or compatible device.

Etymology edit

The Jargon File entry for rip notes that the term originated in Amiga slang, where it referred to the extraction of multimedia content from program data.[1]

Design edit

As an intermediate step, some ripping programs save the extracted audio in a lossless format such as WAV, FLAC, or even raw PCM audio. The extracted audio can then be encoded with a lossy codec like MP3, Vorbis, WMA or AAC. The encoded files are more compact and are suitable for playback on digital audio players. They may also be played back in a media player program on a computer.

Most ripping programs will assist in tagging the encoded files with metadata. The MP3 file format, for example, allows tags with title, artist, album and track number information. Some will try to identify the disc being ripped by looking up network services like AMG's LASSO, FreeDB, Gracenote's CDDB, GD3 [1] or MusicBrainz, or attempt text extraction if CD-Text has been stored.

Some all-in-one ripping programs can simplify the entire process by ripping and burning the audio to disc in one step, possibly re-encoding the audio on-the-fly in the process.

Some CD ripping software is specifically intended to provide an especially accurate or "secure" rip, including Exact Audio Copy, cdda2wav, CDex and cdparanoia.

Compact disc seek jitter edit

In the context of digital audio extraction from compact discs, seek jitter causes extracted audio samples to be doubled-up or skipped entirely if the Compact Disc drive re-seeks. The problem occurs because the Red Book does not require block-accurate addressing during seeking.[a] As a result, the extraction process may restart a few samples early or late, resulting in doubled or omitted samples. These glitches often sound like tiny repeating clicks during playback. A successful approach to correction in software involves performing overlapping reads and fitting the data to find overlaps at the edges. Most extraction programs perform seek jitter correction. CD manufacturers avoid seek jitter by extracting the entire disc in one continuous read operation, using special CD drive models at slower speeds so the drive does not re-seek.

Optical drive properties edit

Properties of an optical drive helping in achieving a perfect rip are a small sample offset (at best zero), no jitter, no or deactivatable caching, and a correct implementation and feed-back of the C1 and C2 error states. There are databases listing these features for multiple brands and versions of optical drives. Also, EAC has the ability to autodetect some of these features by a test-rip of a known reference CD.[2]

Examples edit

Notable CD ripper applications include the following ones:

BSD and Linux
Mac OS X
Windows

See also edit

Notes edit

  1. ^ Due to additional sector level addressing added in the Yellow Book, CD-ROM data discs are not subject to seek jitter.

References edit

  1. ^ . The Jargon File (version 4.4.3). catb.org. 2003-07-01. Archived from the original on 2009-02-24.
  2. ^ DAE Drive Features Database - FAQ 2006-01-16 at the Wayback Machine (2007)
  3. ^ "cdparanoia".
  4. ^ "fre:ac".

External links edit

  • "Recommended Secure Digital Audio Extraction software". from the original on 2013-05-18.
  • "Comparison of CD rippers". Retrieved 2021-07-19.

ripper, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, july, 2009, learn, . This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources CD ripper news newspapers books scholar JSTOR July 2009 Learn how and when to remove this message A CD ripper CD grabber or CD extractor is software that rips raw digital audio in Compact Disc Digital Audio CD DA format tracks on a compact disc to standard computer sound files such as WAV or MP3 fre ac a CD extractor and audio converter A more formal term used for the process of ripping audio CDs is digital audio extraction DAE Contents 1 History 2 Etymology 3 Design 4 Compact disc seek jitter 5 Optical drive properties 6 Examples 7 See also 8 Notes 9 References 10 External linksHistory editIn the early days of computer CD ROM drives and audio compression mechanisms such as MP2 CD ripping was considered undesirable by copyright holders with some attempting to retrofit copy protection into the simple ISO9660 standard As time progressed most music publishers became more open to the idea that since individuals had bought the music they should be able to create a copy for their own personal use on their own computer This is not yet entirely true even with some current digital music delivery mechanisms there are considerable restrictions on what an end user can do with their paid for and therefore personally licensed audio Windows Media Player s default behavior is to add copy protection measures to ripped music with a disclaimer that if this is not done the end user is held entirely accountable for what is done with their music This suits most users who simply want to store their music on a memory stick MP3 player or portable hard disk and listen to it on any PC or compatible device Etymology editThe Jargon File entry for rip notes that the term originated in Amiga slang where it referred to the extraction of multimedia content from program data 1 Design editAs an intermediate step some ripping programs save the extracted audio in a lossless format such as WAV FLAC or even raw PCM audio The extracted audio can then be encoded with a lossy codec like MP3 Vorbis WMA or AAC The encoded files are more compact and are suitable for playback on digital audio players They may also be played back in a media player program on a computer Most ripping programs will assist in tagging the encoded files with metadata The MP3 file format for example allows tags with title artist album and track number information Some will try to identify the disc being ripped by looking up network services like AMG s LASSO FreeDB Gracenote s CDDB GD3 1 or MusicBrainz or attempt text extraction if CD Text has been stored Some all in one ripping programs can simplify the entire process by ripping and burning the audio to disc in one step possibly re encoding the audio on the fly in the process Some CD ripping software is specifically intended to provide an especially accurate or secure rip including Exact Audio Copy cdda2wav CDex and cdparanoia Compact disc seek jitter editIn the context of digital audio extraction from compact discs seek jitter causes extracted audio samples to be doubled up or skipped entirely if the Compact Disc drive re seeks The problem occurs because the Red Book does not require block accurate addressing during seeking a As a result the extraction process may restart a few samples early or late resulting in doubled or omitted samples These glitches often sound like tiny repeating clicks during playback A successful approach to correction in software involves performing overlapping reads and fitting the data to find overlaps at the edges Most extraction programs perform seek jitter correction CD manufacturers avoid seek jitter by extracting the entire disc in one continuous read operation using special CD drive models at slower speeds so the drive does not re seek Optical drive properties editProperties of an optical drive helping in achieving a perfect rip are a small sample offset at best zero no jitter no or deactivatable caching and a correct implementation and feed back of the C1 and C2 error states There are databases listing these features for multiple brands and versions of optical drives Also EAC has the ability to autodetect some of these features by a test rip of a known reference CD 2 Examples editNotable CD ripper applications include the following ones BSD and Linux Asunder Cdda2wav cdparanoia fre ac Grip K3b Ripit Sound Juicer VLC media player ABCDE Mac OS X cdparanoia 3 fre ac 4 iTunes VLC media player Windows Audiograbber CDex Exact Audio Copy foobar2000 fre ac iTunes JRiver Media Center MediaMonkey Musicmatch Jukebox VLC media player Winamp Windows Media PlayerSee also editDVD ripper Hard disk recorderNotes edit Due to additional sector level addressing added in the Yellow Book CD ROM data discs are not subject to seek jitter References edit rip The Jargon File version 4 4 3 catb org 2003 07 01 Archived from the original on 2009 02 24 DAE Drive Features Database FAQ Archived 2006 01 16 at the Wayback Machine 2007 cdparanoia fre ac External links edit Recommended Secure Digital Audio Extraction software Archived from the original on 2013 05 18 Comparison of CD rippers Retrieved 2021 07 19 Retrieved from https en wikipedia org w index php title CD ripper amp oldid 1194490643, wikipedia, wiki, book, books, library,

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