View source for Adaptive Transform Acoustic Coding

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|subcat=Audio and Music
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== Description ==

Adaptive Transform Acoustic Coding (ATRAC) is a family of proprietary audio compression algorithms created by Sony. It was designed to meet the need for the [[MiniDisc]] format to maintain high sound quality and a 74 minute playing time, despite having considerably less storage space than an [[CD-DA|Audio CD]].

A number of improved versions of ATRAC have been released since [[ATRAC1]] (1992) - ATRAC3 (1999), ATRAC3plus (2002), [[ATRAC Advanced Lossless]] (2006).

Per [http://blog.washingtonpost.com/fasterforward/2007/08/sony_connect_atrac_exit_the_st.html this] Washington Post article, Sony has largely dropped support for ATRAC, although it is not clear to what extent. The [[PlayStation 3]] supports playback of ATRAC3plus and [[ATRAC Advanced Lossless]] files, and the [http://en.wikipedia.org/wiki/Adaptive_Transform_Acoustic_Coding Wikipedia article] suggests that some support remains in Japan.

== Information ==

* [http://www.minidisc.org/aes_atrac.html ATRAC: Adaptive Transform Acoustic Coding for MiniDisc] - a description of the psychoacoustic principles, encoder and decoder for the original ATRAC format
* [https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/atrac1.c Source] for FFmpeg's [[ATRAC1]] compatible decoder
* [https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/atrac3.c Source] for FFmpeg's ATRAC3 compatible decoder
* [https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/atrac3plus.c Source] for FFmpeg's ATRAC3plus compatible decoder
* [https://github.com/dcherednik/atracdenc LGPL implementation of ATRAC1, ATRAC3 encoders]

== Software ==

* [[FFmpeg]] has decoders for ATRAC, ATRAC3 and ATRAC3plus
* [http://www.sony.co.uk/support/en/content/cnt-tut/shared/convert-atrac-to-mp3 A suite of tools] for converting ATRAC to [[MP3]]
* [http://www.sony-asia.com/support/download/60444 SonicStage v4.3,] which supports ATRAC3 / 3plus and [[ATRAC Advanced Lossless]]

== Links ==

* [https://support.us.playstation.com/app/answers/detail/a_id/358/~/enable-ps3-atrac-audio-playback PlayStation Knowledge Centre - Enable PS3 ATRAC Audio Playback]
* [http://blog.washingtonpost.com/fasterforward/2007/08/sony_connect_atrac_exit_the_st.html Faster Forward - Sony Connect, ATRAC Exit the Stage]
* [https://www.techdirt.com/articles/20070830/094137.shtml Techdirt - Sony Finally (Really) Dumps Proprietary ATRAC Format No One Wanted For Its Walkmen]
* [https://web.archive.org/web/20070905010224/http://news.sel.sony.com/en/press_room/consumer/portable_audio/walkman_players/release/31221.html Sony Drops ATRAC Press Release Aug 30, 2007]
* [https://web.archive.org/web/20060421171143/https://www.sony.net/Products/ATRAC3/ Sony Global - ATRAC3 product page]

[[Category:Sony]]