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Compressed audio optical disc
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<p>A compressed audio optical disc, MP3 CD, or MP3 CD-ROM or MP3 DVD is an <a href="/facts/Optical_disc/vjVDB1GH">optical disc</a> (usually a <a href="/facts/CD-R/yjBjpaIM">CD-R</a>, <a href="/facts/CD-RW/W7THUREl">CD-RW</a>, <a href="/facts/DVD-R/HAFThLD3">DVD-R</a> or <a href="/facts/DVD-RW/HAFThLD3">DVD-RW</a>) that contains <a href="/facts/Digital_audio/PgugcLAI">digital audio</a> in the <a href="/facts/MP3/yrBpxUSD">MP3</a> <a href="/facts/File_format/qrXbwJaH">file format</a>. Discs are <a href="/facts/Optical_disc_authoring/Hu8wb5C9">written</a> in the "<a href="/facts/Rainbow_Books/vn52dP0N">Yellow Book</a>" standard data format (used for <a href="/facts/CD-ROM/JwuaYLJv">CD-ROMs</a> and <a href="/facts/DVD-ROM/7fJsHJrN">DVD-ROMs</a>), as opposed to the Red Book standard audio format (used for <a href="/facts/Compact_Disc_Digital_Audio/FDMqNLw5">CD-DA</a> audio CDs). </p>