{"id":379,"date":"2019-09-03T19:49:01","date_gmt":"2019-09-03T19:49:01","guid":{"rendered":"http:\/\/mp4gain.com\/mp4gain\/?p=379"},"modified":"2019-09-03T19:49:01","modified_gmt":"2019-09-03T19:49:01","slug":"how-mp3-files-work","status":"publish","type":"post","link":"https:\/\/mp4gain.com\/mp4gain\/how-mp3-files-work\/","title":{"rendered":"How MP3 files work"},"content":{"rendered":"<p>The MP3 movement is one of the most incredible phenomena that the music industry has ever seen. Unlike other similar phenomena, such as the introduction of cassette tape or CD, MP3 technology did not start with the industry, but with a huge audience of music lovers on the Internet. The digital MP3 music format has had, and will continue to have a great impact on how people collect, listen and distribute the music.<\/p>\n<p>If you have wondered how MP3 files work, or simply want to know what uses can be given, read on. This article will give some features of this popular sound format.<\/p>\n<p><a href=\"http:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2019\/09\/1200x630bb.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-380\" src=\"http:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2019\/09\/1200x630bb-300x300.png\" alt=\"\" width=\"300\" height=\"300\" srcset=\"https:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2019\/09\/1200x630bb-300x300.png 300w, https:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2019\/09\/1200x630bb-150x150.png 150w, https:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2019\/09\/1200x630bb.png 630w\" sizes=\"auto, (max-width: 300px) 85vw, 300px\" \/><\/a><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mp4gain.com\/mp4gain\/how-mp3-files-work\/#MP3_format\" >MP3 format<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mp4gain.com\/mp4gain\/how-mp3-files-work\/#Compression_and_quality\" >Compression and quality<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mp4gain.com\/mp4gain\/how-mp3-files-work\/#Using_the_MP3_format\" >Using the MP3 format<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"MP3_format\"><\/span>MP3 format<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If you know something about how CD\u2019s work, then you know how they store music. A CD stores a song in the form of digital information. The data on a CD uses a decompressed high resolution format. This is what happens when a CD is created:<\/p>\n<p>The music is sampled (fractionated) 44,100 times per second. Each of these parts has a size of 16 bits.<br \/>\nPieces of these fractions or \u201csamples\u201d are taken from the left and right channels in a stereo system.<br \/>\nWith a simple formula we realize how great a single song can be.<\/p>\n<p><strong>Fractions * bits * channels = X bits per second<\/strong><\/p>\n<p>In our case it would be 44,100 for 16 bits per 2 channels, which would give us 1,411,200 bits per second. 1.4 million bits per second equals 176,000 bytes per second. If the average of a song is 3 minutes, then the average of a song on a CD is 32 million bytes of space. That is a lot of space for a song, and it is especially great if we consider that we are downloading music with a 56K Modem, which will take us a few hours.<\/p>\n<p>The MP3 format is a compression system for music. This format allows you to reduce the number of bytes in a song without damaging the sound quality. The goal of the MP3 format is to compress a CD quality song without letting you see the difference. With MP3, a 32 MB song from a CD, compresses up to 3 MB. This allows you to download a song in minutes instead of hours, and store hundreds of songs on your computer&#8217;s hard drive.<\/p>\n<p><a href=\"http:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2019\/09\/2d36ec12b8111dfced718b79909dc833_screen.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-381\" src=\"http:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2019\/09\/2d36ec12b8111dfced718b79909dc833_screen-300x300.png\" alt=\"\" width=\"300\" height=\"300\" srcset=\"https:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2019\/09\/2d36ec12b8111dfced718b79909dc833_screen-300x300.png 300w, https:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2019\/09\/2d36ec12b8111dfced718b79909dc833_screen-150x150.png 150w, https:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2019\/09\/2d36ec12b8111dfced718b79909dc833_screen.png 464w\" sizes=\"auto, (max-width: 300px) 85vw, 300px\" \/><\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Compression_and_quality\"><\/span>Compression and quality<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Is it possible to compress a song without damaging the quality? To perform this compression, the use of algorithms is needed, in the same way that we use them to compress other formats, such as graphics, text files, applications, etc. A very popular algorithm for compressing sound is the &#8220;perceptual noise shaping&#8221; technique. This algorithm uses characteristics of the human ear such as:<\/p>\n<p>There are certain sounds that the human ear cannot hear.<br \/>\nThere are certain sounds that the human ear hears better than others.<br \/>\nIts there are two sounds playing at the same time, we can hear the one that is louder, and not the lowest.<br \/>\nUsing factors like these, certain parts of the song can be eliminated without significantly damaging the quality of the song for the listener. When you have created the MP3 file, what you have is music with a quality close to that of a conventional CD. It doesn&#8217;t sound exactly the same because some things have been removed, but it&#8217;s very close.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Using_the_MP3_format\"><\/span>Using the MP3 format<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The MP3 movement &#8211; consisting of the MP3 format itself and the ability of websites to distribute it &#8211; have done several things in the music world:<\/p>\n<p>It has made it easy for anyone to distribute music at a low cost, or even for free.<br \/>\nIt has made accessing music simple and instant.<br \/>\nHe has taught people to manipulate music on a computer.<br \/>\nOne of the strengths of this format is the ability to edit, create and modify music files thanks to powerful computer software tools. Thanks to these tools, it is extremely easy for anyone:<\/p>\n<p>Download an MP3 file from a website and play it instantly.<br \/>\nTransform or \u201crip\u201d a song from a CD, to the MP3 format, and listen to it later.<br \/>\nRecord a song yourself, convert it to MP3, and make it available to everyone on the Internet.<br \/>\nConvert MP3 files into CD files and make your own audio CD&#8217;s with MP3 files downloaded from the Internet.<br \/>\nHave thousands of hours of music stored on one or more hard drives.<br \/>\nUpload MP3 files to portable players and listen to them wherever you want.<br \/>\nTo do all this, all you need is a computer with a sound card, speakers, an Internet connection, a CD \/ DVD player \/ recorder, and an MP3 player.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The MP3 movement is one of the most incredible phenomena that the music industry has ever seen. Unlike other similar phenomena, such as the introduction of cassette tape or CD, MP3 technology did not start with the industry, but with a huge audience of music lovers on the Internet. The digital MP3 music format has &hellip; <a href=\"https:\/\/mp4gain.com\/mp4gain\/how-mp3-files-work\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;How MP3 files work&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[482,486,484,481,4249,6565,488],"tags":[6306,1964,4470,6642,6584,6073,630,6583,6640,5851,194,5331,5373,5357,6233,6312,556,6641,5536,6026,5889,6299,259,600,1446,959,86,80,6582,11,6580,6581],"class_list":["post-379","post","type-post","status-publish","format-standard","hentry","category-flac-normalizer-2","category-flv-volume-normalizer","category-m4a-itunes-normalizer","category-mp3-normalizer-2","category-mp3gain-2","category-mp3gain-online","category-mp4-2","tag-audio-increaser","tag-audio-normalization-software","tag-best-mp3-normalizer","tag-best-mp3-volume-normalizer-windows-10","tag-change-pitch-software","tag-decrease-mp3-volume-online","tag-download-mp4gain","tag-fix-mp3-file","tag-how-to-normalize-mp3-files-to-play-at-the-same-volume","tag-increase-audio-volume-online","tag-mp3-gain","tag-mp3-normalizer-free","tag-mp3-normalizer-online","tag-mp3-volume-booster-online-free","tag-mp3-volume-booster-software","tag-mp3-volume-changer","tag-mp3-volume-normalizer","tag-mp3-volume-normalizer-android","tag-mp3-volume-normalizer-online","tag-mp3-volume-normalizer-windows-10","tag-mp3-volume-normalizer-windows-7","tag-mp3gain-windows-10","tag-mp4-audio-gain","tag-mp4-gain-volume","tag-mp4-lautstarke-normalisieren","tag-mp4-normalisieren","tag-mp4-volume-normalizer","tag-mp4gain-full","tag-mpp3-songs","tag-normalizes-video-sound","tag-online-mp3-compressor","tag-pc-sound-booster-software"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How MP3 files work - mp4gain.com<\/title>\n<meta name=\"description\" content=\"MP3 format: If you know something about how CD\u2019s work, then you know how they store music. 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A CD stores a song in the form of digital information. 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Arias","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/8ca03263e87418cfde07c571c83fa172297ce230085e4f181b9e5f9af745d6be?s=96&d=blank&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/8ca03263e87418cfde07c571c83fa172297ce230085e4f181b9e5f9af745d6be?s=96&d=blank&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/8ca03263e87418cfde07c571c83fa172297ce230085e4f181b9e5f9af745d6be?s=96&d=blank&r=g","caption":"R. Arias"},"description":"R. Arias is the author of this article and has extensive experience for more than 30 years as a recording engineer and audio specialist, as well as more than 20 years of experience creating algorithms related to audio and video. 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