{"id":1939,"date":"2020-09-17T23:38:57","date_gmt":"2020-09-17T23:38:57","guid":{"rendered":"http:\/\/mp4gain.com\/mp4gain\/?p=1939"},"modified":"2020-09-17T23:38:57","modified_gmt":"2020-09-17T23:38:57","slug":"audio-compression-facts-myths-and-a-blind-test","status":"publish","type":"post","link":"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/","title":{"rendered":"Audio compression: facts, myths, and a blind test"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/s3-ap-southeast-1.amazonaws.com\/2.0-plexxie.com\/media\/aemanda\/MTka8EfY7pGiUtXW7wYDDgVFDI4kDhgelPtR2JrM.png\" alt=\"Audio compression\" width=\"482\" height=\"297\" \/><\/p>\n<p>When compressing, for example with MP3, there is a loss. But do you hear that? Where does good hearing end and where does esotericism begin? We verify the theory with a blind test, which you can do yourself.<br \/>\nAudio compression is a constant part of everyday life &#8211; almost always when you listen to music, it gets compressed. However, audio signal processing is difficult to understand for people who do not work in this field and who have adequate basic training. Consequently, in my impression, most people do not care at all or demonize MP3 and everything that has to do with compression.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/encrypted-tbn0.gstatic.com\/images?q=tbn%3AANd9GcQrxQfMMqLPYjjCZ8Lo6dlwf8nm3au1iue4cQ&amp;usqp=CAU\" alt=\"MUSIC PRODUCTION WEEK: DAY 2, Compressor Tuesday: How to use compressors  and why? \u00e2\u0080\u0094 Steemit\" \/><\/p>\n<p>The question is: Are we depriving ourselves of a pleasant pleasure if we only listen to music on Spotify or YouTube? Or don&#8217;t you notice a difference with the best possible quality?<\/p>\n<p>Numbers and what they say<\/p>\n<p>Different measurement parameters say something about sound quality, but what exactly is it? The following is an overview of the factors as brief and clear as possible.<\/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\/audio-compression-facts-myths-and-a-blind-test\/#1_Bit_rate\" >1. Bit rate<\/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\/audio-compression-facts-myths-and-a-blind-test\/#2_Compression_method\" >2. Compression method<\/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\/audio-compression-facts-myths-and-a-blind-test\/#3_bit_depth\" >3. bit depth<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/#_4_Sampling_frequency\" >. \n4. Sampling frequency<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/#5_Other_factors\" >5. Other factors<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"1_Bit_rate\"><\/span>1. Bit rate<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Bit rate tells you how many bits are processed per second. It is also called data transfer speed or bandwidth.<\/p>\n<p>It makes intuitive sense: the more data that flows, the higher the sound quality. Bit rate is the most important measured variable in everyday life. However, the bitrate alone doesn&#8217;t say much about sound quality.<\/p>\n<p>There are variable and constant bit rates. Today variable bit rates (abbreviated VBR) are mainly used. In &#8220;little happens&#8221; passages, more data can be compressed without audible loss, whereas a relatively large amount of data is stored in complex passages. The result is higher sound quality with the same file size. In the case of variable bit rates, the average is given as a value, sometimes also the maximum allowed.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"2_Compression_method\"><\/span>2. Compression method<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>CAA compresses more efficiently than MP3, making it better quality than MP3 at the same bit rate. The same goes for Ogg Vorbis, which is used on Spotify.<\/p>\n<p>Also the compression software that Encoder, has an impact on the quality. In the early days of MP3, 128 kbit \/ s songs often sounded terrible. Now they sound so much better because bad encoders are no longer used.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"3_bit_depth\"><\/span>3. bit depth<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Bit depth tells you how many bits a sample has. Therefore, it is also called the sampling depth. The more bits per sample, the more different volume levels can be stored.<\/p>\n<p>This may remind you of photos and videos &#8211; there are bit depths too and they mean something similar.<\/p>\n<p>The LG V30 can record * 10-bit videos **. What is the point? A direct comparison with our system camera VIDEO<br \/>\nmobile background<br \/>\nThe LG V30 can record 10-bit videos. What is the point? A direct comparison with our system camera.<br \/>\nWhich is better: * RAW or JPEG? **<br \/>\nbackground photo + video<br \/>\nWhich is better: RAW or JPEG?<br \/>\nA CD has 16 bits per stereo channel. There is no fixed bit depth with MP3 and other compressed audio files. Bit depth hardly plays a role in normal everyday life, only in studio recordings. Sometimes 24-bit is also used there to get more out of the sound processing. However, in the end, the music is reduced to 16-bit because it can see the difference, according to acoustics experts I can&#8217;t hear anything.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"_4_Sampling_frequency\"><\/span>\n.<br \/>\n4. Sampling frequency<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The sample rate (also called the sample rate) is also irrelevant for normal music listeners. But it is important to understand how digital sound storage works in the first place. A CD has a sampling frequency of 44100 Hz or 44.1 kHz. Hertz is a unit of measurement that indicates something like &#8220;frequency per second&#8221;. In audio sampling, it means that the sound level is measured 44,100 times per second. The same applies here: when recording in the studio, higher values \u200b\u200bmake sense, but not in the final format.<\/p>\n<p>Nyquist&#8217;s theorem: Many people believe that digital music is fundamentally a loss compared to a &#8220;real&#8221; (analog) sound wave. These discussions began when the CD was invented and immediately ridiculed by audio snobs as inferior to the record. But that can be refuted. The Nyquiste Theorem states that an audio curve can be completely reconstructed from individual points without any loss if the sample rate is high enough. And it also says how high the rate should be: twice the bandwidth. Since the human ear reaches a maximum of 20,000 Hz, this bandwidth is roughly selected. Hence the sample rate of just over 40,000 Hz.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"5_Other_factors\"><\/span>5. Other factors<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>With all the technical measurement parameters, it should not be forgotten that the best values \u200b\u200bare useless if the sound is already badly recorded. For example, if the sound engineer has not set the volume level high enough, dynamism is lost. The recording starts to creak when it gets louder afterwards. If the level is too high, the result is even worse: the recording is cluttered, rattles and scratches. Or a dynamic compressor alienates the result. Bad recordings are ubiquitous on YouTube and are also sold on CDs, for example for very old studio recordings or live concert recordings.<\/p>\n<p>The quality of your headphones or speakers also has an influence. With faulty minijacks, you will barely hear a difference between 128 kbit \/ s MP3 and uncompressed music. Most likely with good boxes.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>When compressing, for example with MP3, there is a loss. But do you hear that? Where does good hearing end and where does esotericism begin? We verify the theory with a blind test, which you can do yourself. Audio compression is a constant part of everyday life &#8211; almost always when you listen to music, &hellip; <a href=\"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Audio compression: facts, myths, and a blind test&#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":[1],"tags":[27872,27873,24553,27884,27883,33005,27885,42110,27881,27878,27836,27882,18859,27887,27886,27868,27869,27870,27876,27877,27880,27874,42111,27892,27888,27890,27889,27895,27894,42112,27896,27900,27901,27902],"class_list":["post-1939","post","type-post","status-publish","format-standard","hentry","category-audio-video","tag-audio-compression-can-be-used-for","tag-audio-compression-can-be-used-for-mcq","tag-does-audio-compression-help","tag-how-audio-compression-is-carried-out-in-mp3","tag-how-audio-compression-works","tag-how-audio-file-compression-works","tag-how-compression-audio","tag-how-digital-audio-compression-works","tag-how-does-audio-compression-ratio-work","tag-how-does-audio-compression-work","tag-how-does-lossless-audio-compression-work","tag-how-does-lossy-audio-compression-work","tag-how-does-mp3-audio-compression-work","tag-how-to-hear-audio-compression","tag-how-to-use-audio-compression","tag-is-audio-compression-lossless","tag-what-are-audio-compression-format","tag-what-are-the-audio-compression-techniques","tag-what-does-audio-compression-do","tag-what-does-audio-compression-do-in-camtasia","tag-what-does-audio-compression-sound-like","tag-what-is-audio-compression","tag-what-is-audio-compression-and-decompression","tag-what-is-audio-compression-in-camtasia","tag-what-is-audio-compression-in-multimedia","tag-what-is-audio-compression-sonos","tag-what-is-audio-compression-used-for","tag-when-to-use-audio-compression","tag-when-was-audio-compression-invented","tag-which-audio-compression","tag-which-is-the-best-audio-compression-format","tag-who-invented-audio-compression","tag-why-audio-compression-is-needed","tag-why-use-audio-compression"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Audio compression: facts, myths, and a blind test - mp4gain.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Audio compression: facts, myths, and a blind test - mp4gain.com\" \/>\n<meta property=\"og:description\" content=\"When compressing, for example with MP3, there is a loss. But do you hear that? Where does good hearing end and where does esotericism begin? We verify the theory with a blind test, which you can do yourself. Audio compression is a constant part of everyday life &#8211; almost always when you listen to music, &hellip; Continue reading &quot;Audio compression: facts, myths, and a blind test&quot;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/\" \/>\n<meta property=\"og:site_name\" content=\"mp4gain.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/mp4gain\" \/>\n<meta property=\"article:published_time\" content=\"2020-09-17T23:38:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/s3-ap-southeast-1.amazonaws.com\/2.0-plexxie.com\/media\/aemanda\/MTka8EfY7pGiUtXW7wYDDgVFDI4kDhgelPtR2JrM.png\" \/>\n<meta name=\"author\" content=\"R. 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Arias\",\"@id\":\"https:\/\/mp4gain.com\/mp4gain\/#\/schema\/person\/36ffddda9988e565bd4a9013324ce2cc\"},\"headline\":\"Audio compression: facts, myths, and a blind test\",\"datePublished\":\"2020-09-17T23:38:57+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/\"},\"wordCount\":875,\"image\":{\"@id\":\"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/s3-ap-southeast-1.amazonaws.com\/2.0-plexxie.com\/media\/aemanda\/MTka8EfY7pGiUtXW7wYDDgVFDI4kDhgelPtR2JrM.png\",\"keywords\":[\"audio compression can be used for\",\"audio compression can be used for mcq\",\"does audio compression help\",\"how audio compression is carried out in mp3\",\"how audio compression works\",\"how audio file compression works\",\"how compression audio\",\"how digital audio compression works\",\"how does audio compression ratio work\",\"how does audio compression work\",\"how does lossless audio compression work\",\"how does lossy audio compression work\",\"how does mp3 audio compression work\",\"how to hear audio compression\",\"how to use audio compression\",\"is audio compression lossless\",\"what are audio compression format\",\"what are the audio compression techniques\",\"what does audio compression do\",\"what does audio compression do in camtasia\",\"what does audio compression sound like\",\"what is audio compression\",\"what is audio compression and decompression\",\"what is audio compression in camtasia\",\"what is audio compression in multimedia\",\"what is audio compression sonos\",\"what is audio compression used for\",\"when to use audio compression\",\"when was audio compression invented\",\"which audio compression\",\"which is the best audio compression format\",\"who invented audio compression\",\"why audio compression is needed\",\"why use audio compression\"],\"articleSection\":[\"Audio and video\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/\",\"url\":\"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/\",\"name\":\"Audio compression: facts, myths, and a blind test - mp4gain.com\",\"isPartOf\":{\"@id\":\"https:\/\/mp4gain.com\/mp4gain\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/s3-ap-southeast-1.amazonaws.com\/2.0-plexxie.com\/media\/aemanda\/MTka8EfY7pGiUtXW7wYDDgVFDI4kDhgelPtR2JrM.png\",\"datePublished\":\"2020-09-17T23:38:57+00:00\",\"author\":{\"@id\":\"https:\/\/mp4gain.com\/mp4gain\/#\/schema\/person\/36ffddda9988e565bd4a9013324ce2cc\"},\"breadcrumb\":{\"@id\":\"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/#primaryimage\",\"url\":\"https:\/\/s3-ap-southeast-1.amazonaws.com\/2.0-plexxie.com\/media\/aemanda\/MTka8EfY7pGiUtXW7wYDDgVFDI4kDhgelPtR2JrM.png\",\"contentUrl\":\"https:\/\/s3-ap-southeast-1.amazonaws.com\/2.0-plexxie.com\/media\/aemanda\/MTka8EfY7pGiUtXW7wYDDgVFDI4kDhgelPtR2JrM.png\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/mp4gain.com\/mp4gain\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Audio compression: facts, myths, and a blind test\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/mp4gain.com\/mp4gain\/#website\",\"url\":\"https:\/\/mp4gain.com\/mp4gain\/\",\"name\":\"mp4gain.com\",\"description\":\"Mp4 Gain Official Website\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/mp4gain.com\/mp4gain\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/mp4gain.com\/mp4gain\/#\/schema\/person\/36ffddda9988e565bd4a9013324ce2cc\",\"name\":\"R. 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. Linkedin\",\"sameAs\":[\"https:\/\/www.linkedin.com\/in\/ricardoariaszorrilla\/\"],\"url\":\"https:\/\/mp4gain.com\/mp4gain\/author\/mp4gain\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Audio compression: facts, myths, and a blind test - mp4gain.com","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/","og_locale":"en_US","og_type":"article","og_title":"Audio compression: facts, myths, and a blind test - mp4gain.com","og_description":"When compressing, for example with MP3, there is a loss. But do you hear that? Where does good hearing end and where does esotericism begin? We verify the theory with a blind test, which you can do yourself. Audio compression is a constant part of everyday life &#8211; almost always when you listen to music, &hellip; Continue reading \"Audio compression: facts, myths, and a blind test\"","og_url":"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/","og_site_name":"mp4gain.com","article_publisher":"https:\/\/www.facebook.com\/mp4gain","article_published_time":"2020-09-17T23:38:57+00:00","og_image":[{"url":"https:\/\/s3-ap-southeast-1.amazonaws.com\/2.0-plexxie.com\/media\/aemanda\/MTka8EfY7pGiUtXW7wYDDgVFDI4kDhgelPtR2JrM.png","type":"","width":"","height":""}],"author":"R. Arias","twitter_card":"summary_large_image","twitter_creator":"@mp4gain","twitter_site":"@mp4gain","twitter_misc":{"Written by":"R. Arias","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/#article","isPartOf":{"@id":"https:\/\/mp4gain.com\/mp4gain\/audio-compression-facts-myths-and-a-blind-test\/"},"author":{"name":"R. 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