forked from serjIII/threejsSDK
-
Notifications
You must be signed in to change notification settings - Fork 0
/
AudioContext(1).html
110 lines (108 loc) · 67.1 KB
/
AudioContext(1).html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
<!doctype html><html lang="en-US" prefix="og: https://ogp.me/ns#"><head><meta charset="utf-8"/><meta name="viewport" content="width=device-width,initial-scale=1"/><link rel="icon" href="/favicon-48x48.cbbd161b.png"/><link rel="apple-touch-icon" href="/apple-touch-icon.6803c6f0.png"/><meta name="theme-color" content="#ffffff"/><link rel="manifest" href="/manifest.56b1cedc.json"/><link rel="search" type="application/opensearchdescription+xml" href="/opensearch.xml" title="MDN Web Docs"/><title>AudioContext - Web APIs | MDN</title><link rel="alternate" title="AudioContext" href="https://developer.mozilla.org/fr/docs/Web/API/AudioContext" hreflang="fr"/><link rel="alternate" title="AudioContext" href="https://developer.mozilla.org/ja/docs/Web/API/AudioContext" hreflang="ja"/><link rel="alternate" title="AudioContext" href="https://developer.mozilla.org/ko/docs/Web/API/AudioContext" hreflang="ko"/><link rel="alternate" title="AudioContext" href="https://developer.mozilla.org/pt-BR/docs/Web/API/AudioContext" hreflang="pt"/><link rel="alternate" title="AudioContext" href="https://developer.mozilla.org/ru/docs/Web/API/AudioContext" hreflang="ru"/><link rel="alternate" title="AudioContext" href="https://developer.mozilla.org/zh-CN/docs/Web/API/AudioContext" hreflang="zh"/><link rel="alternate" title="AudioContext" href="https://developer.mozilla.org/en-US/docs/Web/API/AudioContext" hreflang="en"/><link rel="alternate" type="application/rss+xml" title="MDN Blog RSS Feed" href="/en-US/blog/rss.xml" hreflang="en" /><meta name="robots" content="index, follow"><meta name="description" content="The AudioContext interface represents an audio-processing graph built from audio modules linked together, each represented by an AudioNode."/><meta property="og:url" content="https://developer.mozilla.org/en-US/docs/Web/API/AudioContext"/><meta property="og:title" content="AudioContext - Web APIs | MDN"/><meta property="og:locale" content="en-US"/><meta property="og:description" content="The AudioContext interface represents an audio-processing graph built from audio modules linked together, each represented by an AudioNode."/><meta property="og:image" content="https://developer.mozilla.org/mdn-social-share.cd6c4a5a.png"/><meta name="twitter:card" content="summary_large_image"/><meta name="twitter:creator" content="MozDevNet"/><link rel="canonical" href="https://developer.mozilla.org/en-US/docs/Web/API/AudioContext"/><style media="print">.article-actions-container,.document-toc-container,.language-menu,.main-menu-toggle,.mdn-cta-container,.on-github,.page-footer,.place,.sidebar,.top-banner,.top-navigation-main,ul.prev-next{display:none!important}.main-page-content,.main-page-content pre{padding:2px}.main-page-content pre{border-left-width:2px}</style><script src="/static/js/ga.js" defer=""></script><script defer="defer" src="/static/js/main.8f7f874e.js"></script><link href="/static/css/main.76ba4ef8.css" rel="stylesheet"></head><body><script>document.body.addEventListener("load",(t=>{t.target.classList.contains("interactive")&&t.target.setAttribute("data-readystate","complete")}),{capture:!0});const c={light:"#ffffff",dark:"#1b1b1b"};if(window&&document.documentElement)try{const t=window.localStorage.getItem("theme");t&&(document.documentElement.className=t,document.documentElement.style.backgroundColor=c[t])}catch(t){console.warn("Unable to read theme from localStorage",t)}</script><div id="root"><ul id="nav-access" class="a11y-nav"><li><a id="skip-main" href="#content">Skip to main content</a></li><li><a id="skip-search" href="#top-nav-search-input">Skip to search</a></li><li><a id="skip-select-language" href="#languages-switcher-button">Skip to select language</a></li></ul><div class="page-wrapper category-api document-page"><div class="top-banner loading"><section class="place top container"></section></div><div class="main-document-header-container"><header class="top-navigation
"><div class="container "><div class="top-navigation-wrap"><a href="/en-US/" class="logo" aria-label="MDN homepage"><svg id="mdn-docs-logo" xmlns="http://www.w3.org/2000/svg" x="0" y="0" viewBox="0 0 694.9 104.4" style="enable-background:new 0 0 694.9 104.4" xml:space="preserve" role="img"><title>MDN Web Docs</title><path d="M40.3 0 11.7 92.1H0L28.5 0h11.8zm10.4 0v92.1H40.3V0h10.4zM91 0 62.5 92.1H50.8L79.3 0H91zm10.4 0v92.1H91V0h10.4z" class="logo-m"></path><path d="M627.9 95.6h67v8.8h-67v-8.8z" class="logo-_"></path><path d="M367 42h-4l-10.7 30.8h-5.5l-10.8-26h-.4l-10.5 26h-5.2L308.7 42h-3.8v-5.6H323V42h-6.5l6.8 20.4h.4l10.3-26h4.7l11.2 26h.5l5.7-20.3h-6.2v-5.6H367V42zm34.9 20c-.4 3.2-2 5.9-4.7 8.2-2.8 2.3-6.5 3.4-11.3 3.4-5.4 0-9.7-1.6-13.1-4.7-3.3-3.2-5-7.7-5-13.7 0-5.7 1.6-10.3 4.7-14s7.4-5.5 12.9-5.5c5.1 0 9.1 1.6 11.9 4.7s4.3 6.9 4.3 11.3c0 1.5-.2 3-.5 4.7h-25.6c.3 7.7 4 11.6 10.9 11.6 2.9 0 5.1-.7 6.5-2 1.5-1.4 2.5-3 3-4.9l6 .9zM394 51.3c.2-2.4-.4-4.7-1.8-6.9s-3.8-3.3-7-3.3c-3.1 0-5.3 1-6.9 3-1.5 2-2.5 4.4-2.8 7.2H394zm51 2.4c0 5-1.3 9.5-4 13.7s-6.9 6.2-12.7 6.2c-6 0-10.3-2.2-12.7-6.7-.1.4-.2 1.4-.4 2.9s-.3 2.5-.4 2.9h-7.3c.3-1.7.6-3.5.8-5.3.3-1.8.4-3.7.4-5.5V22.3h-6v-5.6H416v27c1.1-2.2 2.7-4.1 4.7-5.7 2-1.6 4.8-2.4 8.4-2.4 4.6 0 8.4 1.6 11.4 4.7 3 3.2 4.5 7.6 4.5 13.4zm-7.7.6c0-4.2-1-7.4-3-9.5-2-2.2-4.4-3.3-7.4-3.3-3.4 0-6 1.2-8 3.7-1.9 2.4-2.9 5-3 7.7V57c0 3 1 5.6 3 7.7s4.5 3.1 7.6 3.1c3.6 0 6.3-1.3 8.1-3.9 1.8-2.7 2.7-5.9 2.7-9.6zm69.2 18.5h-13.2v-7.2c-1.2 2.2-2.8 4.1-4.9 5.6-2.1 1.6-4.8 2.4-8.3 2.4-4.8 0-8.7-1.6-11.6-4.9-2.9-3.2-4.3-7.7-4.3-13.3 0-5 1.3-9.6 4-13.7 2.6-4.1 6.9-6.2 12.8-6.2 5.7 0 9.8 2.2 12.3 6.5V22.3h-8.6v-5.6h15.8v50.6h6v5.5zM493.2 56v-4.4c-.1-3-1.2-5.5-3.2-7.3s-4.4-2.8-7.2-2.8c-3.6 0-6.3 1.3-8.2 3.9-1.9 2.6-2.8 5.8-2.8 9.6 0 4.1 1 7.3 3 9.5s4.5 3.3 7.4 3.3c3.2 0 5.8-1.3 7.8-3.8 2.1-2.6 3.1-5.3 3.2-8zm53.1-1.4c0 5.6-1.8 10.2-5.3 13.7s-8.2 5.3-13.9 5.3-10.1-1.7-13.4-5.1c-3.3-3.4-5-7.9-5-13.5 0-5.3 1.6-9.9 4.7-13.7 3.2-3.8 7.9-5.7 14.2-5.7s11 1.9 14.1 5.7c3 3.7 4.6 8.1 4.6 13.3zm-7.7-.2c0-4-1-7.2-3-9.5s-4.8-3.5-8.2-3.5c-3.6 0-6.4 1.2-8.3 3.7s-2.9 5.6-2.9 9.5c0 3.7.9 6.8 2.8 9.4 1.9 2.6 4.6 3.9 8.3 3.9 3.6 0 6.4-1.3 8.4-3.8 1.9-2.6 2.9-5.8 2.9-9.7zm45 5.8c-.4 3.2-1.9 6.3-4.4 9.1-2.5 2.9-6.4 4.3-11.8 4.3-5.2 0-9.4-1.6-12.6-4.8-3.2-3.2-4.8-7.7-4.8-13.7 0-5.5 1.6-10.1 4.7-13.9 3.2-3.8 7.6-5.7 13.2-5.7 2.3 0 4.6.3 6.7.8 2.2.5 4.2 1.5 6.2 2.9l1.5 9.5-5.9.7-1.3-6.1c-2.1-1.2-4.5-1.8-7.2-1.8-3.5 0-6.1 1.2-7.7 3.7-1.7 2.5-2.5 5.7-2.5 9.6 0 4.1.9 7.3 2.7 9.5 1.8 2.3 4.4 3.4 7.8 3.4 5.2 0 8.2-2.9 9.2-8.8l6.2 1.3zm34.7 1.9c0 3.6-1.5 6.5-4.6 8.5s-7 3-11.7 3c-5.7 0-10.6-1.2-14.6-3.6l1.2-8.8 5.7.6-.2 4.7c1.1.5 2.3.9 3.6 1.1s2.6.3 3.9.3c2.4 0 4.5-.4 6.5-1.3 1.9-.9 2.9-2.2 2.9-4.1 0-1.8-.8-3.1-2.3-3.8s-3.5-1.3-5.8-1.7-4.6-.9-6.9-1.4c-2.3-.6-4.2-1.6-5.7-2.9-1.6-1.4-2.3-3.5-2.3-6.3 0-4.1 1.5-6.9 4.6-8.5s6.4-2.4 9.9-2.4c2.6 0 5 .3 7.2.9 2.2.6 4.3 1.4 6.1 2.4l.8 8.8-5.8.7-.8-5.7c-2.3-1-4.7-1.6-7.2-1.6-2.1 0-3.7.4-5.1 1.1-1.3.8-2 2-2 3.8 0 1.7.8 2.9 2.3 3.6 1.5.7 3.4 1.2 5.7 1.6 2.2.4 4.5.8 6.7 1.4 2.2.6 4.1 1.6 5.7 3 1.4 1.6 2.2 3.7 2.2 6.6zM197.6 73.2h-17.1v-5.5h3.8V51.9c0-3.7-.7-6.3-2.1-7.9-1.4-1.6-3.3-2.3-5.7-2.3-3.2 0-5.6 1.1-7.2 3.4s-2.4 4.6-2.5 6.9v15.6h6v5.5h-17.1v-5.5h3.8V51.9c0-3.8-.7-6.4-2.1-7.9-1.4-1.5-3.3-2.3-5.6-2.3-3.2 0-5.5 1.1-7.2 3.3-1.6 2.2-2.4 4.5-2.5 6.9v15.8h6.9v5.5h-20.2v-5.5h6V42.4h-6.1v-5.6h13.4v6.4c1.2-2.1 2.7-3.8 4.7-5.2 2-1.3 4.4-2 7.3-2s5.3.7 7.5 2.1c2.2 1.4 3.7 3.5 4.5 6.4 1.1-2.5 2.7-4.5 4.9-6.1s4.8-2.4 7.9-2.4c3.5 0 6.5 1.1 8.9 3.3s3.7 5.6 3.7 10.2v18.2h6.1v5.5zm42.5 0h-13.2V66c-1.2 2.2-2.8 4.1-4.9 5.6-2.1 1.6-4.8 2.4-8.3 2.4-4.8 0-8.7-1.6-11.6-4.9-2.9-3.2-4.3-7.7-4.3-13.3 0-5 1.3-9.6 4-13.7 2.6-4.1 6.9-6.2 12.8-6.2s9.8 2.2 12.3 6.5V22.7h-8.6v-5.6h15.8v50.6h6v5.5zm-13.3-16.8V52c-.1-3-1.2-5.5-3.2-7.3s-4.4-2.8-7.2-2.8c-3.6 0-6.3 1.3-8.2 3.9-1.9 2.6-2.8 5.8-2.8 9.6 0 4.1 1 7.3 3 9.5s4.5 3.3 7.4 3.3c3.2 0 5.8-1.3 7.8-3.8 2.1-2.6 3.1-5.3 3.2-8zm61.5 16.8H269v-5.5h6V51.9c0-3.7-.7-6.3-2.2-7.9-1.4-1.6-3.4-2.3-5.7-2.3-3.1 0-5.6 1-7.4 3s-2.8 4.4-2.9 7v15.9h6v5.5h-19.3v-5.5h6V42.4h-6.2v-5.6h13.6V43c2.6-4.6 6.8-6.9 12.7-6.9 3.6 0 6.7 1.1 9.2 3.3s3.7 5.6 3.7 10.2v18.2h6v5.4h-.2z" class="logo-text"></path></svg></a><button title="Open main menu" type="button" class="button action has-icon main-menu-toggle" aria-haspopup="menu" aria-label="Open main menu" aria-expanded="false"><span class="button-wrap"><span class="icon icon-menu "></span><span class="visually-hidden">Open main menu</span></span></button></div><div class="top-navigation-main"><nav class="main-nav" aria-label="Main menu"><ul class="main-menu nojs"><li class="top-level-entry-container"><button type="button" id="references-button" class="top-level-entry menu-toggle" aria-controls="references-menu" aria-expanded="false">References</button><a href="/en-US/docs/Web" class="top-level-entry">References</a><ul id="references-menu" class="submenu references hidden inline-submenu-lg" aria-labelledby="references-button"><li class="apis-link-container mobile-only "><a href="/en-US/docs/Web" class="submenu-item "><div class="submenu-icon"></div><div class="submenu-content-container"><div class="submenu-item-heading">Overview / Web Technology</div><p class="submenu-item-description">Web technology reference for developers</p></div></a></li><li class="html-link-container "><a href="/en-US/docs/Web/HTML" class="submenu-item "><div class="submenu-icon html"></div><div class="submenu-content-container"><div class="submenu-item-heading">HTML</div><p class="submenu-item-description">Structure of content on the web</p></div></a></li><li class="css-link-container "><a href="/en-US/docs/Web/CSS" class="submenu-item "><div class="submenu-icon css"></div><div class="submenu-content-container"><div class="submenu-item-heading">CSS</div><p class="submenu-item-description">Code used to describe document style</p></div></a></li><li class="javascript-link-container "><a href="/en-US/docs/Web/JavaScript" class="submenu-item "><div class="submenu-icon javascript"></div><div class="submenu-content-container"><div class="submenu-item-heading">JavaScript</div><p class="submenu-item-description">General-purpose scripting language</p></div></a></li><li class="http-link-container "><a href="/en-US/docs/Web/HTTP" class="submenu-item "><div class="submenu-icon http"></div><div class="submenu-content-container"><div class="submenu-item-heading">HTTP</div><p class="submenu-item-description">Protocol for transmitting web resources</p></div></a></li><li class="apis-link-container "><a href="/en-US/docs/Web/API" class="submenu-item "><div class="submenu-icon apis"></div><div class="submenu-content-container"><div class="submenu-item-heading">Web APIs</div><p class="submenu-item-description">Interfaces for building web applications</p></div></a></li><li class="apis-link-container "><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions" class="submenu-item "><div class="submenu-icon"></div><div class="submenu-content-container"><div class="submenu-item-heading">Web Extensions</div><p class="submenu-item-description">Developing extensions for web browsers</p></div></a></li><li class="apis-link-container desktop-only "><a href="/en-US/docs/Web" class="submenu-item "><div class="submenu-icon"></div><div class="submenu-content-container"><div class="submenu-item-heading">Web Technology</div><p class="submenu-item-description">Web technology reference for developers</p></div></a></li></ul></li><li class="top-level-entry-container"><button type="button" id="guides-button" class="top-level-entry menu-toggle" aria-controls="guides-menu" aria-expanded="false">Guides</button><a href="/en-US/docs/Learn" class="top-level-entry">Guides</a><ul id="guides-menu" class="submenu guides hidden inline-submenu-lg" aria-labelledby="guides-button"><li class="apis-link-container mobile-only "><a href="/en-US/docs/Learn" class="submenu-item "><div class="submenu-icon learn"></div><div class="submenu-content-container"><div class="submenu-item-heading">Overview / MDN Learning Area</div><p class="submenu-item-description">Learn web development</p></div></a></li><li class="apis-link-container desktop-only "><a href="/en-US/docs/Learn" class="submenu-item "><div class="submenu-icon learn"></div><div class="submenu-content-container"><div class="submenu-item-heading">MDN Learning Area</div><p class="submenu-item-description">Learn web development</p></div></a></li><li class="html-link-container "><a href="/en-US/docs/Learn/HTML" class="submenu-item "><div class="submenu-icon html"></div><div class="submenu-content-container"><div class="submenu-item-heading">HTML</div><p class="submenu-item-description">Learn to structure web content with HTML</p></div></a></li><li class="css-link-container "><a href="/en-US/docs/Learn/CSS" class="submenu-item "><div class="submenu-icon css"></div><div class="submenu-content-container"><div class="submenu-item-heading">CSS</div><p class="submenu-item-description">Learn to style content using CSS</p></div></a></li><li class="javascript-link-container "><a href="/en-US/docs/Learn/JavaScript" class="submenu-item "><div class="submenu-icon javascript"></div><div class="submenu-content-container"><div class="submenu-item-heading">JavaScript</div><p class="submenu-item-description">Learn to run scripts in the browser</p></div></a></li><li class=" "><a href="/en-US/docs/Web/Accessibility" class="submenu-item "><div class="submenu-icon"></div><div class="submenu-content-container"><div class="submenu-item-heading">Accessibility</div><p class="submenu-item-description">Learn to make the web accessible to all</p></div></a></li></ul></li><li class="top-level-entry-container"><button type="button" id="mdn-plus-button" class="top-level-entry menu-toggle" aria-controls="mdn-plus-menu" aria-expanded="false">Plus</button><a href="/en-US/plus" class="top-level-entry">Plus</a><ul id="mdn-plus-menu" class="submenu mdn-plus hidden inline-submenu-lg" aria-labelledby="mdn-plus-button"><li class=" "><a href="/en-US/plus" class="submenu-item "><div class="submenu-icon"></div><div class="submenu-content-container"><div class="submenu-item-heading">Overview</div><p class="submenu-item-description">A customized MDN experience</p></div></a></li><li class=" "><a href="/en-US/plus/ai-help" class="submenu-item "><div class="submenu-icon"></div><div class="submenu-content-container"><div class="submenu-item-heading">AI Help (beta)</div><p class="submenu-item-description">Get real-time assistance and support</p></div></a></li><li class=" "><a href="/en-US/plus/updates" class="submenu-item "><div class="submenu-icon"></div><div class="submenu-content-container"><div class="submenu-item-heading">Updates</div><p class="submenu-item-description">All browser compatibility updates at a glance</p></div></a></li><li class=" "><a href="/en-US/plus/docs/features/overview" class="submenu-item "><div class="submenu-icon"></div><div class="submenu-content-container"><div class="submenu-item-heading">Documentation</div><p class="submenu-item-description">Learn how to use MDN Plus</p></div></a></li><li class=" "><a href="/en-US/plus/docs/faq" class="submenu-item "><div class="submenu-icon"></div><div class="submenu-content-container"><div class="submenu-item-heading">FAQ</div><p class="submenu-item-description">Frequently asked questions about MDN Plus</p></div></a></li></ul></li><li class="top-level-entry-container"><a class="top-level-entry menu-link" href="/en-US/blog/">Blog</a></li><li class="top-level-entry-container"><a class="top-level-entry menu-link" href="/en-US/play">Play <sup class="new">New</sup></a></li><li class="top-level-entry-container"><a class="top-level-entry menu-link" href="/en-US/plus/ai-help/">AI Help <sup class="new beta">Beta</sup></a></li></ul></nav><div class="header-search"><form action="/en-US/search" class="search-form search-widget" id="top-nav-search-form" role="search"><label id="top-nav-search-label" for="top-nav-search-input" class="visually-hidden">Search MDN</label><input aria-activedescendant="" aria-autocomplete="list" aria-controls="top-nav-search-menu" aria-expanded="false" aria-labelledby="top-nav-search-label" autoComplete="off" id="top-nav-search-input" role="combobox" type="search" class="search-input-field" name="q" placeholder=" " required="" value=""/><button type="button" class="button action has-icon clear-search-button"><span class="button-wrap"><span class="icon icon-cancel "></span><span class="visually-hidden">Clear search input</span></span></button><button type="submit" class="button action has-icon search-button"><span class="button-wrap"><span class="icon icon-search "></span><span class="visually-hidden">Search</span></span></button><div id="top-nav-search-menu" role="listbox" aria-labelledby="top-nav-search-label"></div></form></div><div class="theme-switcher-menu"><button type="button" class="button action has-icon theme-switcher-menu small" aria-haspopup="menu"><span class="button-wrap"><span class="icon icon-theme-os-default "></span>Theme</span></button></div><ul class="auth-container"><li><a href="/users/fxa/login/authenticate/?next=%2Fen-US%2Fdocs%2FWeb%2FAPI%2FAudioContext" class="signin-link" rel="nofollow">Log in</a></li><li><a class="button primary mdn-plus-subscribe-link" href="/en-US/plus"><span class="button-wrap">Get MDN Plus</span></a></li></ul></div></div></header><div class="article-actions-container"><div class="container"><button type="button" class="button action has-icon sidebar-button" aria-label="Expand sidebar" aria-expanded="false" aria-controls="sidebar-quicklinks"><span class="button-wrap"><span class="icon icon-sidebar "></span></span></button><nav class="breadcrumbs-container" aria-label="Breadcrumb"><ol typeof="BreadcrumbList" vocab="https://schema.org/" aria-label="breadcrumbs"><li property="itemListElement" typeof="ListItem"><a class="breadcrumb" property="item" typeof="WebPage" href="/en-US/docs/Web"><span property="name">References</span></a><meta property="position" content="1"/></li><li property="itemListElement" typeof="ListItem"><a class="breadcrumb" property="item" typeof="WebPage" href="/en-US/docs/Web/API"><span property="name">Web APIs</span></a><meta property="position" content="2"/></li><li property="itemListElement" typeof="ListItem"><a class="breadcrumb-current-page" property="item" typeof="WebPage" href="/en-US/docs/Web/API/AudioContext"><span property="name">AudioContext</span></a><meta property="position" content="3"/></li></ol></nav><div class="article-actions"><button type="button" class="button action has-icon article-actions-toggle" aria-label="Article actions"><span class="button-wrap"><span class="icon icon-ellipses "></span><span class="article-actions-dialog-heading">Article Actions</span></span></button><ul class="article-actions-entries"><li class="article-actions-entry"><div class="languages-switcher-menu open-on-focus-within"><button id="languages-switcher-button" type="button" class="button action small has-icon languages-switcher-menu" aria-haspopup="menu"><span class="button-wrap"><span class="icon icon-language "></span>English (US)</span></button></div></li></ul></div></div></div></div><div class="main-wrapper"><div class="sidebar-container"><aside id="sidebar-quicklinks" class="sidebar" data-macro="APIRef"><button type="button" class="button action backdrop" aria-label="Collapse sidebar"><span class="button-wrap"></span></button><nav aria-label="Related Topics" class="sidebar-inner"><header class="sidebar-actions"><section class="sidebar-filter-container"><div class="sidebar-filter "><label id="sidebar-filter-label" class="sidebar-filter-label" for="sidebar-filter-input"><span class="icon icon-filter"></span><span class="visually-hidden">Filter sidebar</span></label><input id="sidebar-filter-input" autoComplete="off" class="sidebar-filter-input-field false" type="text" placeholder="Filter" value=""/><button type="button" class="button action has-icon clear-sidebar-filter-button"><span class="button-wrap"><span class="icon icon-cancel "></span><span class="visually-hidden">Clear filter input</span></span></button></div></section></header><div class="sidebar-inner-nav"><div class="in-nav-toc"><div class="document-toc-container"><section class="document-toc"><header><h2 class="document-toc-heading">In this article</h2></header><ul class="document-toc-list"><li class="document-toc-item "><a class="document-toc-link" href="#constructor">Constructor</a></li><li class="document-toc-item "><a class="document-toc-link" href="#instance_properties">Instance properties</a></li><li class="document-toc-item "><a class="document-toc-link" href="#instance_methods">Instance methods</a></li><li class="document-toc-item "><a class="document-toc-link" href="#events">Events</a></li><li class="document-toc-item "><a class="document-toc-link" href="#examples">Examples</a></li><li class="document-toc-item "><a class="document-toc-link" href="#specifications">Specifications</a></li><li class="document-toc-item "><a class="document-toc-link" href="#browser_compatibility">Browser compatibility</a></li><li class="document-toc-item "><a class="document-toc-link" href="#see_also">See also</a></li></ul></section></div></div><div class="sidebar-body"><ol><li><strong><a href="/en-US/docs/Web/API/Web_Audio_API">Web Audio API</a></strong></li><li><strong><em><a href="/en-US/docs/Web/API/AudioContext" aria-current="page"><code>AudioContext</code></a></em></strong></li><li class="toggle"><details open=""><summary>Constructor</summary><ol><li><a href="/en-US/docs/Web/API/AudioContext/AudioContext"><code>AudioContext()</code></a></li></ol></details></li><li class="toggle"><details open=""><summary>Instance properties</summary><ol><li><a href="/en-US/docs/Web/API/AudioContext/baseLatency"><code>baseLatency</code></a></li><li><a href="/en-US/docs/Web/API/AudioContext/outputLatency"><code>outputLatency</code></a></li><li><a href="/en-US/docs/Web/API/AudioContext/sinkId"><code>sinkId</code></a><abbr class="icon icon-experimental" title="Experimental. Expect behavior to change in the future.">
<span class="visually-hidden">Experimental</span>
</abbr></li></ol></details></li><li class="toggle"><details open=""><summary>Instance methods</summary><ol><li><a href="/en-US/docs/Web/API/AudioContext/close"><code>close()</code></a></li><li><a href="/en-US/docs/Web/API/AudioContext/createMediaElementSource"><code>createMediaElementSource()</code></a></li><li><a href="/en-US/docs/Web/API/AudioContext/createMediaStreamDestination"><code>createMediaStreamDestination()</code></a></li><li><a href="/en-US/docs/Web/API/AudioContext/createMediaStreamSource"><code>createMediaStreamSource()</code></a></li><li><a href="/en-US/docs/Web/API/AudioContext/createMediaStreamTrackSource"><code>createMediaStreamTrackSource()</code></a></li><li><a href="/en-US/docs/Web/API/AudioContext/getOutputTimestamp"><code>getOutputTimestamp()</code></a></li><li><a href="/en-US/docs/Web/API/AudioContext/resume"><code>resume()</code></a></li><li><a href="/en-US/docs/Web/API/AudioContext/setSinkId"><code>setSinkId()</code></a><abbr class="icon icon-experimental" title="Experimental. Expect behavior to change in the future.">
<span class="visually-hidden">Experimental</span>
</abbr></li><li><a href="/en-US/docs/Web/API/AudioContext/suspend"><code>suspend()</code></a></li></ol></details></li><li class="toggle"><details open=""><summary>Events</summary><ol><li><a href="/en-US/docs/Web/API/AudioContext/sinkchange_event"><code>sinkchange</code></a><abbr class="icon icon-experimental" title="Experimental. Expect behavior to change in the future.">
<span class="visually-hidden">Experimental</span>
</abbr></li></ol></details></li><li class="toggle"><details open=""><summary>Inheritance:</summary><ol><li><a href="/en-US/docs/Web/API/BaseAudioContext"><code>BaseAudioContext</code></a></li><li><a href="/en-US/docs/Web/API/EventTarget"><code>EventTarget</code></a></li></ol></details></li><li class="toggle"><details open=""><summary>Related pages for Web Audio API</summary><ol><li><a href="/en-US/docs/Web/API/AnalyserNode"><code>AnalyserNode</code></a></li><li><a href="/en-US/docs/Web/API/AudioBuffer"><code>AudioBuffer</code></a></li><li><a href="/en-US/docs/Web/API/AudioBufferSourceNode"><code>AudioBufferSourceNode</code></a></li><li><a href="/en-US/docs/Web/API/AudioDestinationNode"><code>AudioDestinationNode</code></a></li><li><a href="/en-US/docs/Web/API/AudioListener"><code>AudioListener</code></a></li><li><a href="/en-US/docs/Web/API/AudioNode"><code>AudioNode</code></a></li><li><a href="/en-US/docs/Web/API/AudioParam"><code>AudioParam</code></a></li><li><a href="/en-US/docs/Web/API/AudioProcessingEvent"><code>AudioProcessingEvent</code></a></li><li><a href="/en-US/docs/Web/API/AudioScheduledSourceNode"><code>AudioScheduledSourceNode</code></a></li><li><a href="/en-US/docs/Web/API/AudioSinkInfo"><code>AudioSinkInfo</code></a></li><li><a href="/en-US/docs/Web/API/AudioWorklet"><code>AudioWorklet</code></a></li><li><a href="/en-US/docs/Web/API/AudioWorkletGlobalScope"><code>AudioWorkletGlobalScope</code></a></li><li><a href="/en-US/docs/Web/API/AudioWorkletNode"><code>AudioWorkletNode</code></a></li><li><a href="/en-US/docs/Web/API/AudioWorkletProcessor"><code>AudioWorkletProcessor</code></a></li><li><a href="/en-US/docs/Web/API/BaseAudioContext"><code>BaseAudioContext</code></a></li><li><a href="/en-US/docs/Web/API/BiquadFilterNode"><code>BiquadFilterNode</code></a></li><li><a href="/en-US/docs/Web/API/ChannelMergerNode"><code>ChannelMergerNode</code></a></li><li><a href="/en-US/docs/Web/API/ChannelSplitterNode"><code>ChannelSplitterNode</code></a></li><li><a href="/en-US/docs/Web/API/ConstantSourceNode"><code>ConstantSourceNode</code></a></li><li><a href="/en-US/docs/Web/API/ConvolverNode"><code>ConvolverNode</code></a></li><li><a href="/en-US/docs/Web/API/DelayNode"><code>DelayNode</code></a></li><li><a href="/en-US/docs/Web/API/DynamicsCompressorNode"><code>DynamicsCompressorNode</code></a></li><li><a href="/en-US/docs/Web/API/GainNode"><code>GainNode</code></a></li><li><a href="/en-US/docs/Web/API/IIRFilterNode"><code>IIRFilterNode</code></a></li><li><a href="/en-US/docs/Web/API/MediaElementAudioSourceNode"><code>MediaElementAudioSourceNode</code></a></li><li><a href="/en-US/docs/Web/API/MediaStreamAudioDestinationNode"><code>MediaStreamAudioDestinationNode</code></a></li><li><a href="/en-US/docs/Web/API/MediaStreamAudioSourceNode"><code>MediaStreamAudioSourceNode</code></a></li><li><a href="/en-US/docs/Web/API/OfflineAudioCompletionEvent"><code>OfflineAudioCompletionEvent</code></a></li><li><a href="/en-US/docs/Web/API/OfflineAudioContext"><code>OfflineAudioContext</code></a></li><li><a href="/en-US/docs/Web/API/OscillatorNode"><code>OscillatorNode</code></a></li><li><a href="/en-US/docs/Web/API/PannerNode"><code>PannerNode</code></a></li><li><a href="/en-US/docs/Web/API/PeriodicWave"><code>PeriodicWave</code></a></li><li><a href="/en-US/docs/Web/API/StereoPannerNode"><code>StereoPannerNode</code></a></li><li><a href="/en-US/docs/Web/API/WaveShaperNode"><code>WaveShaperNode</code></a></li></ol></details></li></ol></div></div><section class="place side"></section></nav></aside><div class="toc-container"><aside class="toc"><nav><div class="document-toc-container"><section class="document-toc"><header><h2 class="document-toc-heading">In this article</h2></header><ul class="document-toc-list"><li class="document-toc-item "><a class="document-toc-link" href="#constructor">Constructor</a></li><li class="document-toc-item "><a class="document-toc-link" href="#instance_properties">Instance properties</a></li><li class="document-toc-item "><a class="document-toc-link" href="#instance_methods">Instance methods</a></li><li class="document-toc-item "><a class="document-toc-link" href="#events">Events</a></li><li class="document-toc-item "><a class="document-toc-link" href="#examples">Examples</a></li><li class="document-toc-item "><a class="document-toc-link" href="#specifications">Specifications</a></li><li class="document-toc-item "><a class="document-toc-link" href="#browser_compatibility">Browser compatibility</a></li><li class="document-toc-item "><a class="document-toc-link" href="#see_also">See also</a></li></ul></section></div></nav></aside><section class="place side"></section></div></div><main id="content" class="main-content "><article class="main-page-content" lang="en-US"><header><h1>AudioContext</h1></header><div class="section-content"><p>The <code>AudioContext</code> interface represents an audio-processing graph built from audio modules linked together, each represented by an <a href="/en-US/docs/Web/API/AudioNode"><code>AudioNode</code></a>.</p>
<p>An audio context controls both the creation of the nodes it contains and the execution of the audio processing, or decoding. You need to create an <code>AudioContext</code> before you do anything else, as everything happens inside a context. It's recommended to create one AudioContext and reuse it instead of initializing a new one each time, and it's OK to use a single <code>AudioContext</code> for several different audio sources and pipeline concurrently.</p><svg viewBox="-1 -1 650 42" preserveAspectRatio="xMinYMin meet">
<a style="text-decoration: none;" xlink:href="/en-US/docs/Web/API/EventTarget">
<rect x="0" y="0" width="88" height="25" fill="#fff" stroke="#D4DDE4" stroke-width="2px"></rect>
<text x="44" y="16" font-size="10px" fill="#4D4E53" text-anchor="middle">
EventTarget
</text>
</a>
<line x1="88" y1="14" x2="118" y2="14" stroke="#D4DDE4"></line>
<polyline points="88,14 98,9 98,19 88,14" stroke="#D4DDE4" fill="#fff"></polyline>
<a style="text-decoration: none;" xlink:href="/en-US/docs/Web/API/BaseAudioContext">
<rect x="118" y="0" width="128" height="25" fill="#fff" stroke="#D4DDE4" stroke-width="2px"></rect>
<text x="182" y="16" font-size="10px" fill="#4D4E53" text-anchor="middle">
BaseAudioContext
</text>
</a>
<line x1="246" y1="14" x2="276" y2="14" stroke="#D4DDE4"></line>
<polyline points="246,14 256,9 256,19 246,14" stroke="#D4DDE4" fill="#fff"></polyline>
<a style="text-decoration: none;" xlink:href="/en-US/docs/Web/API/AudioContext" aria-current="page">
<rect x="276" y="0" width="96" height="25" fill="#F4F7F8" stroke="#D4DDE4" stroke-width="2px"></rect>
<text x="324" y="16" font-size="10px" fill="#4D4E53" text-anchor="middle">
AudioContext
</text>
</a></svg></div><section aria-labelledby="constructor"><h2 id="constructor"><a href="#constructor">Constructor</a></h2><div class="section-content"><dl>
<dt id="audiocontext"><a href="/en-US/docs/Web/API/AudioContext/AudioContext" title="AudioContext()"><code>AudioContext()</code></a></dt>
<dd>
<p>Creates and returns a new <code>AudioContext</code> object.</p>
</dd>
</dl></div></section><section aria-labelledby="instance_properties"><h2 id="instance_properties"><a href="#instance_properties">Instance properties</a></h2><div class="section-content"><p><em>Also inherits properties from its parent interface, <a href="/en-US/docs/Web/API/BaseAudioContext"><code>BaseAudioContext</code></a>.</em></p>
<dl>
<dt id="audiocontext.baselatency"><a href="/en-US/docs/Web/API/AudioContext/baseLatency"><code>AudioContext.baseLatency</code></a> <span title="This value may not be changed." class="badge inline readonly">Read only </span></dt>
<dd>
<p>Returns the number of seconds of processing latency incurred by the <a href="/en-US/docs/Web/API/AudioContext" aria-current="page"><code>AudioContext</code></a> passing the audio from the <a href="/en-US/docs/Web/API/AudioDestinationNode"><code>AudioDestinationNode</code></a> to the audio subsystem.</p>
</dd>
<dt id="audiocontext.outputlatency"><a href="/en-US/docs/Web/API/AudioContext/outputLatency"><code>AudioContext.outputLatency</code></a> <span title="This value may not be changed." class="badge inline readonly">Read only </span></dt>
<dd>
<p>Returns an estimation of the output latency of the current audio context.</p>
</dd>
<dt id="audiocontext.sinkid"><a href="/en-US/docs/Web/API/AudioContext/sinkId"><code>AudioContext.sinkId</code></a> <span title="This value may not be changed." class="badge inline readonly">Read only </span> <abbr class="icon icon-experimental" title="Experimental. Expect behavior to change in the future.">
<span class="visually-hidden">Experimental</span>
</abbr></dt>
<dd>
<p>Returns the sink ID of the current output audio device.</p>
</dd>
</dl></div></section><section aria-labelledby="instance_methods"><h2 id="instance_methods"><a href="#instance_methods">Instance methods</a></h2><div class="section-content"><p><em>Also inherits methods from its parent interface, <a href="/en-US/docs/Web/API/BaseAudioContext"><code>BaseAudioContext</code></a>.</em></p>
<dl>
<dt id="audiocontext.close"><a href="/en-US/docs/Web/API/AudioContext/close"><code>AudioContext.close()</code></a></dt>
<dd>
<p>Closes the audio context, releasing any system audio resources that it uses.</p>
</dd>
<dt id="audiocontext.createmediaelementsource"><a href="/en-US/docs/Web/API/AudioContext/createMediaElementSource"><code>AudioContext.createMediaElementSource()</code></a></dt>
<dd>
<p>Creates a <a href="/en-US/docs/Web/API/MediaElementAudioSourceNode"><code>MediaElementAudioSourceNode</code></a> associated with an <a href="/en-US/docs/Web/API/HTMLMediaElement"><code>HTMLMediaElement</code></a>. This can be used to play and manipulate audio from <a href="/en-US/docs/Web/HTML/Element/video"><code><video></code></a> or <a href="/en-US/docs/Web/HTML/Element/audio"><code><audio></code></a> elements.</p>
</dd>
<dt id="audiocontext.createmediastreamsource"><a href="/en-US/docs/Web/API/AudioContext/createMediaStreamSource"><code>AudioContext.createMediaStreamSource()</code></a></dt>
<dd>
<p>Creates a <a href="/en-US/docs/Web/API/MediaStreamAudioSourceNode"><code>MediaStreamAudioSourceNode</code></a> associated with a <a href="/en-US/docs/Web/API/MediaStream"><code>MediaStream</code></a> representing an audio stream which may come from the local computer microphone or other sources.</p>
</dd>
<dt id="audiocontext.createmediastreamdestination"><a href="/en-US/docs/Web/API/AudioContext/createMediaStreamDestination"><code>AudioContext.createMediaStreamDestination()</code></a></dt>
<dd>
<p>Creates a <a href="/en-US/docs/Web/API/MediaStreamAudioDestinationNode"><code>MediaStreamAudioDestinationNode</code></a> associated with a <a href="/en-US/docs/Web/API/MediaStream"><code>MediaStream</code></a> representing an audio stream which may be stored in a local file or sent to another computer.</p>
</dd>
<dt id="audiocontext.createmediastreamtracksource"><a href="/en-US/docs/Web/API/AudioContext/createMediaStreamTrackSource"><code>AudioContext.createMediaStreamTrackSource()</code></a></dt>
<dd>
<p>Creates a <a href="/en-US/docs/Web/API/MediaStreamTrackAudioSourceNode"><code>MediaStreamTrackAudioSourceNode</code></a> associated with a <a href="/en-US/docs/Web/API/MediaStream"><code>MediaStream</code></a> representing an media stream track.</p>
</dd>
<dt id="audiocontext.getoutputtimestamp"><a href="/en-US/docs/Web/API/AudioContext/getOutputTimestamp"><code>AudioContext.getOutputTimestamp()</code></a></dt>
<dd>
<p>Returns a new <code>AudioTimestamp</code> object containing two audio timestamp values relating to the current audio context.</p>
</dd>
<dt id="audiocontext.resume"><a href="/en-US/docs/Web/API/AudioContext/resume"><code>AudioContext.resume()</code></a></dt>
<dd>
<p>Resumes the progression of time in an audio context that has previously been suspended/paused.</p>
</dd>
<dt id="audiocontext.setsinkid"><a href="/en-US/docs/Web/API/AudioContext/setSinkId"><code>AudioContext.setSinkId()</code></a> <abbr class="icon icon-experimental" title="Experimental. Expect behavior to change in the future.">
<span class="visually-hidden">Experimental</span>
</abbr></dt>
<dd>
<p>Sets the output audio device for the <code>AudioContext</code>.</p>
</dd>
<dt id="audiocontext.suspend"><a href="/en-US/docs/Web/API/AudioContext/suspend"><code>AudioContext.suspend()</code></a></dt>
<dd>
<p>Suspends the progression of time in the audio context, temporarily halting audio hardware access and reducing CPU/battery usage in the process.</p>
</dd>
</dl></div></section><section aria-labelledby="events"><h2 id="events"><a href="#events">Events</a></h2><div class="section-content"><dl>
<dt id="sinkchange"><a href="/en-US/docs/Web/API/AudioContext/sinkchange_event" title="sinkchange"><code>sinkchange</code></a> <abbr class="icon icon-experimental" title="Experimental. Expect behavior to change in the future.">
<span class="visually-hidden">Experimental</span>
</abbr></dt>
<dd>
<p>Fired when the output audio device (and therefore, the <a href="/en-US/docs/Web/API/AudioContext/sinkId"><code>AudioContext.sinkId</code></a>) has changed.</p>
</dd>
</dl></div></section><section aria-labelledby="examples"><h2 id="examples"><a href="#examples">Examples</a></h2><div class="section-content"><p>Basic audio context declaration:</p>
<div class="code-example"><p class="example-header"><span class="language-name">js</span></p><pre class="brush: js notranslate" data-signature="mn6f6soN6r5GVY6NJoshOU2ZojM2QE8gNxrFgp8HGJ0="><code><span class="token keyword">const</span> audioCtx <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">AudioContext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> oscillatorNode <span class="token operator">=</span> audioCtx<span class="token punctuation">.</span><span class="token function">createOscillator</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> gainNode <span class="token operator">=</span> audioCtx<span class="token punctuation">.</span><span class="token function">createGain</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> finish <span class="token operator">=</span> audioCtx<span class="token punctuation">.</span>destination<span class="token punctuation">;</span>
<span class="token comment">// etc.</span>
</code></pre></div></div></section><h2 id="specifications"><a href="#specifications">Specifications</a></h2><table class="standard-table"><thead><tr><th scope="col">Specification</th></tr></thead><tbody><tr><td><a href="https://webaudio.github.io/web-audio-api/#AudioContext">Web Audio API<!-- --> <br/><small># <!-- -->AudioContext</small></a></td></tr></tbody></table><h2 id="browser_compatibility"><a href="#browser_compatibility">Browser compatibility</a></h2><p>BCD tables only load in the browser<noscript> <!-- -->with JavaScript enabled. Enable JavaScript to view data.</noscript></p><section aria-labelledby="see_also"><h2 id="see_also"><a href="#see_also">See also</a></h2><div class="section-content"><ul>
<li><a href="/en-US/docs/Web/API/Web_Audio_API/Using_Web_Audio_API">Using the Web Audio API</a></li>
<li><a href="/en-US/docs/Web/API/OfflineAudioContext"><code>OfflineAudioContext</code></a></li>
</ul></div></section><aside class="metadata"><div class="metadata-content-container"><div id="on-github" class="on-github"><h3>Found a content problem with this page?</h3><ul><li><a href="https://github.com/mdn/content/edit/main/files/en-us/web/api/audiocontext/index.md" title="This will take you to GitHub, where you'll need to sign in first." target="_blank" rel="noopener noreferrer">Edit the page on GitHub</a>.</li><li><a href="https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FWeb%2FAPI%2FAudioContext&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fweb%2Fapi%2Faudiocontext%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FWeb%2FAPI%2FAudioContext%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fweb%2Fapi%2Faudiocontext%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2Fbca8d1ab2bc4f5a1ef6b39c454b0229539178e98%0A*+Document+last+modified%3A+2023-02-18T07%3A09%3A59.000Z%0A%0A%3C%2Fdetails%3E" title="This will take you to GitHub to file a new issue." target="_blank" rel="noopener noreferrer">Report the content issue</a>.</li><li><a href="https://github.com/mdn/content/blob/main/files/en-us/web/api/audiocontext/index.md?plain=1" title="Folder: en-us/web/api/audiocontext (Opens in a new tab)" target="_blank" rel="noopener noreferrer">View the source on GitHub</a>.</li></ul>Want to get more involved?<!-- --> <a href="https://github.com/mdn/content/blob/main/CONTRIBUTING.md" title="This will take you to our contribution guidelines on GitHub." target="_blank" rel="noopener noreferrer">Learn how to contribute</a>.</div><p class="last-modified-date">This page was last modified on<!-- --> <time dateTime="2023-02-18T07:09:59.000Z">Feb 18, 2023</time> by<!-- --> <a href="/en-US/docs/Web/API/AudioContext/contributors.txt">MDN contributors</a>.</p></div></aside></article></main></div></div><footer id="nav-footer" class="page-footer"><div class="page-footer-grid"><div class="page-footer-logo-col"><a href="/" class="mdn-footer-logo" aria-label="MDN homepage"><svg width="48" height="17" viewBox="0 0 48 17" fill="none" xmlns="http://www.w3.org/2000/svg"><title id="mdn-footer-logo-svg">MDN logo</title><path d="M20.04 16.512H15.504V10.416C15.504 9.488 15.344 8.824 15.024 8.424C14.72 8.024 14.264 7.824 13.656 7.824C12.92 7.824 12.384 8.064 12.048 8.544C11.728 9.024 11.568 9.64 11.568 10.392V14.184H13.008V16.512H8.472V10.416C8.472 9.488 8.312 8.824 7.992 8.424C7.688 8.024 7.232 7.824 6.624 7.824C5.872 7.824 5.336 8.064 5.016 8.544C4.696 9.024 4.536 9.64 4.536 10.392V14.184H6.6V16.512H0V14.184H1.44V8.04H0.024V5.688H4.536V7.32C5.224 6.088 6.32 5.472 7.824 5.472C8.608 5.472 9.328 5.664 9.984 6.048C10.64 6.432 11.096 7.016 11.352 7.8C11.992 6.248 13.168 5.472 14.88 5.472C15.856 5.472 16.72 5.776 17.472 6.384C18.224 6.992 18.6 7.936 18.6 9.216V14.184H20.04V16.512Z" fill="currentColor"></path><path d="M33.6714 16.512H29.1354V14.496C28.8314 15.12 28.3834 15.656 27.7914 16.104C27.1994 16.536 26.4154 16.752 25.4394 16.752C24.0154 16.752 22.8954 16.264 22.0794 15.288C21.2634 14.312 20.8554 12.984 20.8554 11.304C20.8554 9.688 21.2554 8.312 22.0554 7.176C22.8554 6.04 24.0634 5.472 25.6794 5.472C26.5594 5.472 27.2794 5.648 27.8394 6C28.3994 6.352 28.8314 6.8 29.1354 7.344V2.352H26.9754V0H32.2314V14.184H33.6714V16.512ZM29.1354 11.04V10.776C29.1354 9.88 28.8954 9.184 28.4154 8.688C27.9514 8.176 27.3674 7.92 26.6634 7.92C25.9754 7.92 25.3674 8.176 24.8394 8.688C24.3274 9.2 24.0714 10.008 24.0714 11.112C24.0714 12.152 24.3114 12.944 24.7914 13.488C25.2714 14.032 25.8394 14.304 26.4954 14.304C27.3114 14.304 27.9514 13.96 28.4154 13.272C28.8954 12.584 29.1354 11.84 29.1354 11.04Z" fill="currentColor"></path><path d="M47.9589 16.512H41.9829V14.184H43.4229V10.416C43.4229 9.488 43.2629 8.824 42.9429 8.424C42.6389 8.024 42.1829 7.824 41.5749 7.824C40.8389 7.824 40.2709 8.056 39.8709 8.52C39.4709 8.968 39.2629 9.56 39.2469 10.296V14.184H40.6869V16.512H34.7109V14.184H36.1509V8.04H34.5909V5.688H39.2469V7.344C39.9669 6.096 41.1269 5.472 42.7269 5.472C43.7509 5.472 44.6389 5.776 45.3909 6.384C46.1429 6.992 46.5189 7.936 46.5189 9.216V14.184H47.9589V16.512Z" fill="currentColor"></path></svg></a><p>Your blueprint for a better internet.</p><ul class="social-icons"><li><a class="icon icon-twitter" href="https://twitter.com/mozdevnet" target="_blank" rel="noopener noreferrer"><span class="visually-hidden">MDN on Twitter</span></a></li><li><a class="icon icon-github-mark-small" href="https://github.com/mdn/" target="_blank" rel="noopener noreferrer"><span class="visually-hidden">MDN on GitHub</span></a></li><li><a class="icon icon-feed" href="/en-US/blog/rss.xml" target="_blank"><span class="visually-hidden">MDN Blog RSS Feed</span></a></li></ul></div><div class="page-footer-nav-col-1"><h2 class="footer-nav-heading">MDN</h2><ul class="footer-nav-list"><li class="footer-nav-item"><a href="/en-US/about">About</a></li><li class="footer-nav-item"><a href="/en-US/blog/">Blog</a></li><li class="footer-nav-item"><a href="https://www.mozilla.org/en-US/careers/listings/?team=Marketing" target="_blank" rel="noopener noreferrer">Careers</a></li><li class="footer-nav-item"><a href="/en-US/advertising">Advertise with us</a></li></ul></div><div class="page-footer-nav-col-2"><h2 class="footer-nav-heading">Support</h2><ul class="footer-nav-list"><li class="footer-nav-item"><a class="footer-nav-link" href="https://support.mozilla.org/products/mdn-plus">Product help</a></li><li class="footer-nav-item"><a class="footer-nav-link" href="/en-US/docs/MDN/Community/Issues">Report an issue</a></li></ul></div><div class="page-footer-nav-col-3"><h2 class="footer-nav-heading">Our communities</h2><ul class="footer-nav-list"><li class="footer-nav-item"><a class="footer-nav-link" href="/en-US/community">MDN Community</a></li><li class="footer-nav-item"><a class="footer-nav-link" href="https://discourse.mozilla.org/c/mdn/236" target="_blank" rel="noopener noreferrer">MDN Forum</a></li><li class="footer-nav-item"><a class="footer-nav-link" href="https://wiki.mozilla.org/Matrix" target="_blank" rel="noopener noreferrer">MDN Chat</a></li></ul></div><div class="page-footer-nav-col-4"><h2 class="footer-nav-heading">Developers</h2><ul class="footer-nav-list"><li class="footer-nav-item"><a class="footer-nav-link" href="/en-US/docs/Web">Web Technologies</a></li><li class="footer-nav-item"><a class="footer-nav-link" href="/en-US/docs/Learn">Learn Web Development</a></li><li class="footer-nav-item"><a class="footer-nav-link" href="/en-US/plus">MDN Plus</a></li><li class="footer-nav-item"><a href="https://hacks.mozilla.org/" target="_blank" rel="noopener noreferrer">Hacks Blog</a></li></ul></div><div class="page-footer-moz"><a href="https://www.mozilla.org/" class="footer-moz-logo-link" target="_blank" rel="noopener noreferrer"><svg width="112" height="32" fill="none" xmlns="http://www.w3.org/2000/svg"><title id="mozilla-footer-logo-svg">Mozilla logo</title><path d="M41.753 14.218c-2.048 0-3.324 1.522-3.324 4.157 0 2.423 1.119 4.286 3.29 4.286 2.082 0 3.447-1.678 3.447-4.347 0-2.826-1.522-4.096-3.413-4.096Zm54.89 7.044c0 .901.437 1.618 1.645 1.618 1.427 0 2.949-1.024 3.044-3.352-.649-.095-1.365-.185-2.02-.185-1.426-.005-2.668.397-2.668 1.92Z" fill="currentColor"></path><path d="M0 0v32h111.908V0H0Zm32.56 25.426h-5.87v-7.884c0-2.423-.806-3.352-2.39-3.352-1.924 0-2.702 1.365-2.702 3.324v4.868h1.864v3.044h-5.864v-7.884c0-2.423-.806-3.352-2.39-3.352-1.924 0-2.702 1.365-2.702 3.324v4.868h2.669v3.044H6.642v-3.044h1.863v-7.918H6.642V11.42h5.864v2.11c.839-1.489 2.3-2.39 4.252-2.39 2.02 0 3.878.963 4.566 3.01.778-1.862 2.361-3.01 4.566-3.01 2.512 0 4.812 1.522 4.812 4.84v6.402h1.863v3.044h-.005Zm9.036.307c-4.314 0-7.296-2.635-7.296-7.106 0-4.096 2.484-7.481 7.514-7.481s7.481 3.38 7.481 7.29c0 4.472-3.228 7.297-7.699 7.297Zm22.578-.307H51.942l-.403-2.11 7.7-8.846h-4.376l-.621 2.17-2.888-.313.498-4.907h12.294l.313 2.11-7.767 8.852h4.533l.654-2.172 3.167.308-.872 4.908Zm7.99 0h-4.191v-5.03h4.19v5.03Zm0-8.976h-4.191v-5.03h4.19v5.03Zm2.618 8.976 6.054-21.358h3.945l-6.054 21.358h-3.945Zm8.136 0 6.048-21.358h3.945l-6.054 21.358h-3.939Zm21.486.307c-1.863 0-2.887-1.085-3.072-2.792-.805 1.427-2.232 2.792-4.498 2.792-2.02 0-4.314-1.085-4.314-4.006 0-3.447 3.323-4.253 6.518-4.253.778 0 1.584.034 2.3.124v-.465c0-1.427-.034-3.133-2.3-3.133-.84 0-1.488.061-2.143.402l-.453 1.578-3.195-.34.549-3.224c2.45-.996 3.692-1.27 5.992-1.27 3.01 0 5.556 1.55 5.556 4.75v6.083c0 .805.314 1.085.963 1.085.184 0 .375-.034.587-.095l.034 2.11a5.432 5.432 0 0 1-2.524.654Z" fill="currentColor"></path></svg></a><ul class="footer-moz-list"><li class="footer-moz-item"><a href="https://www.mozilla.org/privacy/websites/" class="footer-moz-link" target="_blank" rel="noopener noreferrer">Website Privacy Notice</a></li><li class="footer-moz-item"><a href="https://www.mozilla.org/privacy/websites/#cookies" class="footer-moz-link" target="_blank" rel="noopener noreferrer">Cookies</a></li><li class="footer-moz-item"><a href="https://www.mozilla.org/about/legal/terms/mozilla" class="footer-moz-link" target="_blank" rel="noopener noreferrer">Legal</a></li><li class="footer-moz-item"><a href="https://www.mozilla.org/about/governance/policies/participation/" class="footer-moz-link" target="_blank" rel="noopener noreferrer">Community Participation Guidelines</a></li></ul></div><div class="page-footer-legal"><p id="license" class="page-footer-legal-text">Visit<!-- --> <a href="https://www.mozilla.org" target="_blank" rel="noopener noreferrer">Mozilla Corporation’s</a> <!-- -->not-for-profit parent, the<!-- --> <a target="_blank" rel="noopener noreferrer" href="https://foundation.mozilla.org/">Mozilla Foundation</a>.<br/>Portions of this content are ©1998–<!-- -->2023<!-- --> by individual mozilla.org contributors. Content available under<!-- --> <a href="/en-US/docs/MDN/Writing_guidelines/Attrib_copyright_license">a Creative Commons license</a>.</p></div></div></footer></div><script type="application/json" id="hydration">{"doc":{"isMarkdown":true,"isTranslated":false,"isActive":true,"flaws":{},"title":"AudioContext","mdn_url":"/en-US/docs/Web/API/AudioContext","locale":"en-US","native":"English (US)","browserCompat":["api.AudioContext"],"sidebarHTML":"<ol><li><strong><a href=\"/en-US/docs/Web/API/Web_Audio_API\">Web Audio API</a></strong></li><li><strong><em><a href=\"/en-US/docs/Web/API/AudioContext\" aria-current=\"page\"><code>AudioContext</code></a></em></strong></li><li class=\"toggle\"><details open=\"\"><summary>Constructor</summary><ol><li><a href=\"/en-US/docs/Web/API/AudioContext/AudioContext\"><code>AudioContext()</code></a></li></ol></details></li><li class=\"toggle\"><details open=\"\"><summary>Instance properties</summary><ol><li><a href=\"/en-US/docs/Web/API/AudioContext/baseLatency\"><code>baseLatency</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioContext/outputLatency\"><code>outputLatency</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioContext/sinkId\"><code>sinkId</code></a><abbr class=\"icon icon-experimental\" title=\"Experimental. Expect behavior to change in the future.\">\n <span class=\"visually-hidden\">Experimental</span>\n</abbr></li></ol></details></li><li class=\"toggle\"><details open=\"\"><summary>Instance methods</summary><ol><li><a href=\"/en-US/docs/Web/API/AudioContext/close\"><code>close()</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioContext/createMediaElementSource\"><code>createMediaElementSource()</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioContext/createMediaStreamDestination\"><code>createMediaStreamDestination()</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioContext/createMediaStreamSource\"><code>createMediaStreamSource()</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioContext/createMediaStreamTrackSource\"><code>createMediaStreamTrackSource()</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioContext/getOutputTimestamp\"><code>getOutputTimestamp()</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioContext/resume\"><code>resume()</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioContext/setSinkId\"><code>setSinkId()</code></a><abbr class=\"icon icon-experimental\" title=\"Experimental. Expect behavior to change in the future.\">\n <span class=\"visually-hidden\">Experimental</span>\n</abbr></li><li><a href=\"/en-US/docs/Web/API/AudioContext/suspend\"><code>suspend()</code></a></li></ol></details></li><li class=\"toggle\"><details open=\"\"><summary>Events</summary><ol><li><a href=\"/en-US/docs/Web/API/AudioContext/sinkchange_event\"><code>sinkchange</code></a><abbr class=\"icon icon-experimental\" title=\"Experimental. Expect behavior to change in the future.\">\n <span class=\"visually-hidden\">Experimental</span>\n</abbr></li></ol></details></li><li class=\"toggle\"><details open=\"\"><summary>Inheritance:</summary><ol><li><a href=\"/en-US/docs/Web/API/BaseAudioContext\"><code>BaseAudioContext</code></a></li><li><a href=\"/en-US/docs/Web/API/EventTarget\"><code>EventTarget</code></a></li></ol></details></li><li class=\"toggle\"><details open=\"\"><summary>Related pages for Web Audio API</summary><ol><li><a href=\"/en-US/docs/Web/API/AnalyserNode\"><code>AnalyserNode</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioBuffer\"><code>AudioBuffer</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioBufferSourceNode\"><code>AudioBufferSourceNode</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioDestinationNode\"><code>AudioDestinationNode</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioListener\"><code>AudioListener</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioNode\"><code>AudioNode</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioParam\"><code>AudioParam</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioProcessingEvent\"><code>AudioProcessingEvent</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioScheduledSourceNode\"><code>AudioScheduledSourceNode</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioSinkInfo\"><code>AudioSinkInfo</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioWorklet\"><code>AudioWorklet</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioWorkletGlobalScope\"><code>AudioWorkletGlobalScope</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioWorkletNode\"><code>AudioWorkletNode</code></a></li><li><a href=\"/en-US/docs/Web/API/AudioWorkletProcessor\"><code>AudioWorkletProcessor</code></a></li><li><a href=\"/en-US/docs/Web/API/BaseAudioContext\"><code>BaseAudioContext</code></a></li><li><a href=\"/en-US/docs/Web/API/BiquadFilterNode\"><code>BiquadFilterNode</code></a></li><li><a href=\"/en-US/docs/Web/API/ChannelMergerNode\"><code>ChannelMergerNode</code></a></li><li><a href=\"/en-US/docs/Web/API/ChannelSplitterNode\"><code>ChannelSplitterNode</code></a></li><li><a href=\"/en-US/docs/Web/API/ConstantSourceNode\"><code>ConstantSourceNode</code></a></li><li><a href=\"/en-US/docs/Web/API/ConvolverNode\"><code>ConvolverNode</code></a></li><li><a href=\"/en-US/docs/Web/API/DelayNode\"><code>DelayNode</code></a></li><li><a href=\"/en-US/docs/Web/API/DynamicsCompressorNode\"><code>DynamicsCompressorNode</code></a></li><li><a href=\"/en-US/docs/Web/API/GainNode\"><code>GainNode</code></a></li><li><a href=\"/en-US/docs/Web/API/IIRFilterNode\"><code>IIRFilterNode</code></a></li><li><a href=\"/en-US/docs/Web/API/MediaElementAudioSourceNode\"><code>MediaElementAudioSourceNode</code></a></li><li><a href=\"/en-US/docs/Web/API/MediaStreamAudioDestinationNode\"><code>MediaStreamAudioDestinationNode</code></a></li><li><a href=\"/en-US/docs/Web/API/MediaStreamAudioSourceNode\"><code>MediaStreamAudioSourceNode</code></a></li><li><a href=\"/en-US/docs/Web/API/OfflineAudioCompletionEvent\"><code>OfflineAudioCompletionEvent</code></a></li><li><a href=\"/en-US/docs/Web/API/OfflineAudioContext\"><code>OfflineAudioContext</code></a></li><li><a href=\"/en-US/docs/Web/API/OscillatorNode\"><code>OscillatorNode</code></a></li><li><a href=\"/en-US/docs/Web/API/PannerNode\"><code>PannerNode</code></a></li><li><a href=\"/en-US/docs/Web/API/PeriodicWave\"><code>PeriodicWave</code></a></li><li><a href=\"/en-US/docs/Web/API/StereoPannerNode\"><code>StereoPannerNode</code></a></li><li><a href=\"/en-US/docs/Web/API/WaveShaperNode\"><code>WaveShaperNode</code></a></li></ol></details></li></ol>","sidebarMacro":"APIRef","body":[{"type":"prose","value":{"id":null,"title":null,"isH3":false,"content":"<p>The <code>AudioContext</code> interface represents an audio-processing graph built from audio modules linked together, each represented by an <a href=\"/en-US/docs/Web/API/AudioNode\"><code>AudioNode</code></a>.</p>\n<p>An audio context controls both the creation of the nodes it contains and the execution of the audio processing, or decoding. You need to create an <code>AudioContext</code> before you do anything else, as everything happens inside a context. It's recommended to create one AudioContext and reuse it instead of initializing a new one each time, and it's OK to use a single <code>AudioContext</code> for several different audio sources and pipeline concurrently.</p><svg viewBox=\"-1 -1 650 42\" preserveAspectRatio=\"xMinYMin meet\">\n <a style=\"text-decoration: none;\" xlink:href=\"/en-US/docs/Web/API/EventTarget\">\n <rect x=\"0\" y=\"0\" width=\"88\" height=\"25\" fill=\"#fff\" stroke=\"#D4DDE4\" stroke-width=\"2px\"></rect>\n <text x=\"44\" y=\"16\" font-size=\"10px\" fill=\"#4D4E53\" text-anchor=\"middle\">\n EventTarget\n </text>\n </a>\n <line x1=\"88\" y1=\"14\" x2=\"118\" y2=\"14\" stroke=\"#D4DDE4\"></line>\n <polyline points=\"88,14 98,9 98,19 88,14\" stroke=\"#D4DDE4\" fill=\"#fff\"></polyline>\n <a style=\"text-decoration: none;\" xlink:href=\"/en-US/docs/Web/API/BaseAudioContext\">\n <rect x=\"118\" y=\"0\" width=\"128\" height=\"25\" fill=\"#fff\" stroke=\"#D4DDE4\" stroke-width=\"2px\"></rect>\n <text x=\"182\" y=\"16\" font-size=\"10px\" fill=\"#4D4E53\" text-anchor=\"middle\">\n BaseAudioContext\n </text>\n </a>\n <line x1=\"246\" y1=\"14\" x2=\"276\" y2=\"14\" stroke=\"#D4DDE4\"></line>\n <polyline points=\"246,14 256,9 256,19 246,14\" stroke=\"#D4DDE4\" fill=\"#fff\"></polyline>\n <a style=\"text-decoration: none;\" xlink:href=\"/en-US/docs/Web/API/AudioContext\" aria-current=\"page\">\n <rect x=\"276\" y=\"0\" width=\"96\" height=\"25\" fill=\"#F4F7F8\" stroke=\"#D4DDE4\" stroke-width=\"2px\"></rect>\n <text x=\"324\" y=\"16\" font-size=\"10px\" fill=\"#4D4E53\" text-anchor=\"middle\">\n AudioContext\n </text>\n </a></svg>"}},{"type":"prose","value":{"id":"constructor","title":"Constructor","isH3":false,"content":"<dl>\n <dt id=\"audiocontext\"><a href=\"/en-US/docs/Web/API/AudioContext/AudioContext\" title=\"AudioContext()\"><code>AudioContext()</code></a></dt>\n <dd>\n <p>Creates and returns a new <code>AudioContext</code> object.</p>\n </dd>\n</dl>"}},{"type":"prose","value":{"id":"instance_properties","title":"Instance properties","isH3":false,"content":"<p><em>Also inherits properties from its parent interface, <a href=\"/en-US/docs/Web/API/BaseAudioContext\"><code>BaseAudioContext</code></a>.</em></p>\n<dl>\n <dt id=\"audiocontext.baselatency\"><a href=\"/en-US/docs/Web/API/AudioContext/baseLatency\"><code>AudioContext.baseLatency</code></a> <span title=\"This value may not be changed.\" class=\"badge inline readonly\">Read only </span></dt>\n <dd>\n <p>Returns the number of seconds of processing latency incurred by the <a href=\"/en-US/docs/Web/API/AudioContext\" aria-current=\"page\"><code>AudioContext</code></a> passing the audio from the <a href=\"/en-US/docs/Web/API/AudioDestinationNode\"><code>AudioDestinationNode</code></a> to the audio subsystem.</p>\n </dd>\n <dt id=\"audiocontext.outputlatency\"><a href=\"/en-US/docs/Web/API/AudioContext/outputLatency\"><code>AudioContext.outputLatency</code></a> <span title=\"This value may not be changed.\" class=\"badge inline readonly\">Read only </span></dt>\n <dd>\n <p>Returns an estimation of the output latency of the current audio context.</p>\n </dd>\n <dt id=\"audiocontext.sinkid\"><a href=\"/en-US/docs/Web/API/AudioContext/sinkId\"><code>AudioContext.sinkId</code></a> <span title=\"This value may not be changed.\" class=\"badge inline readonly\">Read only </span> <abbr class=\"icon icon-experimental\" title=\"Experimental. Expect behavior to change in the future.\">\n <span class=\"visually-hidden\">Experimental</span>\n</abbr></dt>\n <dd>\n <p>Returns the sink ID of the current output audio device.</p>\n </dd>\n</dl>"}},{"type":"prose","value":{"id":"instance_methods","title":"Instance methods","isH3":false,"content":"<p><em>Also inherits methods from its parent interface, <a href=\"/en-US/docs/Web/API/BaseAudioContext\"><code>BaseAudioContext</code></a>.</em></p>\n<dl>\n <dt id=\"audiocontext.close\"><a href=\"/en-US/docs/Web/API/AudioContext/close\"><code>AudioContext.close()</code></a></dt>\n <dd>\n <p>Closes the audio context, releasing any system audio resources that it uses.</p>\n </dd>\n <dt id=\"audiocontext.createmediaelementsource\"><a href=\"/en-US/docs/Web/API/AudioContext/createMediaElementSource\"><code>AudioContext.createMediaElementSource()</code></a></dt>\n <dd>\n <p>Creates a <a href=\"/en-US/docs/Web/API/MediaElementAudioSourceNode\"><code>MediaElementAudioSourceNode</code></a> associated with an <a href=\"/en-US/docs/Web/API/HTMLMediaElement\"><code>HTMLMediaElement</code></a>. This can be used to play and manipulate audio from <a href=\"/en-US/docs/Web/HTML/Element/video\"><code><video></code></a> or <a href=\"/en-US/docs/Web/HTML/Element/audio\"><code><audio></code></a> elements.</p>\n </dd>\n <dt id=\"audiocontext.createmediastreamsource\"><a href=\"/en-US/docs/Web/API/AudioContext/createMediaStreamSource\"><code>AudioContext.createMediaStreamSource()</code></a></dt>\n <dd>\n <p>Creates a <a href=\"/en-US/docs/Web/API/MediaStreamAudioSourceNode\"><code>MediaStreamAudioSourceNode</code></a> associated with a <a href=\"/en-US/docs/Web/API/MediaStream\"><code>MediaStream</code></a> representing an audio stream which may come from the local computer microphone or other sources.</p>\n </dd>\n <dt id=\"audiocontext.createmediastreamdestination\"><a href=\"/en-US/docs/Web/API/AudioContext/createMediaStreamDestination\"><code>AudioContext.createMediaStreamDestination()</code></a></dt>\n <dd>\n <p>Creates a <a href=\"/en-US/docs/Web/API/MediaStreamAudioDestinationNode\"><code>MediaStreamAudioDestinationNode</code></a> associated with a <a href=\"/en-US/docs/Web/API/MediaStream\"><code>MediaStream</code></a> representing an audio stream which may be stored in a local file or sent to another computer.</p>\n </dd>\n <dt id=\"audiocontext.createmediastreamtracksource\"><a href=\"/en-US/docs/Web/API/AudioContext/createMediaStreamTrackSource\"><code>AudioContext.createMediaStreamTrackSource()</code></a></dt>\n <dd>\n <p>Creates a <a href=\"/en-US/docs/Web/API/MediaStreamTrackAudioSourceNode\"><code>MediaStreamTrackAudioSourceNode</code></a> associated with a <a href=\"/en-US/docs/Web/API/MediaStream\"><code>MediaStream</code></a> representing an media stream track.</p>\n </dd>\n <dt id=\"audiocontext.getoutputtimestamp\"><a href=\"/en-US/docs/Web/API/AudioContext/getOutputTimestamp\"><code>AudioContext.getOutputTimestamp()</code></a></dt>\n <dd>\n <p>Returns a new <code>AudioTimestamp</code> object containing two audio timestamp values relating to the current audio context.</p>\n </dd>\n <dt id=\"audiocontext.resume\"><a href=\"/en-US/docs/Web/API/AudioContext/resume\"><code>AudioContext.resume()</code></a></dt>\n <dd>\n <p>Resumes the progression of time in an audio context that has previously been suspended/paused.</p>\n </dd>\n <dt id=\"audiocontext.setsinkid\"><a href=\"/en-US/docs/Web/API/AudioContext/setSinkId\"><code>AudioContext.setSinkId()</code></a> <abbr class=\"icon icon-experimental\" title=\"Experimental. Expect behavior to change in the future.\">\n <span class=\"visually-hidden\">Experimental</span>\n</abbr></dt>\n <dd>\n <p>Sets the output audio device for the <code>AudioContext</code>.</p>\n </dd>\n <dt id=\"audiocontext.suspend\"><a href=\"/en-US/docs/Web/API/AudioContext/suspend\"><code>AudioContext.suspend()</code></a></dt>\n <dd>\n <p>Suspends the progression of time in the audio context, temporarily halting audio hardware access and reducing CPU/battery usage in the process.</p>\n </dd>\n</dl>"}},{"type":"prose","value":{"id":"events","title":"Events","isH3":false,"content":"<dl>\n <dt id=\"sinkchange\"><a href=\"/en-US/docs/Web/API/AudioContext/sinkchange_event\" title=\"sinkchange\"><code>sinkchange</code></a> <abbr class=\"icon icon-experimental\" title=\"Experimental. Expect behavior to change in the future.\">\n <span class=\"visually-hidden\">Experimental</span>\n</abbr></dt>\n <dd>\n <p>Fired when the output audio device (and therefore, the <a href=\"/en-US/docs/Web/API/AudioContext/sinkId\"><code>AudioContext.sinkId</code></a>) has changed.</p>\n </dd>\n</dl>"}},{"type":"prose","value":{"id":"examples","title":"Examples","isH3":false,"content":"<p>Basic audio context declaration:</p>\n<div class=\"code-example\"><p class=\"example-header\"><span class=\"language-name\">js</span></p><pre class=\"brush: js notranslate\" data-signature=\"mn6f6soN6r5GVY6NJoshOU2ZojM2QE8gNxrFgp8HGJ0=\"><code><span class=\"token keyword\">const</span> audioCtx <span class=\"token operator\">=</span> <span class=\"token keyword\">new</span> <span class=\"token class-name\">AudioContext</span><span class=\"token punctuation\">(</span><span class=\"token punctuation\">)</span><span class=\"token punctuation\">;</span>\n\n<span class=\"token keyword\">const</span> oscillatorNode <span class=\"token operator\">=</span> audioCtx<span class=\"token punctuation\">.</span><span class=\"token function\">createOscillator</span><span class=\"token punctuation\">(</span><span class=\"token punctuation\">)</span><span class=\"token punctuation\">;</span>\n<span class=\"token keyword\">const</span> gainNode <span class=\"token operator\">=</span> audioCtx<span class=\"token punctuation\">.</span><span class=\"token function\">createGain</span><span class=\"token punctuation\">(</span><span class=\"token punctuation\">)</span><span class=\"token punctuation\">;</span>\n<span class=\"token keyword\">const</span> finish <span class=\"token operator\">=</span> audioCtx<span class=\"token punctuation\">.</span>destination<span class=\"token punctuation\">;</span>\n<span class=\"token comment\">// etc.</span>\n</code></pre></div>"}},{"type":"specifications","value":{"title":"Specifications","id":"specifications","isH3":false,"specifications":[{"bcdSpecificationURL":"https://webaudio.github.io/web-audio-api/#AudioContext","title":"Web Audio API"}],"query":"api.AudioContext"}},{"type":"browser_compatibility","value":{"title":"Browser compatibility","id":"browser_compatibility","isH3":false,"query":"api.AudioContext"}},{"type":"prose","value":{"id":"see_also","title":"See also","isH3":false,"content":"<ul>\n <li><a href=\"/en-US/docs/Web/API/Web_Audio_API/Using_Web_Audio_API\">Using the Web Audio API</a></li>\n <li><a href=\"/en-US/docs/Web/API/OfflineAudioContext\"><code>OfflineAudioContext</code></a></li>\n</ul>"}}],"toc":[{"text":"Constructor","id":"constructor"},{"text":"Instance properties","id":"instance_properties"},{"text":"Instance methods","id":"instance_methods"},{"text":"Events","id":"events"},{"text":"Examples","id":"examples"},{"text":"Specifications","id":"specifications"},{"text":"Browser compatibility","id":"browser_compatibility"},{"text":"See also","id":"see_also"}],"summary":"The AudioContext interface represents an audio-processing graph built from audio modules linked together, each represented by an AudioNode.","popularity":0.02,"modified":"2023-02-18T07:09:59.000Z","other_translations":[{"locale":"fr","title":"AudioContext","native":"Français"},{"locale":"ja","title":"AudioContext","native":"日本語"},{"locale":"ko","title":"AudioContext","native":"한국어"},{"locale":"pt-BR","title":"AudioContext","native":"Português (do Brasil)"},{"locale":"ru","title":"AudioContext","native":"Русский"},{"locale":"zh-CN","title":"AudioContext","native":"中文 (简体)"}],"source":{"folder":"en-us/web/api/audiocontext","github_url":"https://github.com/mdn/content/blob/main/files/en-us/web/api/audiocontext/index.md","last_commit_url":"https://github.com/mdn/content/commit/bca8d1ab2bc4f5a1ef6b39c454b0229539178e98","filename":"index.md"},"short_title":"AudioContext","parents":[{"uri":"/en-US/docs/Web","title":"References"},{"uri":"/en-US/docs/Web/API","title":"Web APIs"},{"uri":"/en-US/docs/Web/API/AudioContext","title":"AudioContext"}],"pageTitle":"AudioContext - Web APIs | MDN","noIndexing":false}}</script></body></html>