{"id":15131,"date":"2026-10-01T03:37:00","date_gmt":"2026-10-01T03:37:00","guid":{"rendered":"https:\/\/playgama.com\/blog\/?p=15131"},"modified":"2026-10-01T03:37:00","modified_gmt":"2026-10-01T03:37:00","slug":"how-to-unlock-web-audio-api-on-user-interaction-in-mobile-br","status":"publish","type":"post","link":"https:\/\/playgama.com\/blog\/business-faqs\/how-to-unlock-web-audio-api-on-user-interaction-in-mobile-br\/","title":{"rendered":"How to unlock web audio API on user interaction in mobile browsers?"},"content":{"rendered":"

Mobile browsers create the AudioContext in a suspended state and only let it start after a genuine user gesture. Call context.resume() inside the click\/tap event handler itself, then start playback – don’t wait for a later async callback to do it.<\/strong><\/p>\n

At a glance<\/h2>\n\n\n\n\n\n\n\n
Fact<\/th>\nValue<\/th>\nSource<\/th>\n<\/tr>\n<\/thead>\n
AudioContext auto-suspends until user gesture<\/td>\nclick, tap, keypress<\/td>\ndeveloper.chrome.com<\/a><\/td>\n<\/tr>\n
Resume requires two conditions met<\/td>\ninteraction + source.start()<\/td>\ndeveloper.chrome.com<\/a><\/td>\n<\/tr>\n
Programmatic volume control may be disabled<\/td>\non mobile browsers<\/td>\ndeveloper.mozilla.org<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Create the AudioContext<\/code> once, then resume it from inside the first tap\/click\/keypress handler, before you do anything async. Chrome’s own guidance is explicit: “An AudioContext will be resumed automatically when two conditions are met: The user has interacted with a page. The start() method of a source node is called.” If your resume() call happens after an await, a network fetch, or a setTimeout, the browser may no longer count it as tied to the gesture, and playback stays silent. For testing, Playgama MCP<\/a> lets an AI agent publish a sandbox link to playtest on a mobile browser.<\/p>\n

Practical pattern:<\/p>\n

let ctx;\nfunction unlockAudio() {\n if (!ctx) ctx = new (window.AudioContext || window.webkitAudioContext)();\n if (ctx.state === 'suspended') ctx.resume();\n const buffer = ctx.createBuffer(1, 1, ctx.sampleRate);\n const src = ctx.createBufferSource();\n src.buffer = buffer;\n src.connect(ctx.destination);\n src.start(0);\n}\ndocument.addEventListener('touchend', unlockAudio, { once: true });\ndocument.addEventListener('click', unlockAudio, { once: true });<\/code><\/pre>\n
Pitfalls: mobile browsers often disable buffering and programmatic volume control until playback has started, so preload what you can but expect the first real sound to trigger the actual unlock. If your engine uses Phaser, its WebAudioSoundManager already handles resuming the context on first gesture; other engines (Unity WebGL, Godot web export) need you to call the same resume() logic through their JS interop.<\/p>\n
Sources<\/h2>\n