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you can try as below, // This function call in the init function of the application loadSoundFile('Samplefile.mp3'); var context = new window.webkitAudioContext(); var source = null; var audioBuffer = null; function stopSound() { console.log('stopSound called'); if (source) { source.noteOff(0); } } function playSound() { if (audioBuffer) { console.log('Creating source buffer'); source = context.createBufferSource(); source.buffer = audioBuffer; //source.loop = false; console.log('Connecting source to destination'); source.connect(context.destination); source.noteOn(0); console.log('Playback started'); } else{ console.log('Audio file not decoded yet'); } } function decodeAudioFile(arrayBuffer) { console.log('Decoding array buffer..'); context.decodeAudioData(arrayBuffer, function(buffer) { audioBuffer= buffer; console.log('Decoded data ready'); }, function(e) { console.log('Error decoding file', e); }); } function loadSoundFile(url) { console.log('loadSoundFile'); var xhr = new XMLHttpRequest(); xhr.open('GET', url, true); xhr.responseType = 'arraybuffer'; xhr.onload = function(e) { decodeAudioFile(this.response); // this.response is an ArrayBuffer. }; xhr.send(); } The playback continues even when the application goes in background. But there is a delay in starting the file playback. It seems the webkit decoding is taking longer time. In the above case, when launch the app, wait till you see the "Decoded data ready" in the logging (decoding happens in background, when app is launched) and then start the playback. Of course, this might not work for multiple file playback, as we cannot decode them all in advance. Below is the JIRA for the delayed playback issue. https://bugs.tizen.org/jira/browse/TWEB-148

The same discussion. https://developer.tizen.org/forums/web-application-development/web-audio-api-delay-local-files