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    <p>The problem in your code is that you're copying and appending another copy of the MP3 file onto the end of itself. That copy gets effectively ignored by the decoder - it's not raw buffer data, it's just random spurious junk in the file stream, following a perfectly complete MP3 file.</p> <p>What you need to do is first decode the audio data into a AudioBuffer, then append the audio buffers together into a new AudioBuffer. This requires a little bit of restructuring of your code.</p> <p>What you want to do is this:</p> <pre><code>var context = new webkitAudioContext(); function init() { /** * Appends two ArrayBuffers into a new one. * * @param {ArrayBuffer} buffer1 The first buffer. * @param {ArrayBuffer} buffer2 The second buffer. */ function appendBuffer(buffer1, buffer2) { var numberOfChannels = Math.min( buffer1.numberOfChannels, buffer2.numberOfChannels ); var tmp = context.createBuffer( numberOfChannels, (buffer1.length + buffer2.length), buffer1.sampleRate ); for (var i=0; i&lt;numberOfChannels; i++) { var channel = tmp.getChannelData(i); channel.set( buffer1.getChannelData(i), 0); channel.set( buffer2.getChannelData(i), buffer1.length); } return tmp; } /** * Loads a song * * @param {String} url The url of the song. */ function loadSongWebAudioAPI(url) { var request = new XMLHttpRequest(); request.open('GET', url, true); request.responseType = 'arraybuffer'; /** * Appends two ArrayBuffers into a new one. * * @param {ArrayBuffer} data The ArrayBuffer that was loaded. */ function play(data) { //decode the loaded data context.decodeAudioData(data, function(buf) { var audioSource = context.createBufferSource(); audioSource.connect(context.destination); // Concatenate the two buffers into one. audioSource.buffer = appendBuffer(buf, buf); audioSource.noteOn(0); audioSource.playbackRate.value = 1; }); }; // When the song is loaded asynchronously try to play it. request.onload = function() { play(request.response); } request.send(); } loadSongWebAudioAPI('loop.mp3'); } window.addEventListener('load',init,false); </code></pre> <p>There's a slight playback gap - that's because you have nearly 50ms of silence at the beginning of your sound sample, not due to looping issues.</p> <p>Hope this helps!</p>
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    1. POWeb Audio API append/concatenate different AudioBuffers and play them as one song
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    1. COThanks, your comment helped me! http://72lions.github.com/PlayingChunkedMP3-WebAudioAPI/
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