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Web Audio API code for loading audio at a particular speed.

/ Published in: JavaScript
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Code required to play an audio file using Web Audio API

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  1. function playAudio(file, speed){	
  2. 	if (typeof AudioContext == "function") {
  3. 		var audioContext = new AudioContext();
  4. 	} else if (typeof webkitAudioContext == "function") {
  5. 		var audioContext = new webkitAudioContext();
  6. 	}
  7.  
  8. 	var source = audioContext.createBufferSource();
  9. 	source.connect(audioContext.destination);
  10.  
  11.  
  12. 	var xhr = new XMLHttpRequest();
  13. 	xhr.open("GET", file, true);
  14. 	xhr.responseType = "arraybuffer";
  15. 	xhr.onload = function() {
  16. 		var buffer = audioContext.createBuffer(xhr.response, false);
  17. 		source.buffer = buffer;
  18. 		source.playbackRate.value = speed;
  19. 		source.noteOn(0);
  20. 	};
  21. 	xhr.send();
  22. }

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