Created
March 10, 2011 17:13
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Audio processing (FF4)!
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| <!doctype html> | |
| Please select an audio file: <input type='file' id='file'> | |
| <script src='http://code.jquery.com/jquery-1.5.1.js'></script> | |
| <script src='https://github.com/corbanbrook/dsp.js/raw/master/dsp.js'></script> | |
| <script type='text/javascript'> | |
| var fileElement = document.getElementById('file'); | |
| var sampleRate = 44100; | |
| var frameSize = 4096; | |
| var signal = new Float32Array(frameSize/2); | |
| var buffer = []; | |
| var output = new Audio(); | |
| if ( typeof output.mozSetup === 'function' ) { | |
| output.mozSetup(1, sampleRate); | |
| } | |
| var filter = new IIRFilter(DSP.LOWPASS, 22050, 0, 44100); | |
| filter.set(6000, 100); | |
| console.log(filter) | |
| //var playerElement = document.getElementById('filePlayer'); | |
| fileElement.addEventListener("change", function(files) { | |
| var files = this.files; | |
| var playerElement = new Audio(); | |
| playerElement.src = window.URL.createObjectURL(files[0]); | |
| playerElement.addEventListener('MozAudioAvailable', function(event) { | |
| var signal = DSP.getChannel(DSP.MIX, event.frameBuffer); | |
| filter.process(signal); | |
| output.mozWriteAudio(signal); | |
| }, false); | |
| playerElement.addEventListener('loadedmetadata', function() { | |
| playerElement.play(); | |
| playerElement.muted = true; | |
| }, false); | |
| }, false); | |
| </script> |
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