I mean: Did you know I got a new mp3 to midi converter. Type this: loadInstrument(13); var el = $('<input type="file" accept="audio/*">'); $(document.body).append(el); el.on('change', function(e){ var reader = new FileReader(); reader.onload = function (e) { var context = new AudioContext(); context.decodeAudioData(e.target.result, function(buffer){ var node = context.createAnalyser(); var resolution = 4; node.fftSize = 4096; node.smoothingTim