test.html

<!doctype html>

<meta chatrset="utf-8"/>

<style></style>

<script src="./bundle.js"></script>


<script type="text/javascript">
/**
 * Comparison with web-audio-api spectum
 */
// var audioCtx = new (window.AudioContext || window.webkitAudioContext)();

// var channels = 2;
// var frameCount = audioCtx.sampleRate * 2.0;
// var myArrayBuffer = audioCtx.createBuffer(channels, frameCount, audioCtx.sampleRate);
// for (var channel = 0; channel < channels; channel++) {
// 	var nowBuffering = myArrayBuffer.getChannelData(channel);
// 	for (var i = 0; i < frameCount; i++) {
// 		nowBuffering[i] =
// 		+ Math.cos(Math.PI * 2 * 5000 * i / 44100)
// 		+ Math.cos(Math.PI * 2 * 10000 * i / 44100)
// 	  //+ Math.random() * 2 - 1;
// 	}
// }
// var source = audioCtx.createBufferSource();
// source.buffer = myArrayBuffer;


// // start the source playing
// var analyser = audioCtx.createAnalyser();
// analyser.fftSize = 2048;
// var bufferLength = analyser.frequencyBinCount;

// setInterval(function () {
// 	var dataArray = new Float32Array(bufferLength);

// 	analyser.getFloatFrequencyData(dataArray);

// 	console.log(dataArray[0])
// }, 100);

// source.connect(analyser);
// analyser.connect(audioCtx.destination);
// source.start();

</script>