copy/paste from stack overflow

2 years ago · 655ea6aeb0
parent e75a3b82d9
commit 655ea6aeb0
3 changed files with 45 additions and 0 deletions
--- a/README.md
+++ b/README.md
@ -0,0 +1,5 @@
 # Mic Measurement
 ## Help
 - https://stackoverflow.com/questions/33322681/checking-microphone-volume-in-javascript
--- a/app.js
+++ b/app.js
@ -0,0 +1,29 @@
 navigator.mediaDevices.getUserMedia({
 	audio: true,
 	video: true
 })
 	.then(function(stream) {
 		const audioContext = new AudioContext();
 		const analyser = audioContext.createAnalyser();
 		const microphone = audioContext.createMediaStreamSource(stream);
 		const scriptProcessor = audioContext.createScriptProcessor(2048, 1, 1);
 		analyser.smoothingTimeConstant = 0.8;
 		analyser.fftSize = 1024;
 		microphone.connect(analyser);
 		analyser.connect(scriptProcessor);
 		scriptProcessor.connect(audioContext.destination);
 		scriptProcessor.onaudioprocess = function() {
 			const array = new Uint8Array(analyser.frequencyBinCount);
 			analyser.getByteFrequencyData(array);
 			const arraySum = array.reduce((a, value) => a + value, 0);
 			const average = arraySum / array.length;
 			console.log(Math.round(average));
 			// colorPids(average);
 		};
 	})
 	.catch(function(err) {
 		/* handle the error */
 		console.error(err);
 	});
--- a/index.html
+++ b/index.html
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 <!DOCTYPE html>
 <html lang="en">
 <head>
 	<meta charset="UTF-8">
 	<title></title>
 	<script src="app.js"></script>
 </head>
 <body>
 </body>
 </html>