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index.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Test Microphone</title>
<meta
name="viewport"
content="width=device-width, initial-scale=1, maximum-scale=1"
/>
<link rel="shortcut icon" href="data:image/x-icon;," type="image/x-icon" />
<style>
* {
padding: 0;
margin: 0;
box-sizing: border-box;
}
body {
color: #606c76;
font-family: "Roboto", "Helvetica Neue", "Helvetica", "Arial",
sans-serif;
width: 100%;
margin: 0 auto;
padding: 10px;
}
h1,
p,
div {
margin: 10px 0;
}
h1 {
font-size: 3.6rem;
}
button {
width: 100%;
height: 50px;
font-size: 1rem;
cursor: pointer;
}
#record {
background-color: #eb4934;
color: #ffffff;
border: 0px;
}
#visualizer {
display: none;
margin: 10px 0;
height: 60px;
width: 100%;
}
#stop {
background-color: #ffffff;
display: none;
}
#audio {
display: none;
margin: 10px 0;
width: 100%;
}
/* Desktop Styles */
@media only screen and (min-width: 961px) {
body {
max-width: 600px;
}
}
</style>
<script>
window.addEventListener("DOMContentLoaded", function() {
const record = document.getElementById("record");
const visualizer = document.getElementById("visualizer");
const stop = document.getElementById("stop");
const audio = document.getElementById("audio");
const canvasCtx = visualizer.getContext("2d");
let chunks = [];
navigator.mediaDevices
.getUserMedia({
audio: true
})
.then(function(stream) {
visualize(stream);
const mediaRecorder = new MediaRecorder(stream);
mediaRecorder.ondataavailable = function(e) {
chunks.push(e.data);
};
mediaRecorder.onstop = function(e) {
const blob = new Blob(chunks, {
type: "audio/ogg; codecs=opus"
});
audio.src = window.URL.createObjectURL(blob);
audio.play();
// clear recorded audio
chunks = [];
};
record.onclick = function() {
mediaRecorder.start();
visualizer.style.display = "block";
audio.style.display = "none";
stop.style.display = "block";
record.style.display = "none";
stop.disabled = false;
record.disabled = true;
};
stop.onclick = function() {
mediaRecorder.stop();
visualizer.style.display = "none";
audio.style.display = "block";
stop.style.display = "none";
record.style.display = "block";
stop.disabled = true;
record.disabled = false;
};
})
.catch(function(err) {
console.log(err);
alert("There was a problem accessing your microphone.");
});
function visualize(stream) {
const audioCtx = new AudioContext();
const source = audioCtx.createMediaStreamSource(stream);
const analyser = audioCtx.createAnalyser();
analyser.fftSize = 2048;
const bufferLength = analyser.frequencyBinCount;
const dataArray = new Uint8Array(bufferLength);
source.connect(analyser);
draw();
function draw() {
WIDTH = visualizer.width;
HEIGHT = visualizer.height;
requestAnimationFrame(draw);
analyser.getByteTimeDomainData(dataArray);
canvasCtx.fillStyle = "#ffffff";
canvasCtx.fillRect(0, 0, WIDTH, HEIGHT);
canvasCtx.lineWidth = 1;
canvasCtx.strokeStyle = "#4287f5";
canvasCtx.beginPath();
let sliceWidth = (WIDTH * 1.0) / bufferLength;
let x = 0;
for (let i = 0; i < bufferLength; i++) {
let v = dataArray[i] / 128.0;
let y = (v * HEIGHT) / 2;
if (i === 0) {
canvasCtx.moveTo(x, y);
} else {
canvasCtx.lineTo(x, y);
}
x += sliceWidth;
}
canvasCtx.lineTo(visualizer.width, visualizer.height / 2);
canvasCtx.stroke();
}
}
});
</script>
</head>
<body>
<header>
<h1>Test Microphone</h1>
<p>
Click 'Record', speak into your microphone and then click 'Stop' to hear
what was recorded.
</p>
</header>
<main>
<div id="buttons">
<button id="record">Record</button>
<button id="stop">Stop</button>
</div>
<canvas id="visualizer"></canvas>
<audio id="audio" controls="true"></audio>
</main>
<!-- prettier-ignore -->
<a href="https://github.com/bradymholt/test-microphone" class="github-corner" aria-label="View source on GitHub"><svg width="80" height="80" viewBox="0 0 250 250" style="fill:#70B7FD; color:#fff; position: absolute; top: 0; border: 0; right: 0;" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a>
<!-- prettier-ignore -->
<style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style>
</body>
</html>