js实现实时麦克风音量大小捕获指示器效果代码-html代码-BFW代码库

js实现实时麦克风音量大小捕获指示器效果代码

代码语言：html

所属分类：多媒体

代码描述：js实现实时麦克风音量大小捕获指示器效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/jquery-3.2.1.min.js"></script>
    <script type="text/javascript">
        navigator.mediaDevices.getUserMedia({
            audio: true
        })
        .then(function(stream) {
            audioContext = new AudioContext();
            analyser = audioContext.createAnalyser();
            microphone = audioContext.createMediaStreamSource(stream);
            javascriptNode = audioContext.createScriptProcessor(2048, 1, 1);

            analyser.smoothingTimeConstant = 0.8;
            analyser.fftSize = 1024;

            microphone.connect(analyser);
            analyser.connect(javascriptNode);
            javascriptNode.connect(audioContext.destination);
            javascriptNode.onaudioprocess = function() {
                var array = new Uint8Array(analyser.frequencyBinCount);
                analyser.getByteFrequencyData(array);
                var values = 0;

                var length = array.length;
                for (var i = 0; i < length; i++) {
                    values += (array[i]);
                }

                var average = values / length;
                //检测到的声音输入带下，输出一下
                console.log(Math.round(average));

                colorPids(Math.round(average));
                // colorPids(average);
            }
        })
        .catch(function(err) {
            /* handle the error */
        });
        function colorPids(vol) {
            let all.........完整代码请登录后点击上方下载按钮下载查看