Highcharts VU Meter Chart Example

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Example

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>Highcharts - VU Meter Chart</title>
    <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
    <script src="https://code.highcharts.com/highcharts.js"></script>
    <script src="https://code.highcharts.com/highcharts-more.js"></script>
    <script src="https://code.highcharts.com/modules/exporting.js"></script>
    <script type="text/javascript">
        $(function () {
            var chartype = {
                type: 'gauge',
                plotBorderWidth: 1,
                plotBackgroundColor: {
                    linearGradient: { x1: 0, y1: 0, x2: 0, y2: 1 },
                    stops: [
                        [0, '#FFF4C6'],
                        [0.3, '#FFFFFF'],
                        [1, '#FFF4C6']
                    ]
                },
                plotBackgroundImage: null,
                height: 200
            }
            var chartitle = {
                text: 'VU meter'
            }
            var chartpane = [{
                startAngle: -45,
                endAngle: 45,
                background: null,
                center: ['25%', '145%'],
                size: 300
            }, {
                startAngle: -45,
                endAngle: 45,
                background: null,
                center: ['75%', '145%'],
                size: 300
            }]
            var chartooltip = {
                enabled: false
            }
            var chartyaxis = [{
                min: -20,
                max: 6,
                minorTickPosition: 'outside',
                tickPosition: 'outside',
                labels: {
                    rotation: 'auto',
                    distance: 20
                },
                plotBands: [{
                    from: 0,
                    to: 6,
                    color: '#C02316',
                    innerRadius: '100%',
                    outerRadius: '105%'
                }],
                pane: 0,
                title: {
                    text: 'VU<br/><span style="font-size:8px">Channel A</span>',
                    y: -40
                }
            }, {
                min: -20,
                max: 6,
                minorTickPosition: 'outside',
                tickPosition: 'outside',
                labels: {
                    rotation: 'auto',
                    distance: 20
                },
                plotBands: [{
                    from: 0,
                    to: 6,
                    color: '#C02316',
                    innerRadius: '100%',
                    outerRadius: '105%'
                }],
                pane: 1,
                title: {
                    text: 'VU<br/><span style="font-size:8px">Channel B</span>',
                    y: -40
                }
            }]
            var chartplotoptions = {
                gauge: {
                    dataLabels: {
                        enabled: false
                    },
                    dial: {
                        radius: '100%'
                    }
                }
            }
            var chartseries = [{
                name: 'Channel A',
                data: [-20],
                yAxis: 0
            }, {
                name: 'Channel B',
                data: [-20],
                yAxis: 1
            }]
            $('#container').highcharts({
                chart:chartype,
                title: chartitle,
                pane: chartpane,
                tooltip:chartooltip,
                yAxis: chartyaxis,
                plotOptions:chartplotoptions,
                series: chartseries
            },
             // Let the music play
        function (chart) {
            setInterval(function () {
                if (chart.series) { // the chart may be destroyed
                    var left = chart.series[0].points[0],
                        right = chart.series[1].points[0],
                        leftVal,
                        rightVal,
                        inc = (Math.random() - 0.5) * 3;
                    leftVal = left.y + inc;
                    rightVal = leftVal + inc / 3;
                    if (leftVal < -20 || leftVal > 6) {
                        leftVal = left.y - inc;
                    }
                    if (rightVal < -20 || rightVal > 6) {
                        rightVal = leftVal;
                    }
                    left.update(leftVal, false);
                    right.update(rightVal, false);
                    chart.redraw();
                }
            }, 500);
        });
        });
    </script>
</head>
<body>
    <div id="container" style="width: 600px; height: 300px; margin: 0 auto"></div>
</body>
</html>

Highcharts VU Meter Chart Example

Example

Result