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- <title>wavesurfer.js | Split Wave Point Plot Example</title>
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- <h1 itemprop="name">Split Wave / Point Plot </h1>
- </div>
- <div>
- <p>
- The Split Wave Point Plot drawer splits the graphic in two, with the upper half being a plot of
- points defined by time and a range of values. The following example shows the calculated pitch
- at each point in time.
- </p>
- </div>
- <div id="demo">
- <div id="waveform">
- <!-- Here be the waveform -->
- </div>
- <div class="controls">
- <button class="btn btn-primary" data-action="play">
- <i class="glyphicon glyphicon-play"></i>
- Play
- /
- <i class="glyphicon glyphicon-pause"></i>
- Pause
- </button>
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- <h3>How to Enable Split Wave/Point Plot</h3>
- <p>
- Set the <code>renderer</code> option to <code>SplitWavePointPlot</code> and the <code>plotFileUrl</code> to the file containing the time aligned data.
- </p>
- <p>
- <pre><code>var wavesurfer = WaveSurfer.create({
- container: document.querySelector('#wave'),
- renderer: 'SplitWavePointPlot',
- plotFileUrl: 'data.txt'
- });
- </code></pre>
- </p>
- <h3>Providing Point Data</h3>
- <p>The data to be graphed can be provided by either providing a file defined in the <code>plotFileUrl</code> or by passing in an array of data in the <code>plotArray</code> option. The time data does not need to be continous and can have gaps.</p>
- <strong>Note: if the timing of your data does not span the duration of the sound file you should set <code>plotTimeEnd</code> to the total duration of the sound file or the points may not be aligned correctly</strong></li>
- <h4>Data File Format</h4>
- <p>If providing data by loading a file, each line of the file must contain two elements: the time and the value of the point separated by a delimiter (defaults to tab). E.g.</p>
- <pre><code>0.01 123
- 0.02 121
- 0.03 127
- 0.22 120
- 0.23 119</code></pre>
- <h4>Data Array Format</h4>
- <p>If providing data by a javascript array via the <code>plotArray</code> option the array should have the following form:</p>
- <pre><code>[
- {time: 0.02, value: 121},
- {time: 0.03, value: 127},
- {time: 0.22, value: 120},
- {time: 0.03, value: 119}
- ]</code></pre>
- <h3>Options</h3>
- <p>The following additional options can be set when initializing wavesurfer to control the waveform</p>
- <ul>
- <li><code>plotArray:</code> array of objects with time and plot (required unless plotFileUrl is set)</li>
- <li><code>plotFileUrl:</code> url of the file that contains the plot information (required unless plotArray is set)</li>
- <li><code>plotNormalizeTo:</code> [whole/segment/none/values] - what value to normalize the plot to (defaults to "whole")</li>
- <li><code>plotMin:</code> the minimum value to normalize points to. Any value below this will be ignored (defaults to 0)</li>
- <li><code>plotMax:</code> the maximum value to normalize points to. Any value above this will be ignored (defaults to 1)</li>
- <li><code>plotTimeStart:</code> the time included in the plot file which corresponds with the start of the displayed wave (defaults to 0)</li>
- <li><code>plotTimeEnd:</code> the time included in the plot file which corresponds with the end of the displayed wave (defaults maximum plot time)</li>
- <li><code>plotColor:</code> the color of the plot (defaults to #f63)</li>
- <li><code>plotProgressColor:</code> the color of the progress plot (defaults to '#F00')</li>
- <li><code>plotFileDelimiter:</code> the delimiter which separates the time from the value in the plot file (defaults to tab characater = "\t")</li>
- <li><code>plotPointHeight:</code> the canvas height of each plot point (defaults to 2)</li>
- <li><code>plotPointWidth:</code> the canvas width of each plot point (defaults to 2)</li>
- <li><code>plotSeparator:</code> boolean indicating a separator should be included between the wave and point plot</li>
- <li><code>plotRangeDisplay:</code> boolean indicating if the min and max range should be displayed (defaults to false)</li>
- <li><code>plotRangePrecision:</code> integer determining the precision of the displayed plot range</li>
- <li><code>plotRangeUnits:</code> units appended to the range</li>
- <li><code>plotRangeFontSize:</code> the font for displaying the range - defaults to 20</li>
- <li><code>plotRangeFontType:</code> the font type for displaying range - defaults to Ariel</li>
- <li><code>plotRangeIgnoreOutliers:</code> boolean indicating if values outside of range should be ignored or plotted at min/max</li>
- </ul>
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