node-red-contrib-speaker/speaker/speaker.html

This node accepts PCM audio data and plays it to the speakers

<script type="text/x-red" data-template-name="speaker out">

    <div class="form-row">
        <label for="node-input-name"><i class="icon-tag"></i> Name</label>
        <input type="text" id="node-input-name" placeholder="Name">
    </div>
    <div class="form-row">
    	<label for="node-input-channels">Channels</label>
	    <select type="text" id="node-input-channels">
	      <option value="1">1</option>
	      <option value="2">2</option>
	      <option value="3">3</option>
	      <option value="4">4</option>
	      <option value="5">5</option>
	      <option value="6">6</option>
	      <option value="7">7</option>
	      <option value="8">8</option>
	    </select>
  	</div>
    <div class="form-row">
    	<label for="node-input-bitDepth">Bits per sample</label>
	    <select type="text" id="node-input-bitDepth">
	      <option value="8">8</option>
	      <option value="16">16</option>
	      <option value="24">24</option>
	    </select>
  	</div>
  	<div class="form-row">
    	<label for="node-input-sampleRate">Sample rate</label>
	    <select type="text" id="node-input-sampleRate">
	      <option value="11025">11,025 Hz</option>
	      <option value="22050">22,050 Hz</option>
	      <option value="44100">44,100 Hz</option>
	      <option value="48000">48,000 Hz</option>
	      <option value="96000">96,000 Hz</option>
	      <option value="192000">192,000 Hz</option>
	    </select>
  	</div>
  	
</script>

<script type="text/x-red" data-help-name="speaker out">
    <p>This node accepts PCM audio data and plays it to the speakers.</p>
    <p>The input should be a raw buffer containing the audio on <b>msg.speech</b>.</p>
    <p>It can be used with the IBM Watson Text to Speech service on Bluemix.</p>
    <p>You can define :</p>
    <ul>
        <li>the number of audio channels (default: 2).</li>
        <li>the sampling resolution (default: 16-bit).</li>
        <li>the sampling rate (default: 11,025 Hz).</li>
    </ul>
    <p>These default values are used by the IBM Watson Text to Speech service on Bluemix.</p>
    <p>The audio parameters can be overwritten by <b>msg.channels</b>, <b>msg.bitDepth</b> and <b>msg.sampleRate</b></p>
</script>

<script type="text/javascript">
    RED.nodes.registerType('speaker out',{
        category: 'output',
        color:"#3fadb5",
        defaults: {
            name: {value:"Speaker Out"},
            channels: {value:"2"},
            bitDepth: {value:"16"},
            sampleRate: {value:"11025"}
        },
        inputs:1,
        outputs:0,
        icon: "bridge.png",
        align: "right",
        label: function() {
            return this.name;
        },
        labelStyle: function() {
            return (this.name)?"node_label_italic":"";
        }

    });
</script>