title: How to play GSM files in HTML5
body: <p>I would like to play a GSM audio file within my HTML5 page</p>
  
  <p>In order to do some testing I created the following piece of code</p>
  
  <pre><code>&lt;!DOCTYPE HTML&gt;
  &lt;html&gt;
  
  &lt;head&gt;
      &lt;meta charset="UTF-8"&gt;
      &lt;title&gt;Test&lt;/title&gt;
  &lt;/head&gt;
  
  &lt;body&gt;
      &lt;audio controls&gt;
          &lt;source src="/home/server/Desktop/audiofile.wav" type="audio/x-wav"&gt;
      &lt;/audio&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>Unfortunately this code does not work and and the play button is grey. </p>
  
  <p>Details of audio format with <code>soxi</code></p>
  
  <pre><code>Input File     : 'audiofile.wav'
  Channels       : 1
  Sample Rate    : 8000
  Precision      : 16-bit
  Duration       : 00:00:04.16 = 33280 samples ~ 312 CDDA sectors
  File Size      : 6.82k
  Bit Rate       : 13.1k
  Sample Encoding: GSM
  </code></pre>
  
  <p>Do you understand where the problem is?</p>
  
  <p>Thanks</p>