PCM support in WebM, and Chrome's WebM implementation
<p>Does WebM support PCM for the audio codec?</p>

<p>I didn't think it did, but I see on the <a href="http://www.webmproject.org/docs/container/#BitDepth" rel="nofollow noreferrer">WebM documentation page</a> that there is support for a <code>BitDepth</code> field with the following comment:</p>

<blockquote>
  <p>BitDepth - Bits per sample, mostly used for PCM.</p>
</blockquote>

<p>If WebM does support PCM, does Chrome's implementation?  And if it does, what is the appropriate content type for use with MediaRecorder?  These all return false:</p>

<pre><code>MediaRecorder.isTypeSupported('video/webm;codecs=h264,pcm');
MediaRecorder.isTypeSupported('video/webm;codecs=h264,wav');
MediaRecorder.isTypeSupported('video/webm;codecs=h264,adpcm');
MediaRecorder.isTypeSupported('video/webm;codecs=h264,pcm_s16le');
MediaRecorder.isTypeSupported('audio/wav');
</code></pre>