ss indication labeled Track Buffer.<p>

<p>This Track Buffer then flows to a green box labeled Audio Decoder, which
then flows through a closed switch, which then also continues to the same
summing junction previously mentioned in SourceBuffer 1, which connects to the
Audio Device.</p>

<p style='text-align: right;'>With thanks to <a href='https://lists.w3.org/Archives/Public/public-apa/2016Jan/0014.html'>J. Foliot, Deque Systems</a></p>

<figure>
  <figcaption>Media Source Pipeline Model figure</figcaption