    <a href="../../training/managing-audio/index.html"
             description=
             "How to respond to hardware audio key presses, request audio focus
             when playing audio, and respond appropriately to changes in audio focus."
            >Managing Audio Playback</a>
        </div>
        <ul>
          <li><a href="../../training/managing-audio/volume-playback.html">
            Controlling Your App's Volume and Playback
          </a>
          </li>
          <li><a href="../../trai