<match value="ftypF4A " type="string" offset="4"/>
      <match value="ftypF4B " type="string" offset="4"/>
    </magic>
    <glob pattern="*.mp4a"/>
    <glob pattern="*.m4a"/>
    <glob pattern="*.m4b"/>
    <sub-class-of type="video/mp4" />
  </mime-type>
  <mime-type type="audio/mp4a-latm"/>
  <mime-type type="audio/mpa"/>
  <mime-type type="audio/mpa-robust"/>

  <mime-type type="audio/mpeg">