static audioSampleEntry(reader) {
    reader.skip(6); // Skip "reserved"
    reader.skip(2); // Skip "data_reference_index"
    reader.skip(8); // Skip "reserved"
    const channelCount = reader.readUint16();
    reader.skip(2); // Skip "sample_size"
    reader.skip(2); // Skip "pre_defined"
    reader.skip(2); // Skip "reserved"
    const sampleRate = reader.readUint16() + (reader.readUint16() / 65536);

    return {
      channelCount,
      sampleRate,
    };
  }
Parses an audio sample entry box.
@param {!shaka.util.DataViewReader} reader
@return {!shaka.util.ParsedAudioSampleEntryBox}