protected static boolean isOpusSpecial(OggPacket packet) {
       byte[] d = packet.getData();
       
       // Is it an Opus Header or Tags packet?
       if (d.length < 12) return false;
       if (IOUtils.byteRangeMatches(MAGIC_HEADER_BYTES, d, 0)) return true;
       if (IOUtils.byteRangeMatches(MAGIC_TAGS_BYTES, d, 0)) return true;
       
       // Not a known Opus special packet
       return false;
   }