repeated frames are something that was a problem a few years ago. people were creating "fake" mp3s and looping 15 seconds of a song over and over. scanning for "sound" that has been repeated is what the repeated frames was searching for, but that is out dated, and I would ignore repeated frames. now a days, most mp3s are very high quality and there is hardly any need for the MP3 Checker project.. but I am keeping it available just in case it helps someone.