this is my first md as well as visiting this forum. i need help on my MZ-N420D. When i transfer a song to my MD and play it, there alway seems to be a noise that appears suring playback. I've tried using a new disc, battery, and initializing the disc several times. i also have been having problems converting/transferring certain songs to my MD. although the song is compatible and meets the specifications, i cant convert it and sonic stage freezes as well as my computer during the process. any one know how to help me?