dearest all, my hobby is to create music using the simplest method of recording my music track by track. first my guitar, then my voice, using my very simple computer mic. recently, after all these years, i suddenly encountered a problem! it seems like i can no long "dub" the the other tracks while i record a new one. meaning, when i am adding my voice track (track #2) while playing my background music (track #1), the mic goes into chaos and records track #1's sounds WHILE i sing. i want the mic to be like it used to, to ONLY record my voice while i am playing the first track thru my headphones. why is it doing that? is there a simple way of gettin rid of this problem? help will be GREATLY appreciated!!