I have a question about high speed dubbing and the discs which you can do this on. It says on the info that came with it it does 32x speed dubbing but you can't get discs at this speed. Also I tried it on high speed with a 4x disc and seems to work, I did a 2 hr film in about 15 mins. I the tried it again on high spped dub with a 1x disc and it didn't try to high speed dub it? How does it know its a 1x disc ?