Hello, I've imported some .aiff files into the arrange window which are from a Yamaha AW4416 project. I want to do the drums again using Superior Drummer. all the aiff files are lined up in sync but I obviously need the drums to be. How do I go about doing this? I'm guessing: I tried bpm counter to get a tempo. This altered from bass guitar to guitar ????? Lining up the pre-recorded audio with the superior drummer was done by eye. Can't be right! Is this a beat mapping thing???? Hellllllppppppp!!!!