You'll want to use the Coyote WT synth that is included for free. Windows does come with a synth, but this one is a midi synth that PGMusic assembled for Win7 64 bit. Uses the same sounds that normal windows uses, but in a nice reliable interface.

Not sure about importing midi into melodist, but by using RealBand you can import midi to any track you want.
A lot of people start the song in BiaB to get the backing tracks done, then open the song in RB to finish up.


I do not work here, but the benefits are still awesome
Make your sound your own!