Hi, I tried it for the first time and after a while I checked it.

You only make a new project, with a microphone track for example. then, on the right window, you select audio. then you can import from itunes for example.

draw your gb window to the right of your screen. then open finder and draw the window to the left.

Now you can draw a .wav file in the window of GB (you see the little sign +) and than the file will be convert

You can now draw each wav file to GB as a new track. When you are ready, you can hear the song and you can mix like professional studio. O.K., I prefer Logic, but it´s also possible in GB.

I hope you understand me, my English is not so good, I´m from Germany.

Regards Paul