If so, how does it work?

Is it bar by bar?

Do I just select bars and then generate multiriffs? How do I indicate which track to generate them for?

How is the time? Does it generate a small set of bars, say 4 bars, really quickly?

Do you have to freeze everything else to get this to work?

Just very curious as to how this has been implemented. I'll be upgrading before the sale ends but kinda curious now.