I just came upon this thread because the music producer I am working with asked me about this issue. IMO the entire business model of PG Music is based on an exchange of dollars (mine) for their sotware which makes use of recordings of other musicians. The implication in everything I have ever seen is that this is acceptable to do.

HOWEVER, when I think about copywright law it is concerning. I think PG Music is walking a dangerous line. And so far it hasn't caused a problem. But IF/WHEN someone does right a big hit I could definitely see this being an issue.

My hope is that when these recording sessions are done they musicians are signing a release that it is a work for hire and they have no future rights to the tracks. That's the only way that I could see this being legal. If they don't then I think BIAB should be clearly marketed as ONLY for amateur and hobby purposes.

I also think it's very telling that PG Music is Canada based. If they were US based this would have probably already became an issue by now.

And FYI it doesn't matter if you have a big hit or not. What matters is how pissed off the artist who's tracks you "stole" cares. Sometimes it's not about the money, it's about the fact they aren't getting credit. I've gotta believe that this whole thing is nonsense though, because how likely is it going to be that they recognized there exact playing in the context of new music being created from their orgiginal playing?