So, I'm really just looking for feedback/experiences from those of you who have worked with other musicians in creating your music for your games.
1) Regarding commissioning artists/musicians, I love the idea of having music from existing projects getting featured in the game (like what Tony Hawk: Pro Skater did for the pop-punk community.) Have any of you experienced any legal problems or found positive ways to interact with other artists in terms of using their music? I also believe in giving a small chunk of change to the bands/artists involved, so what have you considered "fair" in terms of paying them?
2) If not using their music directly, have you collaborated with other musicians in making your game's original compositions? How did that go?