Well, my soundcard isn't quite what matters. I mean, a good sound card will make a lot of difference, but seeing as how I'm using samples (wav files and soundfonts) it really doesn't matter so much. It's just what you do with them. And you're right about the key change. I wanted to do that, but the final song does not have a key change. Maybe I will work on it later again, maybe I won't. For now, I'm working on a new song :p