Direct Audio Question

I''ve been programming DirectX for a while and I''m using 8 now. But I''ve never touched on music portion before and am learning. I went to http://www.gamedev.net/reference/articles/article1689.asp to learn a bit from there but I''m still not sure how to play 2 sounds together w/o deleting the first to play the second. I tried creating different segments and running them through the performance and that did nothing, do I need to create a performance for each channel? Or is there some way to pipe each sound through their own channel? Any links to some tutorials or what not would be helpful.