Its been so hard for me to think of a useful sound engine framework, using UML, y have got to think of a bunch of classes that might help me to play sounds and move them arround the listener...but i cant figure out future design problems...cause sound its too abstract to see it in my mind. here is what i've got: public class Audio <<abstract>> //it has attributes like (x,y,z) buffer,source,etc. public class Ogg : public Audio public class PlayList //its an array or a hashmap of Audio objects public class Player //takes the Audio Objects from the PlayList and plays them public class SndManager //loads the playlist and acts as a Facade for the Game subsystem....thats all. can anyone help me with this crappy design?