Have you run the file? Does it work and play sound?
If so, then you are probably right, but then you won't get the sounds by disassembling (although disassembling may tell you where they are). But understanding assembly is hard, so you need to be really good to know what's going on.


If you disassembled the code, then you can copy some functions (provided you find them) to your own code, but they are unlikely to work if the code is old.