Music in BGE?

I know the BGE can support wav files which are usually sound fx, but how do you get music in the BGE? Any help would be greatly appreciated.

go to the scene tab and click on the thing that looks like sound waves.
you can import .wav files from there

you can also use external sound systems like pygame. Then you can use OGG for small files, and you can have many many more sound effects compared to the sound system in the BGE. They have modules for bot background music and sound effects. I think you can have 1 music, and 8 sounds starting and playing at the exact same time.