Has anyone figured this out yet? I'm puzzled. It seems impossible.

Did you even try, dude?

What is that supposed to mean? Of course, dude, I'm looking through the audio section all I see is Music Track and Music Type. Under music track I don't see a thing about importing a music file. When I try to make a new track it lets me select an existing track. That is all.

From what I've read all you do is right-click, "new", just like with everything else, and select a .wav file from your computer, then assign where the music plays/under what conditions.

Ah, there's a teeny tiny radio button that I couldn't see from here. (I'm using my sofa PC.) Lol.

Closed per OP request.