sure you can, in the def file in the part that says bgm put this:bgm = (name of the file).mp3i hope this helps you
So when I make character endings all I have to do is type song.mp3 and they'll take the song from the data file?
Yup, an basic intro or ending could be made in 30 min., it's just thing of converting files.be sure that you type that part like these: bgm = (name of the song).mp3 ; the file can be mp3 or ogg.make sure that you write exactly the name of the file, a space or period could make the ending fail.
And make sure you can play MP3's normally (like as part of a fight) if you can't you need to add a plugin to do so.