I finally did it! I put in a new song! The problem was this: I was using the wrong program to get the correct code to make the song play correctly. I was using FamiTracker when I should have been using FamiStudio. I guess I should have finished this back when I knew how to do it correctly. I wrote a note to my future self in case I forget again. Now tomorrow I can put in the soap in the game. Or maybe later today. I don't know. I just woke up and an hour of getting angry is enough for one day.