FF6: Dancing Mad (MSU-1 Hack)

Hey. This is fricking phenomenal! Well done Madsuir! 

Though, question. I would like to enter my own versions of a few songs that I have seen, or from other games into my hack. I used audacity to change the music from MP3 into a pcm, but it's not showing up in game. It just has the basic music playing. (I tried replacing Gogo's music for instance.) Before replacing it is the new song, but then i put mine in and it goes back to default. Placing the Dancing mad version back in changes it again back to the new version. 

Is there a specific setting when exporting that i need the pcm to be, if not could you tell me the process of how you created the song, so i can TRY to replicate your success?

Thanks in advance!