Now, before I say anything more, I should mention that I have no skills in programming or creating NES games or even able to make music and was just tinkering around. Anyways, I went and downloaded both the original and NSF version of FamiTracker and a NSF of the music for Super Pitfall. After converting the NSF to a FTM so FamiTracker can use it, I looked at two songs on there. One was the main theme you hear over and over again while playing and the other was the balloon song. I noticed that the main theme didnt use the second music track at all while the balloon did. I decided to add notes to the second track on the main theme and play it. It played the notes along with the original song. I think that you dont need a new music program in the game, you just need someone to edit the song to add more notes and use the second track to fill in the empty space to make the song sound better. If my guessing is correct, you may be able to do that by using FamiTracker to edit the song, save it back as a NSF, and then find the location its at in the ROM and paste it in. Remember, Im not someone who knows this stuff and just guessing and stuff, but if it works, then youll be able to have better music in the game.