General Music Hacking Guide

I know there's that program that JCE3000GT made, but it doesn't allow one to export/import spc files, but anyways, I need to experiment more with the sound tutorial first, like swapping instruments and sequences. Heck, I need to know more about music first. A challenge to be sure, but it's something I definitely want to learn more about.

A quick off topic question about Breath of Fire 2, but this is still related to SPC hex hacking, halfway through the game, the battle theme changes over (after you get the magic flute for Tunlan). Yes, there are people out there who like the second theme better, but I don't. What values/address need to be located and changed, which control both SPC files? Has anyone found the addresses for BOF2?