By a fella named Prince Marph over on FEShrine.
This patch modifies the code oh-so-slightly to resemble Golden Sun’s parameters, so that it sounds clearer and more vibrant.
I would suggest coupling this patch with new samples.
It changes like 3 parameters so that the sound comes out clearer. Namely frequency but with this you should also be able to get more tracks to play (like 2).
This does make it more CPU extensive though, so if you put in something really crazy you might have slowdown problems, but it seems to be fine at the moment.
It doesn’t sound great but if you imported Golden Sun’s samples it would sound very similar to Golden Sun. I didn’t include the samples though because some people might have added stuff to their rom and I don’t want to cause any conflicts, while this would change something most people wouldn’t even have touched in the first place.
Just a note: this does make some of the default music sound a little janky (some underlying parts of the songs were obviously never meant to be emphasized this way), and if I recall correctly one or two crash the game.