« on: December 28, 2021, 04:35:40 pm »
I don't think that will be possible as the hardware is different in both systems, and the FDS has extra sound channels.
Now some NES games like the Konami ones used extra chips to improve the music capabilities. So something like that may be possible with some header changes, but that may be a step too far for the project's scope.
I do prefer the FDS music for the most part, especially the bell chimes with the Title Screen.
Also, if it would add capacity, believe MMC4 is one mapper that has an extended sound chip, but I can't find details on it when searching the internet. Bisqwit's CV2 Retranslation + Map hack converts ROMs to MMC4 for that purpose, I believe. See the following: https://www.romhacking.net/hacks/1032/ and more importantly his description on which mapper to use here at https://bisqwit.iki.fi/cv2fin/
Edit: Realized I confused the FDS peripheral for the Famicom itself, so removed that reference.