Add FDS BGM or port the patch to the FDS disk

[eadmaster]

As described here the original Jap release had different BGMs and SFXs using the extra FDS sound channels.

[ShadowOne333]

The idea does sound interesting.
However, I don't think porting them to the NES version would be feasible.
Only option would be to port the entirety of Redux to the FDS version, but that would be a whole project on its own.
A lot of address would need to be shifted around, new free space would need to be located, and that's assuming the free space available in each bank is enough for some of the new features.

I would have to put this as an afterthought, once the whole Redux project is finished.