Basically, what you're aiming to is both almost impossible and almost useless.
Impossible because the FDS sound channel is complex, moreso than any channel of any other expansion sounds used in any other cartridge. In particular it's pitch modulation feature (used extensively in Zelda games) is extremely complex and cannot be easily replicated on other sound hardware.
It's almost useless because playing a hacked ROM on real hardware, for instance an hypotetical Zelda game hacked so that it plays FDS sounds on a cartridge mapper, requires a flashcart. Most flashcarts supports emulating the famicom disk system as well, so if you care about sounds of the FDS you should just as well play the original on your flashcart.
Even if you were to modify directly a game cartridge ROM to have Zelda instead, this would destroy a rare game with expansion sound, which is not desirable.
So basically the only approach which makes any sense would be to use $4011 and play exact records of the sound from the FDS but this usually takes almost 100% CPU time, which definitely is quite a problem.