Hi Quality Audio from SNES hardware (MSU-1) with SD2SNES Pro
The SNES is capable of near-CD audio quality audio with the MSU-1 hardware.
Enhanced audio beings at 8:37
Edit:
This requires a patched rom file with MSU-1 support with the additional fan-created audio tracks placed in a folder with the patched rom on the SD card.
Using a flash cart such as the SD2SNES one can play rom hacks that add high quality audio to original games
Also works in this emulator: https://byuu.org/bsnes/