There are two different approaches depending on which version you're after.

The soundtracks composed by David Wise, Eveline Fischer, and Robin Beanland are legendary. Fan hacks often bring in new composers who emulate this style. Final Thoughts: The Unofficial Legacy

A powerful frontend that uses the "bsnes" or "Snes9x" cores for advanced video filters and features. Step 2: Explore Legitimate Retro Fan Sites