The Super Nintendo homebrew scene has been having a blast with byuu's MSU-1 chip. It's an aftermarket cartridge expansion chip (similar to the SuperFX) that allows native playback of CD quality audio. With it, modders were able to recently add streaming CD audio and full motion video to The Legend of Zelda: A Link to the Past. Natively! Today, the chip is breathing new life into Mega Man X.
Coming from Paulie Retro:
"Recently a CD quality music patch/mod was released on romhacking.net. Credit for this hack goes to Michaël Larouche AKA DarkShock - Programming/hacking, and TheRetromancer - Music programming, minor cleanup. If you have either a particular emulator or an SD2SNES flash cart, you can play Mega Man X with nearly all of the background music replaced by CD quality audio tracks. While there is definitely charm in the original Mega Man X, with it being some of the greatest video game music ever, there is something cool about playing the game with music recorded by an actual band covering the soundtrack.
I'm sure many who don't have the capability of doing this are curious as to how it sounds while playing, so I've created this video. It gives you a small bit of most pieces of music in the game, including the title screen, intro level, stage select screen, password screen, boss select screen, as well as the first 30 seconds of each Maverick's stage. In this video I"m playing this directly on my SNES with my SD2SNES flash cart."
To enjoy this patch you will need to have a legally obtained original Mega Man X SNES ROM. Full instructions on how to patch this ROM can be found here, or you can refer to this patching guide on YouTube. Keep in mind this is only playable on the original hardware via SD2SNES, or by emulation via byuu's higan.
Thanks to Joseph for the tip!