This is an older video, but it only recently came to my attention and it's definitely worth sharing.
StarTropics is one of the few arguable classics from the NES era without any modern updates, but it's a game many of us fondly remember. This video points out the flaws in the game's music, and the story of why the music is broken is an interesting look at the technology behind the NES.
The second song was hurt due to a bug, and of course there was no way to "patch" NES cartridges.
The video is worth your time, and it's amazing to hear these two songs, as they were intended, for the first time. Enjoy!