This is my version of Sky Sanctuary from Sonic 3 and Knuckles. I made this using Famitracker, a sequencing program for making 8-bit styled music. This song uses the expansion chip for the Famicom called the VRC7. The VRC7 uses FM Synthesis.
You can find this and any other songs I've covered on Youtube at my Channel; VolcansMusic. If you have any suggestions or concerns, I'll gladly listen!