This is a hack of Sonic the Hedgehog 2 for Sega Genesis. It changes the frequency of music and sound effects making for a different sounding game. Some music is barely recognizable and the game can feel quite different because of it.

The patch is in xdelta format. The ROM should be in BIN format.

• No-Intro Name: Sonic The Hedgehog 2 (World) (Rev A)
• ROM/File SHA-1: 8BCA5DCEF1AF3E00098666FD892DC1C2A76333F9