Do you want the sonic 2 sound driver preinstalled in Sonic 1? Here I bring you a disassembly with the driver ready to use. Credits: NotSoFilter: Sound driver from Sonic 1 Optimised project. Theglitchy: Ported the driver Hame(Me): Additions and fixes Spoiler: Source Code https://github.com/ImmortalGlitchy/Sonic-1-PreinstalledZ80SoundDriver Spoiler: ROM https://github.com/ImmortalGlitchy/Sonic-1-PreinstalledZ80SoundDriver/raw/master/s1built.bin Any bug you find you can say it here