In Emulators / NES ROMs

Im looking for any information about what the title says.

I want to learn some of the songs for sega/SNES/Gameboy like i can do with nsf, breaking up each harmony/waveform. what are sega genesis/snes/gameboy sound files called? and how can i play them?

also i think i remember reading about an NES player that actually played the notes on a keyboard gui. it would be great if anyone could refresh my memory as to what its called

the sound format for the SNES is .

players should be listed on those pages.

any other formats can be found here: