How do you rip super old games?

I can't even get the sound to play.

I'd like:
Atomic Bomberman

Skunny Kart

River Run

I think it's useless to find a converter so I bet I probably have to run the games in DOSbox or some DOS emulator and just directly rip it manually.

Anyway the files are:

.RSS
.SNG
just your general SOUNDBLASTER stuff

Well you can record them in DOSBox by pressing Ctrl+F6.

Don't worry if the game's audio seems to jump, when you listen to it afterwards, those jumps are no where to be heard.