I have a Sega Genesis, N64, and GameCube hooked up via RF adapter. When I try the Sega I get picture and sound. Then when I try the GameCube(which uses the same RF adapter as the N64) I get picture and sound. But when I plug in the adapter to the N64 and try it I get nothing. I have hooked the N64 up thru composite cables and I get both picture and sound but not when I use the RF adapter. I don't want to use composite because I have the one spot for it and the PS2 needs it.