I am puzzled

I do enjoy getting the games from here but ran into a situation I did download Mario party 6 and 7 from here but to play them I need a mic so I thought I would get one from ebay and its the game cube version of the mic but cant play Mario party 6 or 7 especially 7 without a mic I don't have a mic to use that's why I got that mic and now I cant use it I don't have a mic that the dolphin emulator will recognize to play those games need help or a solution to my problem like I said don't have a mic cause I need one to match the computer especially for the dolphin emulator to recognize and I don't have it