Classic Halo 2 Campaign/Multiplayer has no audio

Please help someone or the devs one I have no Sound for halo 2, online or In the campaign. It’s very frustrating and we’ll unenjoyable when trying to play. Can some one please help me I just got it back again for Christmas And can’t beat them untill i play this one, I’ve tried reinstalling it and deleting my save data but still no audio at all. I thank you all for your time and I hope to get a response soon, really was looking forward to MCC…