So I have just upgraded my home PC. The new Gigabyte Z790 Gamin X AX motherboard has a single 3.5mm line out which serves as a 5(7):1 output and mic in. My speakers have a lead to connect to three sockets (green/yellow/black). I've asked both Gigabyte and Logitech for help to set this up or suggestions on a cable or adaptor which would allow me to set this up. No help sadly. Can anyone help? I would rather not have to buy a dedicated soundcard just to fix.