I have Just upgraded almost my whole system, MB is a MSI Z390 pro gaming carbon, processor is Intel i7 8700, 48 gigs RAM, sound card is Creative labs soundblaster Z, I have tried all and every suggestion on here and then some. I can hear the game fine, footsteps, shots, deathjs..ect...just cannot hear anyone talk or anyone can hear me. When i press Z, i see the chat speaker, but no one can hear me. I have tested my mike in the soundblaster set up and can hear it fine, in COD when i go to sound settings, I can see the chat bar move when i talk...I am at a loss...just reformatted my whole system again..will let you know if that fixes it