This game just keeps getting better and better, I've spent a good few hours on it so far and I'm very impressed.

On the PS4 when playing online I've seen a speaker icon appear beside a players name while a track is on the loading screen, presumably this is indicative of the person speaking through their mic. Thing is, I can't hear anything - using a wheel I have the controller turned off, and the pit engineer comes through the amp speakers. What am I doing wrong?