I love how it sounds when you're driving your car through a tunnel, sounds almost realistic! The sounds in this game are amazing compared to GT5, which I've been a die hard fan until now. Sound is very important to me, especially in a racing, car sim. It makes the game come alive. With that being said, I wish they had a track with a long tunnel, like a mile or more, just so that i can take my car for a spin and WIDE OPEN THROTTLE it all the way through. The sound is orgasmic! I wish GT5 got that right, let alone the sound period. There's a highway track with a very long tunnel in GT5, but you can hardly notice a difference in the way it sounds when driving through it. But in Forza, you can clearly hear the difference, the sound is amplified and there's this nice reverb echo, just like in real life.