every sounds does have a poor mixing in car and are not constant. you do 60kph in the pits and the car is like going back and forth between 50 and 70kph… the low rpm sounds doesn't mix up at all with the high rpm sound. low rpm you have a pretty calm sound(unusual for a race engine) and suddenly, when you get to the mid-high rpm range, the sound starts to get louder and sound a bit more race like. but still, very very bad quality. it's usual for GTR2, but come on. even rFactor did a better quality sound with the exact same sound engine… some cars doesn't even sound like the real ones…