A feature I haven't seen from any other game is the environment having a effect on car sound.
In Nurburgring, the euro city tracks and the Michelin race track you car hear the car echo in the distance *If volume is set to 3 or lower*. While on Vegas and the other night tracks the Intake sound will create a echo warpy acoustic effect, especially if you double tap the accelerator *Idk how to explain it but that's what it visually looks like in a audio program*. and NY just sounds more racecar-like.
I've tested everycar in the game and only noticed this effect with: F1 LM and CLK-GTR SS, it's strongest with the CLK.
The CLK-GTR sounds quite different when using these camera angles on these particular tracks. I can try to film examples later; but on Vegas it has a unique acoustic effect from 5600-6600 RPMs, while New York has a different effect at the same RPMs. I only noticed the effect because I use the sound of the car to mod into other games and was fiddling around with the properties of said sounds.
The properties of alot of the cars are very unique
Another unique feature speaking of sounds is the cars making the same sounds they make IRL with crackles and pops being heard every once in awhile with certain cars. Like the CLK-GTR you can actually hear the gears *click* at random points when shifting sometimes and with the F1-LM you can hear this aswell. I've only hear the effect on:
Panoz GTR-1
DBR-9
RGT Murcielago
F50-GT
F1 LM *Kinda frequently*
CLK-GTR SuperSport
FXX *Only heard it once with this car*
One of the RUF cars, the C class one I think the RGT but only when a flame pops out the exhaust.
Murcielago LP640
Here you can hear it when they shift to 3rd gear:
Hear you can hear the same effect but it's kind of faint:
And on the F1 LM it's audible from the 4th gear on up here:
There's no audio that i'm aware of that has the F1 LM going full tilt but I can't imagine it would sound different.
Would love to see footage or hear audio of the cars going full-tilt on a dyno like the F50 GT, afaik there are only pics of the F1 LM on the dyno.