Skip to 11:30 to hear the sounds and how they roll in. This is a great video that explains quite a bit about how the car was made and a lot of insight into the process.
The sounds begin to come out of the speakers and starts to change between 50-100 km/h and again over 140:
The sounds begin to come out of the speakers and starts to change between 50-100 km/h and again over 140: