Do these 7 new engine sounds come out of our limit of 16 total sounds in GPL set by the slider in the "Options" Page?
Also, a common complaint about GPL is that the other engine sounds when racing in a pack of cars are too loud and drown out your own engine and tyres, presumably we could now cut the volume levels of the old sound samples that the other cars use? That might allow us to run the maximum number of sounds in the "Options" menu which would add to the immersion of the game, the only downside would be quiet replays which I'm sure most people could live with.
The 7 new engine sounds do not count against the setup menu 16 sound limit. They are played in addition.
Internally, the patch continually plays all of the 7 additional sounds, but each sound is played at different volume levels depending on the sound set designer's plan. I adjusted their overall sound level though so that they are compatible with the AI volume.