This my sound mod on the Porsche 919 hybrid, I hope you'll enjoy it !
As you can see in the video, the hybrid system stops at 260 km/h just before the 7th gear because it's impossible to map the sound of the electric motor in accordance with the hybrid deployment. I got rid of the all time electric sound in the kunos version so that's why i did that, and by the way it's more realistic imo.
If you want to change the volume of the electric motor : you can adjust it in game with the native sound app, just change the "transmission" and the "wheel" channel as you wish. Transmission is for the acceleration sound and wheel for the braking sound, be careful to put the same value in these channels to have the same volume in acceleration/braking. Be aware that the wheel channel affect the tyre skid volume too.
Don't be afraid to give your opinion
Installation : Extract the two file included in the archive in : Program Files (x86)\Steam\steamapps\common\assettocorsa\content\cars
(obviously don't mind the changelog.txt)
Real footage where i took the samples :
Sorry for my bad english