update: v.0.2
Ok, here is the promised version.
@Lazy Takumi : To amplify the diff noise volume you can use the audio master app ingame, too. Maybe you should activate the DEV APPS:
o activate it go to xxx\SteamApps\common\assettocorsa\system\cfg and open the assetto_corsa.ini.
There you have to change ENABLE_DEV_APPS=0 from 0 to 1 and then just save it.
I set Engine noise to 10 and the Transmission noise to 8 ( and for Gentle Mind Perfomance Mods 2), but if you like to hear the tranny crying you can set the value to 10, reduce all other values and make you pc master volume higher.
I decide to make the next version with high quality footage from 4a_ge 20V dyno run, that i find coincidentally. For that i used cubic interpolation and a Granular Pipeline Synthesis like GTA5, Dirt Rally, NFS etc, to create samples from a engine noise with increasing and decreasing rpm: For this i use Unity and C#. The program is almost finished! Maybe you can record the real diff, tranny, horn, skid and bodywork noise from your Hachiroku, if she is still alive, in high quality and send me the sound files? Or you visit me next time when you went to the Sachsenring, I live 20km away. Next week i get my Tascam so i can record my 2.5 V6 N/A
Best Regards Just.