What Is The Audi Sound?

What is the “ Audi ” sound? As I sit here and listen to my favorite music, write this post as well as watch the Audi video it occurs to me the video is front stage. I turned the music off and watched the video again; it is incredible how much Audi puts into every detail. You can only imagine if Audi puts this must attention into capturing the sounds their cars make, how much attention they must put into the engineering.