Engine sounds in racing computer games

Billy Akinbredalik

Hi

Always wanted to know, how these fancy engine sounds come into being.

Is it generated on the fly? If so, how do all these little quirks appear there (like intercooler sound)? Or is it pre-recorded, and if so, how does its pitch changes?

Thanks

Psql D

https://www.youtube.com/watch?v=Yqsrizplujs