Better car engine sounds

[CrystalH]

Nice tutorial video. I think that method is quite standard, having few rpm sounds and blending them.

So where did you get the car engine sounds from ? Did you maybe record them (made them yourself) or did you find any with CC-BY licenses ? Only such could be included in game.
As for FMOD heh that is a propertiary library, surely won't be used in a free libre open source project.
But
I think I've seen the code for blending few rpm sounds in sources somewhere. Even if not, it's not very difficult to write it.
Provided of course the new sounds have a lincese allowing them to use here.

Sorry to bump in here, I'm also very interested in new engine sounds, especially if somebody can record them (has the sound recording equipment, knowledge and access to such cars).