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You might find this software interesting:

https://www.youtube.com/watch?v=RKT-sKtR970

I don't know if any of the state of the art flight/driving simulators are doing this kind of engine noise synthesis already, but they should be.

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The problem here is mostly computational cost. Simulating finer grained details needs a proportionally higher tick rate. In this case although the engine sim seems to be 2D and the gas sim 1D but both would need really high resolution to output sound synthesis. Driving games for now are largely putting that work into tyre dynamics as it’s such an integral part of the driving experience. Maybe there’s head room to do this x number of cars on the track but I don’t think it’s a foregone conclusion that they can just slap in a similar simulation.

With modern systems having so many cores there's plenty of compute available for at least simulating the player's engine sounds more elaborately... They don't have to do it for every vehicle in the sim.

That’s certainly the hope how well it matches reality is the problem.

Thanks!

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