I'm guessing English isn't your primary language. I'm trying to think of how to explain what canned means. The best I way I can think of is it is a predefined response that is triggered by and event. In the sim you can run over a curb and the physics engine can ether trigger a canned response where it just vibrates the wheel exactly the same way every time or you can have a simulated response that is tied to the physics engine where the wheel pulls left and right each time the wheel goes up and down on the undulations of the curb. Another example would be backfire sounds when downshifting. In rF2 those sounds are canned. They are prerecorded. Sometimes the modder will record several of them and they are selected randomly so it isn't as obvious that it's canned prerecorded. The alternative would be a physics engine that fully simulates an engine and dynamically generates a back fire sound. Obviously this isn't happening anytime soon due to the limits of modern CPUs. This is just an example. It isn't always practical to simulate everything, but I would prefer everything be simulated over canned.