Help Changing pitch of Sound Clip SFX

Other Hardware Audio
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*I am "hacking" a model train in order to control it with my phone via bluetooth, this parts pretty much done.

*I am having trouble researching how I should go about giving it sound effects.

*I would like to take this route - #15 How to make a Car game - Unity 3D Tutorial - Engine Sound - YouTube - where you vary the pitch of the short sound clip depending on the speed of the model. But can arduino easily change the pitch of a sound file?

*Any other ideas/methods I should consider?

*I think tinkering with a dcc decoder is a waste of time, if you dont know what that is dont worry about it its not important.

Thanks for reading

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I have found a lot juicy stuff by expanding my search to scale trucks and rc planes, i have a lot of reading to do in the morning (: