Thanks for the responses. I think I have been pitching up and down too fast. I hadn't heard of formant shifts before so I'll learn about them. I don't mind spending some time to get this working as long as I know the general approach to use. I figured that it wouldn't be easy. Maybe this is something that I'll put some ...

I've tried twice to use a repeating sound, but it is hard to get it to sync with when the wheel stops. The sound tends to end abruptly.

The game that I am creating contains wheels that are rolled around in 3D based on player input. Each player has their own wheel. I would like players to be able to hear the wheel rolling. I've tried playing a repeating sound through XACT and adjusting the pitch based on the speed of the wheel, but that does not seem like the right ...