Sound coming from engine?

I own a 2001 ford mustang v6. There's a bit of a faint sound. Its a bit hard to describe it whenever my RPMs goes higher, the sound sounds more high pitch. I'm thinking it might be the belt since its moves with the RPM. It isn't a squeeling sound. I just want to know if a faint sound is normal for a car of this year

A faint sound is the best you can do? If you think it is the belt remove it you can run the engine for a minute without hurting anything.

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