file inversion in Logic audio?

i know there’s a way to do this but i haven’t got logic running at the mo…so this really isn’t helpful.
however, if nothing works, and presuming you’re on a mac (as i believe they stopped making logic for pc at version 5?) get Audacity. it’s free and pretty damn good for what it is. there’s an invert (flips the wavelength horizontally) and a reverse function too.

I’m VERY sure there’s an option in logic though, i think anisina is on the right tracks. will say something more coherent after work