If sound instances are imported from older projects the autopitch value is incorrect, it shows as a small fraction of what it should be (0.34 instead of 1515.55 in designer) which causes it to get pitched up really high.
Hi,
Thanks for reporting this bug. We have just release a new patch release of Studio with a fix for this. It is available for download at http://fmod.com/fmod-downloads.html
Thuan