My main fursona, Neon, has a little squeaky voice but it's not awfully high pitched. I guess you could compare it to Jinx from league of legends, but then a lot calmer and less pitch changes.
Bitoxic, my other main fur, has a voice that DOES change in pitch a lot depending on his mood. He talks with a smooth tone to it, though it's mostly on purpose.
I'd love to go into detail, but man explaining voices is harder than it seems @-@