It stays natural — formants don't move with pitch
Naive pitch shifting makes a voice sound chipmunked when raised or muddy when lowered, because it drags the singer's vocal character — the formants — along with the pitch. Pitch Corrector keeps the formants in place, so a corrected voice still sounds like the same person. Or shift them deliberately for gender and character effects, independent of pitch.
Formant preserve · independent formant shift