Formants are the resonant frequencies from the human mouth with vocal tract. If a vocal track is pitch-shifted (without formant correction), the formants are shifted too, and you have a less natural-sounding result. Pitch frequency is the fundamental frequency of the speech signal, and formant frequencies are essentially resonance frequencies of the vocal tract. These frequencies vary among different people and words, but they are within a certain frequency range. Pitch-shifters usually transpose the signal in semitones up or down. Formant shifters do not affect the pitch or timing of a segment. Formant shifters change only the sound of the voice, and you can have a low or high-pitched voice without changing the key. Now all of this is possible to control with “FIREMINT” Pitch & Formant Shifter vocal effect. For the creative powerful pitch warming effect, enable the “Link” button to sync the Pitch-Shifter changes to the Formant-Shifter at the same time. Creatively automate the Formant shifter by selecting between 2 and 4 octaves in the octave range parameter.