For Piapro Studio and Piapro Studio for V4X, please refer to the VOCALOID Wiki's guide on using the parameters.
Piapro Studio for NT's Parameters[]
Voice Drive[]
Controls the trembling aspect of the vocal. It can adjust the strength/nuance of the voice. Certain presets are also available to add rattle and death growl effects to the vocal.[1]
Voice Voltage[]
Controls the tone, strength or weakness of the vocal. It also creates dynamic voice intonation.[2]
Super Formant Shifter[]
The parameter changes the voice quality while maintaining specific traits unique to the original voice. It modulates the voices to be more feminine or child-like.[3]