Introduction
Pitch Scaling
Pitch scaling is the process of changing the pitch without affecting the speed.
Pitch Shifting
Pitch shifting can be defined as pitch scaling implemented in an effects unit and intended for live performance.
Some applications of these techniques include:
Music production: Pitch shifting is commonly used in music production to tune vocals and instruments, or to create special effects such as the "chipmunk" effect.
Film and video game sound design: Pitch shifting can be used to create tension and suspense in film and video game soundtracks by altering the pitch of certain sounds.
Speech and voice processing: Pitch scaling and pitch shifting can be used to change the pitch of a person's voice, for example, to make a man's voice sound higher or a woman's voice sound lower.
Voice recognition systems: Pitch shifting is often used in speech recognition systems to adjust for variations in pitch due to factors such as speaker age, gender and accent.
Audio restoration: Pitch shifting and pitch scaling can be used to correct issues caused by changes in the pitch of recorded audio such as tape stretching.