Pitch adjustment refers to the process of changing the perceived frequency of a sound. This can be done by altering the speed of a sound wave or modifying its frequency through various techniques. Musicians often use pitch adjustment to ensure their instruments are in tune or to create specific effects in their music. In technology, pitch adjustment is commonly used in audio editing software, allowing users to raise or lower the pitch of recorded sounds. This feature is useful for correcting vocal performances or creating harmonies. Overall, pitch adjustment plays a crucial role in both music production and sound design.