What is the definition of pitch in music and how does it relate to the concept of harmony and melody?

Pitch in music refers to the highness or lowness of a sound. It is determined by the frequency of the sound waves. In music, pitch is essential for creating harmony and melody. Harmony is the combination of different pitches played or sung simultaneously to create a pleasing sound, while melody is a sequence of pitches that form a musical phrase or tune. Pitch plays a crucial role in both harmony and melody by determining the notes that are used and how they interact with each other to create a cohesive musical composition.