Pitch (music)

Pitch is a perceptual property of sounds that allows their ordering on a frequency-related scale,[1] or more commonly, pitch is the quality that makes it possible to judge sounds as "higher" and "lower" in the sense associated with musical melodies.[2] Pitch can be determined only in sounds that have a frequency that is clear and stable enough to distinguish from noise.[3] Pitch is a major auditory attribute of musical tones, along with duration, loudness, and timbre.[4]

In musical notation, the different vertical positions of notes indicate different pitches. Play top  & Play bottom 

Pitch may be quantified as a frequency, but pitch is not a purely objective physical property; it is a subjective psychoacoustical attribute of sound. Historically, the study of pitch and pitch perception has been a central problem in psychoacoustics, and has been instrumental in forming and testing theories of sound representation, processing, and perception in the auditory system.[5]