pitch explained

Pitch is the perceptual quality of a sound that allows us to judge it as higher or lower.‍​‌​‍​‍​‍​‌​‌​‍​‍​‌​‌​‌​‌​‍​‌​‌​‌​‌​‍​‍​‌​‍​‍​‌​‌​‍​‌​‌​‌​‍​‍​‌ Physically, pitch corresponds to the frequency of a sound wave, measured in Hertz (Hz). Concert pitch standardises A above middle C at 440 Hz (A440), though some orchestras tune slightly higher for a brighter sound. The Western chromatic scale divides the octave into twelve equally spaced semitones in equal temperament tuning. Pitch is notated on the staff using a clef to establish reference points — the treble clef for higher instruments and the bass clef for lower ones. Intervals measure the distance between two pitches. Absolute pitch (perfect pitch) is the rare ability to identify any pitch without a reference note. Relative pitch — identifying intervals between notes — is more common and can be developed through ear training and solfège.