Pitch

The perceived high or low tone of a sound. Pitch changes according to sound frequency, with lower frequencies producing low pitch and higher frequencies producing high pitch. Specific pitches or frequencies are assigned a letter (or note), for example concert A is 440Hz. Concert A is the basis for ‘concert pitch’ tuning which ensures all instruments within an ensemble are in tune with each other. Concert pitch is not the only tuning standard but can be considered the modern default.