"In music, a note is a symbol denoting a musical sound. In English usage, a note is also the sound itself.
Notes can represent the pitch and duration of a sound in musical notation. A note can also represent a pitch class.
Notes are the building blocks of much written music: discretizations of musical phenomena that facilitate performance, comprehension, and analysis.
The term note can be used in both generic and specific senses: one might say either "the piece ´Happy Birthday to You´ begins with two notes having the same pitch", or "the piece begins with two repetitions of the same note". In the former case, one uses note to refer to a specific musical event; in the latter, one uses the term to refer to a class of events sharing the same pitch. (See also: Key signature names and translations.)" - (en.wikipedia.org 08.10.2021)
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