note

In music, a note is either a unit of fixed pitch that has been given a name, or the graphic representation of that pitch in a notation system (and sometimes its duration) or a specific instance of either, so one can speak of "the second note of Happy Birthday to You" for example. The general and specific meanings are freely mixed by musicians, although they can be initially confusing: "the first two notes of Happy Birthday to You are the same note", meaning, "the first two sounds of Happy Birthday to You have the same pitch.