Musical note
sign used in musical notation to describe a pitched sound (frequency + duration) / From Wikipedia, the free encyclopedia
In music, a musical note, otherwise referred to as a musical tone or simply a note or tone, is a small bit of sound of a note system known as the solfege, especially in the United States, similar to a syllable in spoken language. For example: in the first two lines of the song "Twinkle, twinkle, little star, how I wonder what you are" there are 14 notes: one for each syllable.
Confusingly, the word "note" can also mean the pitch of a note (how high or low it is). For example: the whole of the song "Twinkle, twinkle, little star" can be played using six different notes: C, D, E, F, G and A.
The word "note" can also mean the written symbol of the note, which shows the note value.
Nearly all music is made up of notes. Music without notes might be sound effects.