Musical notes they are graphic and sound signals that were created to represent variations in the pitch of musical sound; that is, organize the musical language and facilitate the composition of melodies. There are seven musical notes: Of, Re, Mi, Fan, Sun, There, Yes.
The musical notes, as they are known nowadays, were created by the Italian monk Guido d'Arezzo (992 - 1050 d. C), through the sacred text "Hymn to St. John the Baptist", under the name "ut queant laxi". The monk used the beginning of each phrase to name each of the notes, from which the seven musical notes emerged.
Guido used letters from the Latin alphabet to symbolize the sounds of musical notes, and the most used version of the notes is in English:
C = C
Reverse = D
Mi = E
F = F
Sun = G
There = A
Si = B
In the German version of the musical note system, the letter "B" stands for "B-flat". So, the letter "H" is used to symbolize the "si" in German.
One musical scale it is made up of seven notes, the first note being repeated at the end. Example: G scale = G - La - Si - C - D - Mi - F - G.
Musical notes are written in the so-called "musical scores" or "pentagrams", which consists of a set of five parallel and horizontal lines, separated by four spaces between them.
In the set that helps to build a musical score, there are still the so-called "supplementary lines", which help the pentagrams to express all musical sounds.
Other important symbols in reading or constructing a musical score are the clef, which is placed at the beginning of the pentagram and serves to name the scale of musical notes being used. Example: G scale, A scale, C scale and so on.
Another feature of the musical notes are their variations, which can be lower or higher, depending on the position they occupy along the musical staff.
See also the Definition of Tuning Fork and alphabets.