It is known as staff (or staff , as indicated in the dictionary of the Royal Spanish Academy ) to one musical notation mode which is based on a structure composed of five straight lines located in parallel and at the same separation distance.
The staves are intended for the writing of music , that is, to have a written record of the notes and other musical signs necessary to interpret a melody. All staff lines, as well as their four spaces, are listed in the bottom-up direction.
At the beginning of the staff the key is placed, which is the symbol which allows each musical note to be related to the location or space it occupies in the staff. This key connects a note with a specific place on the staff, which makes the other notes correspond to certain places and adjacent lines.
The treble clef It is the most popular outside the field of music, although it is very rare to find a score that does not include a pentagram in the key of fa, unless there is talk of a "part" of an orchestrated piece, that is, the line that should Play a particular instrument. Anyway, an experienced musician fluently reads the different keys, in their possible positions. It is worth mentioning that it is possible to alter the key Initial throughout a composition as many times as desired, either accidentally (temporarily) or definitively (until the next change).
Basically, a naked pentagram is useless, since it is impossible to associate a line or a space with a note. After assigning a password, everything changes. However, this is not enough, since if no further clarifications are made, it will only be possible to write melodies in C major or minor (which are relative tonalities).
To understand it graphically, it is very useful to think of a piano; A staff with a Fa code in the fourth line gives us the possibility of using the notes do, re, mi, fa, sol, la y si, unless an accident is indicated throughout the piece. Worth the redundancy, these are the notes belonging to C major and its relative minor, which are excluded many others shades.
That's where the key armor, which plays a fundamental role at the time of to compose A musical work. It consists of one or more flats or sustained (cannot be mixed) that indicate permanent alterations to the seven notes listed in the previous paragraph. To build an armor, it is mandatory to follow an order with the flats, and the opposite for the sharps. In the first case, the sequence is yes my re sol do fa, and to understand its function, we will take as an example the simplest armor of this group, which has only the flat: with this configuration, the two shades that can be reproduced are F major and its relative minor, Re.
After the key armor, the figures that represent the musical notes appear. Each figure indicates the duration of the sound and, according to its location on a line or a space, the musical tone. In case a tone is needed that is not covered by the staff (more acute than that corresponding to the space above the fifth line, or more serious than that of the space below the first line), additional lines and spaces can be drawn .
In addition, there are various signs that turn musical writing into a system very rich and complex; some of them allow to indicate intensity, way of attacking the notes (chopped, sustained, bound), dynamic (make the intensity grow or decrease in a certain portion of the melody).