in modern music recording - notation - used stave consisting of five lines.Notes are located on the rulers, and between them.

this way on the staff can accommodate only eleven notes, no more.It is less than two octaves, and musicians use much more.How to write the rest of the notes?However, even using additional lines above and below, but if there are more than four, the musician has become very difficult to navigate.Here and come to the aid of special characters - keys.

key value in musical notation

Musician looking at the stave, knows exactly where any note is.This is possible because it has a point of reference, between the second and third rulers is middle C.Therefore, in the above step - the third line - B will note the same octave, and the second - salt, etc.

But any system of reference rather conventional.If you change the starting point
, to change the whole system.So, without resorting to a large number of additional lines can be in any octave.

That is why the Italian music theorist Guido d'Arezzo, who laid the foundations of modern notation, came up with special characters - keys.Their purpose - to specify a starting point on the staff, the note, to which all the others.

Writing treble clef

form key - a modified Latin letters.In addition to the syllabic system (do, re, mi, etc.) there is a more ancient system of music notation - character string.In this system, the salt of the first octave the note indicated by the Latin letter G. Namely its position on the staff indicates the treble clef, it covers the second line of the curl.Therefore, it is called the "key salt" and a form of it - a modified letter G.

Using treble clef, you can without any problems to write notes in the range of the small octave to the salt of the fourth.It is in this range of violinists play, so the key is called a treble.

But once there was another treble clef for higher tessitura.He wrote in the first line, placing there the salt of the first octave.This key is used in France in the XVII century, so it is called Old French.

Sometimes treble clef below or above a little added eight.This means that all notes should be played respectively lower or higher octave.

treble clef In addition, there are others: the key F (bass, baritone and bass profundovy) and the key to (alto, tenor and the mezzo-soprano).