Letter notation

In music, letter notation is a system of representing a set of pitches, for example, the notes of a scale, by letters. For the complete Western diatonic scale, for example, these would be the letters A-G, possibly with a trailing symbol to indicate a half-step raise--(a "sharp" music|#), or a half-step lowering (flat, music|b). This is the most common way of specifying a note in speech or in written text in English or German. In some European countries H is used instead of B, and B is used instead of Bmusic|b.

Western letter pitch notation has the virtue of identifying discrete pitches, but among its disadvantages are its occasional inability to represent pitches or inflections lying outside those theoretically derived, or (leaving aside chordal and tablature notations) representing the relationship between pitches--e.g., it does not indicate the difference between a whole step and a half step, knowledge of which was so critical to Medieval and Renaissance performers and theorists.

The earliest known letter notations in the Western musical tradition appear in the "Dialogus de musica" (ca. 1000), by Odo, in a discussion of the division of the monochord [Alma Colk Brown, "Medieval letter notations: a survey of the sources," and Medieval Canonics, Jan Herlinger, in "The Cambridge History of Western Music Theory," Thomas Christensen, ed., 2002Cambridge University Press, ISBN 0521623715] .

Guitar chords

Letter notation is the most common way of indicating chords for accompaniment, such as guitar chords, for example Bmusic|b7. The bass note may be specified after a /, for example C/G is a C major chord with a G bass.

Where a capo is indicated, there is little standardisation. For example, after "capo 3", most music sheets will write A to indicate a C chord, that is, they give the chord "shape" rather than its pitch, but some specify it as C, others give two lines, either the C on top and the A on the bottom or vice versa. A few even use the /, writing C/A or A/C, but this notation is more commonly used for specifying a bass note and will confuse most guitarists.

harp, or flat?

In the context of a piece of music, notes must be named for their diatonic functionality. For example, in the key of D major, it is not generally correct to specify Gmusic|b as a melodic note, although its pitch may be the same as Fmusic|#. This is normally only an issue in describing the notes corresponding to the black notes of the piano; There is little temptation to write C as Bmusic|# although these are both valid names of the same note. Each is correct in its context.

Note names are also used for specifying the natural scale of a transposing instrument such as a clarinet, trumpet or saxophone. The note names used are conventional, for example a clarinet is said to be in Bmusic|b, Emusic|b, or A (the three most common registers), never in Amusic|# and Dmusic|# and Bmusic|bb (double-flat), while an alto flute is in G.

Octaves

Note names can also be qualified to indicate the octave in which they are sounded. There are several schemes for this, the most common being scientific pitch notation.

Scientific pitch notation is often used to specify the range of an instrument. Where sharps or flats are necessary for this, these are related to the natural scale of the instrument if it has one, otherwise the choice is arbitrary.

Other note naming schemes

Tonic sol-fa is a type of notation using the initial letters of solfege.

ee also

* Abc notation, a letter notation based file format for computer storage of music
* Helmholtz pitch notation
* Musical notation
* Solfege

References