A
clef (
French for
key) is a
symbol used in
musical notation that assigns
notes to lines and spaces on the
musical staff. A clef can be thought of as assigning a certain note to a specific line on the staff; adjacent spaces are assigned the notes that follow logically.
There are three commonly used types of clef symbols: the G clef, the F clef, and the C clef, All of these clef symbols intentionally resemble the cursive[?] forms of their respective letters. They have letter names because they assign the note with that name to a particular line on the staff.
Writing an "8" immediately above a clef symbol shifts the notes of the staff up an octave; likewise, writing the 8 beneath the clef symbol shifts the notes down an octave. This notation is used mostly for the G and F clefs.
The
G clef assigns the note G to a line on the staff, determined by the curl of the "G" symbol. It is normally placed on the staff with the spiral originating from the second line; this usage of the G clef is so common that the name
treble clef is often used as a synonym (see below), but the G clef can be placed on other lines: in the
baroque period, for example, the G clef was sometimes placed on the first line of the staff for music with a high range. The G clef on the bottom line is called "French Violin clef" which works for Eb clarinet or Eb trumpet music.
The
treble clef is probably the most widely-used clef, followed by the
bass clef. It uses the G clef symbol to assign the note G above
middle C to the second line from the bottom of the staff. Most
woodwind instruments read treble clef, as well as high
brass,
violins, and tuned
percussion. On the
piano, the right hand usually is written in treble clef, while the left hand is written in bass clef.
The treble clef
Two symbols, both a stylized letter F, are used to represent the
F clef, although the one below is more commonly used. The two dots of the F clef surround the line that represents the note F. The most common use of the F clef is the
bass clef, which places F on the 2nd line from the top of the staff; the name "F clef" is frequently used to mean the bass clef. However, the F clef has historically been used on other lines of the musical staff, most notably on the middle line, when it is known as the
baritone clef. This usage is nowadays very rare, however.
The
bass clef uses the F clef to assign the note F below
middle C to the second line from the top of the staff. Most lower-pitched instruments, such as the lower
brass, strings and
woodwinds read bass clef. On the
piano, the left hand is usually written in bass clef, while the right hand is written in
treble clef.
The bass clef
The C clef resembles two backwards letter 'C's, one above the other. The line that falls between the 'C's is assigned the note
middle C. There are two common clefs that use the C clef symbol: The
alto clef, which assigns C to the middle line of the staff, and the
tenor clef, which assigns C to the second line from the top of the staff. The C clef is sometimes also used to indicate the
mezzosoprano or flautalto clef, which assigns C to the second line from the
bottom of the staff. The C clef on the first line means
soprano clef[?] which works for violin and the clarinet in A.
The
alto clef uses the C clef to assign the note middle C to the middle line of the staff. The alto clef is used by
violas and occasionally by
trombones. It is also used in
vocal music.
The alto clef
The
tenor clef uses the C clef to assign the note middle C to the second line from the top of the staff.
Cellos read the tenor clef; it is also used in vocal music.
Bassoons and
trombones, which normally read the bass clef, use the tenor clef to avoid excessive
ledger lines in extended high passages.
The tenor clef