In music, a tuplet (also irrational rhythm or groupings, artificial division or groupings, abnormal divisions, irregular rhythm, gruppetto, extra-metric groupings, or, rarely, contrametric rhythm) is "any

rhythm Rhythm (from Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed ...

that involves dividing the

beat Beat, beats or beating may refer to: Common uses * Patrol, or beat, a group of personnel assigned to monitor a specific area ** Beat (police), the territory that a police officer patrols ** Gay beat, an area frequented by gay men * Battery ...

into a different number of equal

subdivisions Subdivision may refer to: Arts and entertainment * Subdivision (metre), in music * ''Subdivision'' (film), 2009 * "Subdivision", an episode of ''Prison Break'' (season 2) * ''Subdivisions'' (EP), by Sinch, 2005 * "Subdivisions" (song), by Rush ...

from that usually permitted by the

time-signature The time signature (also known as meter signature, metre signature, or measure signature) is a notational convention used in Western culture, Western musical notation to specify how many beat (music), beats (pulses) are contained in each measu ...

(e.g., triplets, duplets, etc.)" This is indicated by a number, or sometimes two indicating the fraction involved. The

notes Note, notes, or NOTE may refer to: Music and entertainment * Musical note, a pitched sound (or a symbol for a sound) in music * ''Notes'' (album), a 1987 album by Paul Bley and Paul Motian * ''Notes'', a common (yet unofficial) shortened version ...

involved are also often grouped with a bracket or (in older notation) a slur. The most common type of tuplet is the triplet.

Terminology

The modern term 'tuplet' comes from a

rebracketing Rebracketing (also known as resegmentation or metanalysis) is a process in historical linguistics where a word originally derived from one set of morphemes is broken down or bracketed into a different set. For example, '' hamburger'', originally ...

of compound words like quintu(s)-(u)plet and sextu(s)-(u)plet, and from related mathematical terms such as "

tuple In mathematics, a tuple is a finite ordered list (sequence) of elements. An -tuple is a sequence (or ordered list) of elements, where is a non-negative integer. There is only one 0-tuple, referred to as ''the empty tuple''. An -tuple is defi ...

", "-uplet" and "-plet", which are used to form terms denoting