In Music notation is a system of writing for music. The term sheet music is used for written music to distinguish from audio recordings. In sheet music for ensembles, a score shows music for all players together, while parts contain only the music played by an individual musician. A score can... musical notation, a bar or measure is a segment of time defined as a given number of See also the beat disambiguation page. A beat is a pulse on the beat level, the metric level at which pulses are heard as the basic unit. Thus a beat is the basic time unit of a piece; when you tap your foot to music, each tap is a beat... beats of a given duration. The word measure is heard more frequently in the For other uses, see United States (disambiguation) and US (disambiguation). The United States of America, also referred to as the United States, U.S.A., U.S., US, America¹, or the States, is a federal republic of fifty states, mostly in central North America. The U.S. has three land... U.S., while bar is used in other English-speaking countries, although musicians generally understand both usages.

Types of barlines. (a) standard; (b) double (1st definition); (c) double (2nd definition); (d) begin repeat; (e) repeat

A bar line (or barline) is a vertical line which separates bars. A double bar can consist of two barlines together, separating two sections within a piece, or a barline followed by a thicker barline, indicating the end of a piece or movement. A repeat barline looks like the second type of double bar but is preceded by two dots, one above the other, indicating that the preceding section of music is to be repeated. The beginning of the repeated passage can be marked by a begin-repeat barline; if this is absent the repeat is understood to be from the beginning of the piece or movement. This begin-repeat barline, if appearing at the beginning of a staff, does not act as a true barline because no bar precedes it; its only function is to indicate the beginning of the passage to be repeated.

Note that the term double bar refers not to a type of bar, but to a type of barline.

In music with a regular Metre is the measurement of a musical line into measures of stressed and unstressed beats, indicated in Western notation by a symbol called a time signature. Properly, metre describes the whole concept of measuring rhythmic units, but it can also be used as a specific descriptor for a measurement of... meter, bars represent a periodic pulse in the music. In music employing The time signature (also known as meter signature) is a notational device used in Western musical notation to specify how many beats are in each bar and which note value (minim, crotchet, eighth note and so on) constitutes one beat. Two staves with time signature highlighted in blue Most time... mixed meters, barlines are instead used to indicate the beginning of rhythmic note groups, but this is subject to wide variation: some composers use dashed barlines, others (including Hugo Distler) have placed barlines at different places in the different parts to indicate varied groupings from part to part.

Quote: "The bar line is much, much more than a mere accent, and I don't believe that it can be simulated by an accent, at least not in my music." - Igor Fyodorovitch Stravinsky () (June 17, 1882 – April 6, 1971) was a composer of modern classical music. He wrote works in the neo-classical and serialist styles, but he is best known for two works from his earlier, Russian period: Le Sacre du printemps (The Rite of Spring) and L... Igor Stravinsky (DeLone et. al. (Eds.), 1975, chap. 3).

A hypermeasure, large-scale or high-level measure, or measure-group is a The International System of Units (symbol: SI) (for the French phrase Système International dUnités) is the most widely used system of units. It is used for everyday commerce in virtually every country of the world except the United States, Liberia and Myanmar, and it is almost globally... metric unit in which, generally, each regular measure is one beat (actually hyperbeat) of a larger meter. Thus a beat is to a measure as a measure/hyperbeat is to a hypermeasure. Hypermeasures must be larger than a notated bar, perceived as a unit, consist of a pattern of strong and weak beats, and along with adjacent hypermeasures, which must be of the same length, create a sense of hypermeter. The term was coined by Edward T. Cone. (Stein 2005, p.18-19, 329)

History

Barlines came into general use in the 1600s, when music began to be written in score format rather than individual parts. 16th-century usage was primarily restricted to The lute is a plucked string instrument with a fretted neck and a deep round back. It evolved from an instrument originally developed in the Middle East, which was also the ancestor of the superficially similar oud. The words lute and oud are both derived from Arabic al‘ud... lute and The vihuela is a Spanish Renaissance string instrument that appears to be a cross between a lute and a Renaissance guitar. It usually was tuned like a 6-course lute, fourth - fourth - major third - fourth - fourth, though the smaller versions sometimes were tuned so all the strings sounded notes of... vihuela music, but such barlines typically were not used to indicate a regular meter. (Source: Harvard Dictionary of Music)

See also

• Mensurstriche
• Wazn

References

• DeLone et. al. (Eds.) (1975). Aspects of Twentieth-Century Music. Englewood Cliffs, New Jersey: Prentice-Hall. ISBN 0130493465.
• Stein, Deborah (2005). Engaging Music: Essays in Music Analysis, Glossary. New York: Oxford University Press. ISBN 0195170105.