A duration is an amount of time or a particular time interval. Quantity is a kind of property which exists as magnitude or multitude For other uses see Time (disambiguation Time is a component of a measuring system used to sequence events to compare the durations of With regards to Time, an interval or period is the Duration between two events or occurrences of similar events For example, an event in the common sense has a duration greater than zero (but not very long), but in certain specialized senses (such as in the theory of relativity), a duration of zero. SpaceTime is a patent-pending three dimensional graphical user interface that allows end users to search their content such as Google Google Images Yahoo! YouTube eBay Amazon and RSS It is often cited as one of the fundamental aspects of music, see also rhythm. Music is an Art form in which the medium is Sound organized in Time. Rhythm (from Greek ῥυθμός - rhythmos, "any measured flow or movement symmetry" is the variation of the length and accentuation of

Durations, and their beginnings and endings, may be described as long, short, or taking a specific amount of time. Often duration is described according to terms borrowed from descriptions of pitch. Pitch represents the perceived Fundamental frequency of a sound As such, the duration complement is the amount of different durations used, the duration scale is an ordering (scale) of those durations from shortest to longest, the duration range is the difference in length between the shortest and longest, and the duration hierarchy is an ordering of those durations based on frequency of use (DeLone et al. In traditional Music theory a complement is the interval which when added to the original interval spans an Octave in total The concept of scale is applicable if a system is represented proportionally by another system In Music, the range of a Musical instrument is the distance from the lowest to the highest pitch it can play @@@ main@@@ - title Hierarchy@@@ keywords structure; sociology; information@@@ review@@@ - (Eds. ), 1975, chap. 3).

Durational patterns are the foreground details projected against a background metric structure, which includes meter, tempo, and all rhythmic aspects which produce temporal regularity or structure. Meter or metre is a concept related to an underlying division of time characteristic of western music Meter or metre is a concept related to an underlying division of time characteristic of western music 2266-Tetramethylpiperidine-1-oxyl or TEMPO is the Chemical compound with the formula (CH23(CMe22NO Duration patterns may be divided into rhythmic units and rhythmic gestures. A rhythmic unit is a Durational pattern which occupies a period of time equivalent to a pulse or pulses on an underlying Metric level, as opposed to a A rhythmic gesture is a Durational pattern which in contrast to a Rhythmic unit, does not occupy a period of time equivalent to a pulse or pulses on an (DeLone et al. (Eds. ), 1975, chap. 3) However, they may also be described using terms borrowed from the metrical feet of poetry: iamb (weak-strong), anapest (weak-weak-strong), trochee (strong-weak), dactyl (strong-weak-weak), and amphibrach (weak-strong-weak), which may overlap to explain ambigouity (Cooper and Meyer, 1960). In verse, many meters use a foot as the basic unit in their description of the underlying rhythm of a poem An iamb or iambus is a Metrical foot used in various types of Poetry. An anapaest or anapest, also called antidactylus, is a Metrical foot used in formal Poetry. A trochee or choree, choreus, is a Metrical foot used in formal Poetry. A dactyl (Gr δάκτυλος dáktulos, “finger” is a type of meter in poetry. An amphibrach is a Metrical foot used in Latin and Greek Prosody.

See also

• Time scale (music). In Music, a time scale is specification of divisions ( scale) of Time or Rhythm.

References

• Cooper and Meyer (1960). The Rhythmic Structure of Music. University of Chicago Press. ISBN 0-226-11522-4. Cited in Delone directly below.
• DeLone et al. (Eds. ) (1975). Aspects of Twentieth-Century Music. Englewood Cliffs, New Jersey: Prentice-Hall. ISBN 0-13-049346-5.