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==Origin==
[http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] intervalle, from Anglo-French & Latin; Anglo-French entreval, from [[Latin]] intervallum [[space]] between ramparts, interval, from inter- + vallum rampart
*[http://en.wikipedia.org/wiki/14th_century 14th Century]
==Definitions==
*1a : a [[space]] of [[time]] between [[events]] or states
*2a : a space between objects, [[units]], [[points]], or states
:b : difference in [[pitch]] between [[tones]]
*3: a set of [http://en.wikipedia.org/wiki/Real_numbers real numbers] between [[two]] numbers either including or excluding one or both of them
*4: one of a series of fast-[[paced]] [[exercises]] interspersed with slower ones or brief [[rests]] for [[training]] (as of an [[athlete]])
==Description==
In [http://en.wikipedia.org/wiki/Music_theory music theory], an '''interval''' is a combination of [[two]] [[notes]], or the [[ratio]] between their [[frequencies]]. Two-note combinations are also called [http://en.wikipedia.org/wiki/Dyad_(music) dyads]. Although [http://en.wikipedia.org/wiki/Chord_(music) chords] are often defined as sets of three or more notes, intervals are sometimes considered to be the simplest kind of chord.
Intervals may be [[described]] as:
:Vertical or harmonic, if the two notes sound [[simultaneously]]
:Horizontal, [[linear]], or melodic if they sound [[successively]].
In [http://en.wikipedia.org/wiki/Western_culture Western culture], the most common [[method]] to [[classify]] and name intervals is based on their [[quality]] (perfect, major, minor, etc.) and [[number]] (unison, second, third, etc.). For instance, two frequently used types of interval are called minor third and major third. Intervals may be also [[classified]] as:
:[http://en.wikipedia.org/wiki/Diatonic Diatonic] intervals, between the [[notes]] of a [http://en.wikipedia.org/wiki/Diatonic_scale diatonic scale], or
:[http://en.wikipedia.org/wiki/Chromatic Chromatic] intervals, non-diatonic intervals between the notes of a [http://en.wikipedia.org/wiki/Chromatic_scale chromatic scale].
Minute intervals ([http://en.wikipedia.org/wiki/Comma_(music) commas], and [http://en.wikipedia.org/wiki/Microtone microtones]) can be formed by the notes of musical scales containing more than 12 pitches (e.g., by the notes A♭ and G♯ found in some [http://en.wikipedia.org/wiki/Five-limit_tuning#Extension_of_the_twelve_tone_scale extended scales]), or by two notes having the same name, but tuned a different way (e.g., the [http://en.wikipedia.org/wiki/Syntonic_comma syntonic comma] is sometimes defined as the [[difference]] between an F♯ tuned using the D-based [http://en.wikipedia.org/wiki/Pythagorean_tuning Pythagorean system], and another F♯ tuned using the D-based [http://en.wikipedia.org/wiki/Quarter-comma_meantone quarter-comma meantone system]). They are sometimes so small that the [[difference]] in [[pitch]] between the two notes cannot be [[perceived]].[http://en.wikipedia.org/wiki/Interval_%28music%29]
[[Category: Music]]
[[Category: General Reference]]
==Origin==
[http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] intervalle, from Anglo-French & Latin; Anglo-French entreval, from [[Latin]] intervallum [[space]] between ramparts, interval, from inter- + vallum rampart
*[http://en.wikipedia.org/wiki/14th_century 14th Century]
==Definitions==
*1a : a [[space]] of [[time]] between [[events]] or states
*2a : a space between objects, [[units]], [[points]], or states
:b : difference in [[pitch]] between [[tones]]
*3: a set of [http://en.wikipedia.org/wiki/Real_numbers real numbers] between [[two]] numbers either including or excluding one or both of them
*4: one of a series of fast-[[paced]] [[exercises]] interspersed with slower ones or brief [[rests]] for [[training]] (as of an [[athlete]])
==Description==
In [http://en.wikipedia.org/wiki/Music_theory music theory], an '''interval''' is a combination of [[two]] [[notes]], or the [[ratio]] between their [[frequencies]]. Two-note combinations are also called [http://en.wikipedia.org/wiki/Dyad_(music) dyads]. Although [http://en.wikipedia.org/wiki/Chord_(music) chords] are often defined as sets of three or more notes, intervals are sometimes considered to be the simplest kind of chord.
Intervals may be [[described]] as:
:Vertical or harmonic, if the two notes sound [[simultaneously]]
:Horizontal, [[linear]], or melodic if they sound [[successively]].
In [http://en.wikipedia.org/wiki/Western_culture Western culture], the most common [[method]] to [[classify]] and name intervals is based on their [[quality]] (perfect, major, minor, etc.) and [[number]] (unison, second, third, etc.). For instance, two frequently used types of interval are called minor third and major third. Intervals may be also [[classified]] as:
:[http://en.wikipedia.org/wiki/Diatonic Diatonic] intervals, between the [[notes]] of a [http://en.wikipedia.org/wiki/Diatonic_scale diatonic scale], or
:[http://en.wikipedia.org/wiki/Chromatic Chromatic] intervals, non-diatonic intervals between the notes of a [http://en.wikipedia.org/wiki/Chromatic_scale chromatic scale].
Minute intervals ([http://en.wikipedia.org/wiki/Comma_(music) commas], and [http://en.wikipedia.org/wiki/Microtone microtones]) can be formed by the notes of musical scales containing more than 12 pitches (e.g., by the notes A♭ and G♯ found in some [http://en.wikipedia.org/wiki/Five-limit_tuning#Extension_of_the_twelve_tone_scale extended scales]), or by two notes having the same name, but tuned a different way (e.g., the [http://en.wikipedia.org/wiki/Syntonic_comma syntonic comma] is sometimes defined as the [[difference]] between an F♯ tuned using the D-based [http://en.wikipedia.org/wiki/Pythagorean_tuning Pythagorean system], and another F♯ tuned using the D-based [http://en.wikipedia.org/wiki/Quarter-comma_meantone quarter-comma meantone system]). They are sometimes so small that the [[difference]] in [[pitch]] between the two notes cannot be [[perceived]].[http://en.wikipedia.org/wiki/Interval_%28music%29]
[[Category: Music]]
[[Category: General Reference]]