Chroma: Difference between revisions

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:''~~This article~~ is ~~about~~ the ~~chroma~~ in ~~general~~. ~~For that~~ in the diatonic scale~~, see~~ [[~~Chromatic~~ semitone]].''

{{About|chromas in general|the chroma in the diatonic scale|Chromatic semitone}}

__NOTOC__

The '''chroma''' (precisely the '''moschroma''') of a [[mos scale]] is the interval that is the difference between the large step and the small step in the scale. In particular, the chroma in the [[diatonic]] scale is the [[chromatic semitone]], or augmented unison, such as the interval of C–C♯.

The '''chroma''' (precisely the '''moschroma''') of a [[mos scale]] is the interval that is the difference between the large step and the small step in the scale. In particular, the chroma in the [[diatonic]] scale is the [[chromatic semitone]], or augmented unison, for example, the interval of C-C#.

In staff notation, alteration by the chroma can be represented by the sharp (♯) or flat (♭), as is shown above. In [[diamond-mos notation]], it should be noted that they are reserved exclusively for the diatonic scale, whereas am (&) and at (@) are used for other mos scales.

In staff notation, alteration by the chroma can be represented by the sharp (#) or flat (b), as is shown above. In [[diamond-mos notation]], it should be noted that they are reserved exclusively for the diatonic scale, whereas am (&) and at (@) are used for other mos scales.

Moving one note in a mos scale by a chroma leads to a [[modmos scale]] if the result is not just a transposition of the original mos scale.

The [[Fokker block]], being a generalization of the mos scale to higher ranks, also has the concept of chroma. See [[Fokker block]].

== History ==

The first mention of the term "chroma" occurs in Marchettus of Padua<ref>Marchettus of Padua (1318) ''Lucidarium''.</ref> where he describes it as an interval smaller than the diatonic semitone. The exact nature of the interval he was describing is debated.<ref>Joe Monzo (2008) ''Speculations on Marchetto of Padua's "Fifth-Tones"''. http://www.tonalsoft.com/monzo/marchetto/marchetto.aspx</ref>

== In psychoacoustics ==

In psychoacoustics, the term ''chroma'' refers to the circular perception of pitch with respect to [[octave equivalence]].

This is essentially the same as the concept of [[pitch class]].

== See also ==

* [[Pythagorean chroma]]

* [[Chromatic semitone]]

* [[25/24]], the 5-limit chromatic semitone

* [[Sharpness]], a property related to sharps and flats in [[edo]]s

* [[Diesis (scale theory)]]

== References ==

[[Category:Chroma| ]]

@@ Line 1: / Line 1: @@
-:''This article is about the chroma in general. For that in the diatonic scale, see [[Chromatic semitone]].''
+{{About|chromas in general|the chroma in the diatonic scale|Chromatic semitone}}
+__NOTOC__ <!-- No TOC because it's a rather short article. Remove this if it has expanded significantly. -->
+The '''chroma''' (precisely the '''moschroma''') of a [[mos scale]] is the interval that is the difference between the large step and the small step in the scale. In particular, the chroma in the [[diatonic]] scale is the [[chromatic semitone]], or augmented unison, such as the interval of C&ndash;C♯.
-The '''chroma''' (precisely the '''moschroma''') of a [[mos scale]] is the interval that is the difference between the large step and the small step in the scale. In particular, the chroma in the [[diatonic]] scale is the [[chromatic semitone]], or augmented unison, for example, the interval of C-C#.
+In staff notation, alteration by the chroma can be represented by the sharp (♯) or flat (♭), as is shown above. In [[diamond-mos notation]], it should be noted that they are reserved exclusively for the diatonic scale, whereas am (&) and at (@) are used for other mos scales.
-In staff notation, alteration by the chroma can be represented by the sharp (#) or flat (b), as is shown above. In [[diamond-mos notation]], it should be noted that they are reserved exclusively for the diatonic scale, whereas am (&) and at (@) are used for other mos scales.
 Moving one note in a mos scale by a chroma leads to a [[modmos scale]] if the result is not just a transposition of the original mos scale.
 The [[Fokker block]], being a generalization of the mos scale to higher ranks, also has the concept of chroma. See [[Fokker block]].
+== History ==
+The first mention of the term "chroma" occurs in Marchettus of Padua<ref>Marchettus of Padua (1318) ''Lucidarium''.</ref> where he describes it as an interval smaller than the diatonic semitone. The exact nature of the interval he was describing is debated.<ref>Joe Monzo (2008) ''Speculations on Marchetto of Padua's "Fifth-Tones"''. http://www.tonalsoft.com/monzo/marchetto/marchetto.aspx</ref>
+== In psychoacoustics ==
+{{wikipedia|Chroma feature}}
+In psychoacoustics, the term ''chroma'' refers to the circular perception of pitch with respect to [[octave equivalence]].
+This is essentially the same as the concept of [[pitch class]].
 == See also ==
+* [[Pythagorean chroma]]
+* [[Chromatic semitone]]
+* [[25/24]], the 5-limit chromatic semitone
 * [[Sharpness]], a property related to sharps and flats in [[edo]]s
+* [[Diesis (scale theory)]]
+== References ==
+<references/>
 [[Category:Chroma| ]] <!-- main article -->