MOS scale: Difference between revisions

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{{interwiki|en=MOS scale|de=MOS-Skala|es=|ja=MOSスケール|ro=G2S}}{{Beginner|Mathematics of MOS}}An '''MOS''' ~~(sometimes~~ '''mos'''~~; originally~~ pronounced "em-oh-ess," ~~but sometimes also~~ pronounced ~~"moss"; plural~~ ''~~'MOSes'~~'' or ~~'''mosses''') or '''~~moment of symmetry~~'''~~ is a [[periodic scale]] where every number of steps (except those spanning multiples of the period) spans intervals of two specific sizes. MOSses therefore have two step sizes; we can denote step patterns of mosses by writing L for each large step and s for each small step.

{{interwiki

| en = MOS scale

| de = MOS-Skala

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| ja = MOSスケール

| ro = G2S

}}{{Beginner|Mathematics of MOS}}

A '''moment of symmetry''' ('''MOS''' or '''mos'''<ref group="note">The acronym "MOS" is generally pronounced ''em-oh-ess'', while the {{w|anacronym}} "mos", more common in informal and experimental settings, is generally pronounced ''moss''. Sometimes "MOSS" or "moss", standing for "moment of symmetry scale", are used instead, although there is no significant difference in meaning.</ref>) is a [[periodic scale]] where every number of steps (except those spanning multiples of the period) spans intervals of two specific sizes. MOSses therefore have two step sizes; we can denote step patterns of mosses by writing L for each large step and s for each small step.

The [[5L 2s|diatonic scale]] is a classic example of an MOS scale. It has 7 steps: 5 large ones (whole tones) and 2 small ones (diatonic semitones). Writing out the pattern of the major mode, we get LLsLLLs. The other modes are rotations of this pattern (e.g. LsLLsLL is the minor mode.) The melodic minor scale, which is not a mode of the diatonic scale, (LsLLLLs) is not a MOS since it has three kinds of fifths: perfect, diminished, and augmented; and so four steps spans intervals of three specific sizes.

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-{{interwiki|en=MOS scale|de=MOS-Skala|es=|ja=MOSスケール|ro=G2S}}{{Beginner|Mathematics of MOS}}An '''MOS''' (sometimes '''mos'''; originally pronounced "em-oh-ess," but sometimes also pronounced "moss"; plural '''MOSes''' or '''mosses''') or '''moment of symmetry''' is a [[periodic scale]] where every number of steps (except those spanning multiples of the period) spans intervals of two specific sizes. MOSses therefore have two step sizes; we can denote step patterns of mosses by writing L for each large step and s for each small step.
+{{interwiki
+| en = MOS scale
+| de = MOS-Skala
+| es =
+| ja = MOSスケール
+| ro = G2S
+}}{{Beginner|Mathematics of MOS}}
+A '''moment of symmetry''' ('''MOS''' or '''mos'''<ref group="note">The acronym "MOS" is generally pronounced ''em-oh-ess'', while the {{w|anacronym}} "mos", more common in informal and experimental settings, is generally pronounced  ''moss''. Sometimes "MOSS" or "moss", standing for "moment of symmetry scale", are used instead, although there is no significant difference in meaning.</ref>) is a [[periodic scale]] where every number of steps (except those spanning multiples of the period) spans intervals of two specific sizes. MOSses therefore have two step sizes; we can denote step patterns of mosses by writing L for each large step and s for each small step.
 The [[5L 2s|diatonic scale]] is a classic example of an MOS scale. It has 7 steps: 5 large ones (whole tones) and 2 small ones (diatonic semitones). Writing out the pattern of the major mode, we get LLsLLLs. The other modes are rotations of this pattern (e.g. LsLLsLL is the minor mode.) The melodic minor scale, which is not a mode of the diatonic scale, (LsLLLLs) is not a MOS since it has three kinds of fifths: perfect, diminished, and augmented; and so four steps spans intervals of three specific sizes.