Quartertone: Difference between revisions
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{{Wikipedia|Quarter tone}} | |||
A '''quartertone''' or '''quarter tone''' is an [[interval]] which is similar in size to a single step of [[24edo]], which is 50 [[cents]]. This makes "quartertone" an [[interval region]], similar to "seventh" or "major third". | A '''quartertone''' or '''quarter tone''' is an [[interval]] which is similar in size to a single step of [[24edo]], which is 50 [[cents]]. This makes "quartertone" an [[interval region]], similar to "seventh" or "major third". | ||
== Properties == | == Properties == | ||
In harmony, quarter tones tend to be perceived as [[dissonant]]. As such, the [[harmonic entropy]] model is generally tuned to portray them as having the highest harmonic entropy of any interval. In melody, they tend to produce a "bending" or "melting" effect. Due to this effect, they are often used as grace notes to smoothen and add color to the transition between more distant intervals. | |||
In the classical and folk traditions of [[Arabic, Turkish, Persian|Arabia]], [[Indian|North India]], [[Indian|South India]], [[Arabic, Turkish, Persian|Iran]] and [[Arabic, Turkish, Persian|Turkey]], quartertones are not used as melodic intervals in their own right, but they are used as critical building blocks of larger melodic units. They are particularly used to build [[neutral]] intervals such as neutral seconds and neutral thirds (it should be noted that each of these traditions has multiple flavors of major, minor and neutral seconds, thirds, etc.) | In the classical and folk traditions of [[Arabic, Turkish, Persian|Arabia]], [[Indian|North India]], [[Indian|South India]], [[Arabic, Turkish, Persian|Iran]] and [[Arabic, Turkish, Persian|Turkey]], quartertones are not used as melodic intervals in their own right, but they are used as critical building blocks of larger melodic units. They are particularly used to build [[neutral]] intervals such as neutral seconds and neutral thirds (it should be noted that each of these traditions has multiple flavors of major, minor and neutral seconds, thirds, etc.) | ||
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The [[EDO]]s: {{EDOs|21, 22, 23, 24, 25, 26, 27, 28 & 29}} use a quartertone as their smallest step size. EDOs slightly larger or smaller are sometimes argued to do the same. This makes quartertones structurally important to those EDOs. They may sometimes also be used as melodic intervals depending on the approach taken. | The [[EDO]]s: {{EDOs|21, 22, 23, 24, 25, 26, 27, 28 & 29}} use a quartertone as their smallest step size. EDOs slightly larger or smaller are sometimes argued to do the same. This makes quartertones structurally important to those EDOs. They may sometimes also be used as melodic intervals depending on the approach taken. | ||
A sampling of just intervals that sit towards the middle of the quartertone range: [[36/35]], [[100/97]], [[33/32]]. | 24edo is sometimes called "'''the quartertone scale'''" or "'''the quarter tone scale'''". | ||
A sampling of just intervals that sit towards the middle of the quartertone range: [[36/35]], [[35/34]], [[34/33]], [[100/97]], [[33/32]]. | |||
A sampling of just intervals that sit towards the outskirts of the quartertone range: [[50/49]], [[49/48]], [[45/44]], [[128/125]], [[28/27]], [[27/26]], [[25/24]], [[23/22]]. | A sampling of just intervals that sit towards the outskirts of the quartertone range: [[50/49]], [[49/48]], [[45/44]], [[128/125]], [[28/27]], [[27/26]], [[25/24]], [[23/22]]. | ||
[[Category:Interval | [[Category:Interval regions]] | ||
[[Category:Quartertone]] | |||