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Longer Progressions
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One of the most important larger-scale harmonic relationships of a third - that between relative major and minor - is discussed in the key and modulation section of TonalityGUIDE. During the course of the nineteenth century, third relationships became an increasingly independent part of the harmonic language.
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In the common practice period, modulations by third to keys other than the relative major or minor tend to be a brief 'stop-over' on the way to a key a fifth away. In other words, if there is a modulation from I to iii, for example, the music tends to continue on to V. These sort of larger-scale patterns are beyond the scope of TonalityGUIDE, but the analytical methods introduced on its sister site - SchenkerGUIDE.com - offer a more sophisticated way of discussing the wider structure of tonal music.
information and orientation as you browse around TonalityGUIDE.com
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© Copyright Thomas Pankhurst
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