The sequence of seconds and thirds is a descending sequence. Here in its most elementary form:

This sequence is a variant of the sequence of fourths and fifths. The fourth interval is transformed into a second by replacing the first chord with another chord a third higher. The ascending second pattern is repeated transposing descending seconds:

Using seventh chords

Using inversions


Modulating sequence


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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. José Rodríguez Alvira.
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