Music Composition 1 by Jonathan Peters

Author:Jonathan Peters [Peters, Jonathan]
Language: eng
Format: epub, pdf
Published: 2014-02-04T02:00:00+00:00

(Lesson 11 - Audio 06)

A diatonic sequence simply means that each time the motif is restated it remains in the same key ( it uses only pitches from that particular key/scale). Because of this there will usually be slight differences in the proportional distance between pitches. For example, if you look at the pattern of half steps and whole steps in the first measure above you will find that the movement of pitches is: “whole, whole, half, whole”. If you look at the pattern of half steps and whole steps in the second measure you will find that the movement of pitches is: “half, half, whole, whole”. In order to keep the distance between the pitches exactly the same from one statement of the motif to the next we would need to sharp or flat certain notes in the second and third measures. If we did this we would be using pitches that are not found in the key and thus the sequence would be called chromatic rather than diatonic. (Remember: diatonic refers to the major and minor scales.) Here is an example of a chromatic sequence.

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