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Jazz Composition
Theory and Practice
Ted Pease
Chapter 1
Melodic Considerations
Interval Patterns
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CHAPTER 1
MELODIC CONSIDERATIONS
Interval Patterns
A thorough study of melody writing produces certain observations about how composers
connect notes together to form melodies. The scales listed above contain an almost
unlimited number of potential interval patterns, any of which can be used to create a
musical idea at any given moment. Nevertheless, the patterns that most composers use
most of the time can be described in general terms in order to help you get started.
First, some definitions:
Step:
Melodic movement up or down by a major or minor second (i.e. a whole step or a
half step).
Skip:
Melodic movement up or down by a major or minor third (i.e. “skipping” over a
scale note).
Leap:
Melodic movement up or down by a perfect fourth or more.
(Note: Some theory texts define a leap as any interval larger than a major second.)
Most scales are made up of combinations of whole and half steps (see above). Notice,
however, that the pentatonic scale contains two minor-third skips. Notice also that the
harmonic minor scale contains an augmented second interval between the sixth and
seventh step.
Chord arpeggios are made up of a combination of skips, with occasional steps or leaps
depending on the chord type and whether an arpeggio happens for more than one octave.
C7
E
D–7
F
7
E7sus4
3
11
JAZZ COMPOSITION THEORY AND PRACTICE
The following interval patterns are common in tonal and modal melody writing, not
only in jazz but in most other forms of popular music.
1.
Stepwise motion
is very common. It may be up or down. Stepwise motion
usually conforms to the scale of the moment. In some cases, two notes from the
scale of the moment may be connected by a chromatic approach.
G major scale
G
B7( 9)
3
E–7
D7( 9)
(Ch)
GMaj7
C7( 11)
2.
Skips
are common. They may be up or down. They are useful any time you wish
to spell a chord melodically. Arpeggiated chords form the basis of many bebop
melodies (“up the II, and down the V”).
E–7
A7( 9)
D–9
G7( 9)
CMaj9( 11)
F7( 9)
3.
Leaps
are used for dramatic purposes. The wider the leap the more dramatic
it is, and the greater the likelihood that it will be followed by a move in the
opposite direction.
F6
D–7
G–7
C7
A–7
D–7
G–7
C7( 9)
F6
E–7
A–7
D7
GMaj7
CMaj9
4.
Consecutive leaps
in the same direction should not exceed an octave. The same
goes for a leap and a skip in the same direction.
a.
Weak: combined leap
is a major ninth
b.
Weak: combined leap
is a major ninth
Better: combined leap
is only a perfect fifth
OR
Also better: combined
leap is a major sixth
Better: combined leap
is only a minor seventh
OR
Also better: combined
leap is a major seventh
12

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