h3 wk10 part 1
TRANSCRIPT
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Harmony 3Diminished 7th Chords.
• Diminished chord patterns.
Harmony 3 text pp.38-42
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A diminished 7th chord is a succession
of minor thirds.
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m3
m3
m3
A diminished seventh chord contains 3 minor thirds.
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There are 3 diminished 7th
chords.
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The first diminished seventh chord starts here and ascends through 3
minor third intervals.
m3
m3
m3
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The first diminished seventh chord starts here and ascends through 3
minor third intervals.
m3
m3
m3
The fourth minor third interval brings us back to where we started.
m3
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The next possible diminished seventh chord starts here and ascends through
3 minor third intervals.
m3
m3
m3
The fourth minor third interval brings us back to where we started
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The final diminished seventh chord starts here and ascends through 3
minor third intervals.
m3
m3
m3
The fourth minor third interval will bring us back to where we started
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If we were to build a fourth diminished seventh chord starting here we would
arrive at the same set of chord tones as in the first diminished seventh chord.
m3
m3
m3
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These are the three possible diminished seventh chords.
Every other diminished seventh chord is an inversion of one of the above.
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Diminished 7th chords are unstable.They each contain 2 tritones.
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tritonetritone
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tritone – 6 frets
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tritone – 6 fretstritone – 6 frets
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Diminished 7th chords in major keys are
most often found as linking chords
between neighbouring diatonic
chords, or as approach chords to
diatonic chords.
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We shall begin by examining
the most common
patterns for diminished
seventh chords.
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Look at and listen to example 1 on p.38 of
your H3 text.
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Open your Real Book and check out
Desafinado on p.65.
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Look at and listen to example 2 on p.38 of
your H3 text.
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Open your Real Book and check out I Love
Lucy on p.142.
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Look at and listen to example 3 on p.38
of your H3 text.
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Look at and listen to example 1 on p.39
of your H3 text.
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Open your Real Book and check out
All Of Me on p.3.
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Look at and listen to example 2 on p.39
of your H3 text.
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Open your Real Book and check out Here’s That Rainy
Day on p.138.
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Open your Real Book and check out Everything Happens
To Me on p.91.
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Look at and listen to example 3 on p.39
of your H3 text.
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Io7 as an auxiliary diminished.
Look at and listen to example 4 on p.39
of your H3 text.
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Vo7 as an auxiliary diminished.
Look at and listen to example 1 on p.40
of your H3 text.
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• The diminished seventh chords that we have looked at/listened to are the “common” diminished sevenths.
• The unusual diminished seventh chords are left for you (the enterprising student) to find.
• The following listening examples contain some of the unusual diminished seventh chords.
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Check out the summary at the bottom of p.40 in
your H3 text.
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50Ascending diminished seventh chords
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The ascending diminished seventh chords are derived from the secondary dominants of their target chords and have smooth voice leading characteristics.
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V7(b9)/II is targeting IIm7.
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Spell V7(b9)/II.
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The upper structure is C#o7.
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The upper structure is C#o7.
V7(b9)/II
#Io7
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The same procedure can be applied to all the
ascending diminished seventh
chords.
You should study examples 1 and 2
on p.41 and examples 1 and 2 on p.42 of your H3
text.