Diatonic Triads and 7 th Chords Diatonic Chords Diatonic Chords that belong to a specific keyscale AlteredChromatic Chords chords using notes that are not part of a specific key Minor Scale Issues ID: 592605
Download Presentation The PPT/PDF document "AP Theory" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
AP Theory
Diatonic Triads and 7
th
Chords Slide2
Diatonic Chords
Diatonic – Chords that belong to a specific key/scale
Altered/Chromatic Chords – chords using notes that are not part of a specific keySlide3
Minor Scale Issues
The problem is the use of the raised 6 and 7 degrees according to where the line leads.
There are many occasions where the melodic minor is used with the raised 6 and 7 leading upward by step and the lowered 6 and 7 leading downward by step
Most of the underlying harmonies in minor conform to the harmonic minor scale (raised 7
th
degree)Slide4
Triads in Major
Triads may be constructed using any degree of the major scale as the root
These chords are named by the degree used as the root I, ii, iii, IV, V, vi, vii
The triad type is indicated by the form of the Roman Numeral – uppercase, lowercase
Diatonic Triads types in Major
Major – I, IV, V
Minor – ii, iii, vi
Diminished – vii
Augmented – noneSlide5
Triads in Minor
Because 6 and 7 are variable in minor, construction of these chords are more involved.
Nonetheless there are 7 triads in minor that occur more frequently than the others – all belonging to the harmonic minor scale except the 5
th
of the III chord
Diatonic Triad typed in minor
Major – III, V, VI
Minor – I, iv
Diminished – ii
, vii*
Augmented – none Slide6
Seventh Chords in Major
Seventh chord types
Major seventh – uppercase roman numeral with a M7
Major-minor seventh – uppercase roman numeral with a 7
Minor seventh – lowercase with a 7
Half-diminished – lowercase roman numeral with a 7
Diminished – lowercase roman numeral with a
7Slide7
Diatonic Seventh Chords in Major
M7 - I M7 and IV M7
Mm7 - V7
m
7
- ii7, iii7, vi7 7 - vii 7
7 - none Slide8
Seventh Chords in Minor
Because of the variable 6 and 7 degree there are 16 possible diatonic chords in minor
The most commonly used seventh chords on each scale degree belong to the Harmonic minor scale
Common Diatonic seventh chords in Minor
M7
-
III M7, VI M7
Mm7
-
V7
M7
-
i7 and iv7
7 ii 7
7 vii
7Slide9
Triads in Major and MinorSlide10
Diatonic Seventh Chords