Flashcards in Music Theory 1 (Chord Theory) Deck (11):
What notes make up a major triad?
Root, major third, perfect fifth.
1 3 5
Major triad formula: Major third + minor third
C (M3) E (m3) G
What notes make up a minor triad?
Root, minor 3rd, perfect 5th.
1 b3 5
Minor triad formula: minor 3rd + Major third
A (m3) C (M3) E
D (m3) F (M3) A
E (m3) G (M3) B
What notes make up a diminished triad?
Root, minor 3rd, diminished 5th.
1 b3 b5
Diminished triad formula: minor 3rd + minor third.
B (m3) D (m3) F
What notes make up an augmented triad?
Root, major 3rd, augmented 5th.
1 3 #5
Augmented triad formula: major 3rd + major 3rd
C (M3) E (M3) G#
This triad is not derived from the diatonic (major) scale. Almost like a musical question mark.
Used to create a suspended or mysterious sound.
What diatonic chords are formed when harmonising the major scale?
I - Major
ii - minor
iii - minor
IV - Major
V - Major
vi - minor
vii - diminished
What are the five main types of seventh chords?
. Major 7th
2. Minor 7th
3. Dominant 7th
4. Half-Diminished 7th
5. Diminished 7th
How is a major 7th chord constructed?
Root, major 3rd, perfect 5th, major 7th
1 3 5 7
Formula: major 3rd, minor 3rd, major 3rd
C (M3) E (m3) G (M3) B
Sounds very pretty and rich. Frequently heard in jazz and RnB styles.
Sounds like it has more tension/dissonance due to that semitone interval between the leading note and the tonic.
How is a minor 7th chord constructed?
Root, minor 3rd, perfect 5th, minor 7th
1 b3 5 b7
Formula: minor 3rd, major 3rd, minor 3rd
C (m3) Eb (M3) G (m3) Bb
The greater distance between leading note and the tonic (a tone) creates more space, compared to the major 7th's semitone gap.
How is a dominant 7th chord constructed?
Root, major 3rd, perfect 5th, minor 7th
1 3 5 b7
Formula: major 3rd, minor 3rd, minor 3rd
C (M3) E (m3) G (m3) Bb
Sounds like it wants to resolve to the tonic chord. It sounds like an inbetween major and minor sound.
They strongly establish a sense of resolution back to the tonic chord. This is because the notes of the dominant 7th strongly resolve to the tonic:
the first note of the V7 is the highest note of the tonic triad,
The 3rd note of the V7 is a semitone below the tonic,
the b7 of the V7 is a semitone above the 3rd of the tonic.
I - C E G
V7 - G B(semitone below) D F(semitone above)
I - C E G
How is a half-diminished 7th chord constructed? (i.e. Minor 7th Flat 5)
Also knows as the Minor 7th Flat 5. (common in jazz)
Called half-diminished as it has a flattened 7th as opposed to the double flatted 7th of the fully diminished chord.
This uses the diminished triad as its base.
Root, minor 3rd, diminished 5th, minor 7th
1 b3 b5 b7
Formula: minor 3rd, minor 3rd, major 3rd
C (m3) Eb (m3) Gb (M3) Bb