Up until now, throughout the chord progressions section, we've been
looking at major key chord relationships in
relation to a major
tonic chord (I).
Now let's see how we can use this very same scale to build minor key
relationships, which require a new tonic, a minor tonal centre...
The minor tonic chord
The submediant(vi)
in the chord scale acts both as a function within major key
progressions and
as the relative tonic
of minor key progressions.
The vi chord therefore becomes i
(lower case numeral for minor chords), but the interval relationship
between each chord in the scale remains intact from that point. So if
vi
becomes i, then the next chord, vii, will become ii, and so on.
This is the new scale we can build based on that new minor tonic...
Major Key
vi
vii
I
ii
iii
IV
V
Minor Key
i
ii
III
iv
v
VI
VII
So all we've done is reposition the scale in relation to the 6 chord
becoming 1. The intervals of the scale continue from that point.
This means the old major tonic chord has now become the III (mediant)
chord of the minor scale.
However, they still keep their names based on their position relative to the tonic
with the exception of the 7th degree, which is called the leading tone
chord in a major key, and the subtonic in the minor key.
i
ii
III
iv
v
VI
VII
Tonic
Supertonic
Mediant
Subdominant
Dominant
Submediant
Subtonic
If we were to play through that scale, from a tonic of A minor, here's
what we'd get...
What this also means is that the
chord variations we learned for the major key chords (e.g. turning
major into minor, extending chords etc.) will also apply for minor key
positions.
For example, we learned that the V chord of a major
key is naturally a dominant 7th chord. This also applies when it
becomes the VII chord in a minor key.
The only difference is we've changed the position of the tonic, which
puts these chord relationships into a different context.
Relative
minor key
If
you look at the relationship between the new minor tonic and the III
chord of its scale, we can see that this was the same as the I - vi
relationship in the major key scale.
The interval between these two chords are known as relative major/minor.
Understanding
this key relationship will allow you to execute what are known as
"relative key changes", allowing you to switch into the minor/major key
scale in the same song.
This relative interval is always 3
semitones apart, which is the equivalent of 3 frets on the
fretboard. You should already know this from learning the interval
between the I and vi chords from previous lessons...
And this relationship also applies to A and D string chord root notes.
So
if you're building a progression around a major tonic (I), try
resolving to the vi of that progression and you have the option to
continue the song in a more downbeat minor key.
An example would be...
I
ii
IV
i (VI)
Cmaj
Dm
Fmaj
Am
Similarly, if
you're building a progression around a minor tonic (i), try resolving
to the III of that progression and you have the option to continue the
song in a more upbeat major key!
So the vi chord of the major key can become the relative minor tonic
of the new minor key progression.
Of course, you can then resolve back into the relative major key any
time you want.
This is all about keeping your options open. More on using relative key
changes effectively in a later lesson.
Building
basic minor key progressions
As with the major key examples I showed you throughout this course,
this scale is by no means the limits of our minor key songwriting,
rather it's
the
foundation
for more complex minor key progressions we'll build in
future lessons.
Let's use that minor chord scale to build some
simple minor key chord progressions. Remember, a large part of playing
chord progressions is knowing the many different chord forms you can
play. This is covered in the chords section. The chords I show
you below are just typical barre chord or open position examples...
VI - F
major
VII - G
major
i - A minor
v - E minor
i -
B minor
Fret
2
v -
F# minor
Fret 2
iv - E
minor
i -
G minor
Fret 3
III -
Bb major
Fret
6
v - D minor
Fret 5
VII - F
major
As mentioned before, the variations/substitutions you can apply to
these chord
positions works in exactly the same way as it did with the major key
scale. For example, as the major key iii chord has now become the minor
key v chord, we can apply the same variations to this v chord as we did
the iii. One variation is to turn it into a major chord (v - V).
More on minor key variation in the coming lessons.
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