Chromatic Chords - Flowchart
Chromatic Chords - Flowchart
Chromatic Chords - Flowchart
We are almost finished learning about everything that will typically pop up in a Classical-period piece.
Our final topic is chromatic chords - chords that use notes outside the key. They require extra accidentals
to make, and can thus confuse students into thinking that a piece has moved into a new key.
Not modulations
Modulations usually cadence in a new key or involves multple harmonies that only make sense in a new
key. Perceptually, they will change the sense of do to a new note.
- chromatic chords, on the other hand, are momentary detours within an otherwise normal progression.
These
They usually last for one chord only.
-
Secondary dominants, or borrowed chords.
The- most common chromatic chords you will encounter are secondary dominants, or, as one student of
mine called them, borrowed chords. A secondary dominants seems to serve as a temporary V, V&, viio,
or viio& chord that briefly points to some chord other than I. Heres an example written in C major:
secondary
dominant
C:
If you saw chords 2 and 3 out of context, youd probably think it was a Le going to a k in d minor.
2
Weve borrowed the dominant seventh from another key and slipped it into the progression.
Well call it Le of ii. Usually, the secondary dominant will continue to its target (in this case,
ii).
Le Le
kk
So, whenever you find a secondary chord and must identify it, ask what is it V (or viio) of?
If it is a secondary V or V&, count down a perfect fifth from its root - thats its target note. If
its a viio or viio&, count a half step up from its root.
Of course, in context it usually helps to just see what the chord leads to. V& of vi is usually
going to go to vi, et cetera. (The main exception is when secondary V&s form a chain, which
Ill show in a little bit.)
3
The dominant to tonic progression (say, V-I or viio-I) is the most powerful harmonic motion in classical
music. It has the ability to pull the ear along and point to a new target note.
Often people say that the target note is being tonicized, or made into a temporary tonic. I want to
avoid this sense of it, because I dont think we should confuse secondary dominants with modulation.
As far as Im concerned, if we hear a new do, weve modulated. Lets say that tonicization is a
weaker, less stable way to briefly emphasize a chord that is not I.
Substitutions
The simplest way to use secondary dominants is as a substitution for a normal chord in the flowchart.
In our first example progression, for example, the Le/ii stood in for a vi.
Le
Instead of an A minor triad, we use an A dominant seventh. Thus, we could imagine weve put the
secondary dominant in the flowchart where vi would normally be.
L& KL lkko
kk I
kk V&
Chromatic substitutions for the subdominants (ii and IV) are also common.
4
Insertions
Secondary dominants also can be inserted into progressions to make a little extra interest. The
progression would work without them, but their presence adds some cool chromatic motion.
C:
KL lkko
I
kk^ V&
L&
L
Because these chords are so good at pointing in new directions, theres often a sense that they
are diverting the progression away from where it would normally go.
C: K KL L lkko& lk KL L K
Here we arrive at V rather quickly, but a lkko of vi pulls us into deeper waters and keeps the
progression going.
5
Perhaps my favorite secondary dominant is the V& of IV, which is really a modified I chord. It
often has a dramatic wrenching effect, as one moment we are safe at home on the I chord and
the next we are pushing away from it.
C: K Le KL L K
Secondary V&s in a chain often feature one final twist in the laws of resolving seventh chords.
Both the third of the chord and the seventh sink down by half step in a series of parallel tritones.
sinking tritone
L& L&
C: K kk L L& K
6
C:
c:
7
in C:
^5 G
^4 F
ß^6 Aß
^5 G
The augmented sixth chord is not just these two notes, however. Theres always one or two more
pitches in the chord, and different variations are given somewhat silly geographical names.
Ger+^ in C V& in Aß
G
F Gß 7th
Eß Eß
l.t.
C C
Aß Aß
G
ba
ss
Eß
8
Augmented sixth chords usually appear with the ß^6 in the bass. Nobody really considers that the
root of the chord, though. (Usually, roots are stable, they are not tendency tones.)
The augmented sixth chords often appear in conjunction with other cool chromatic harmonies to
make smooth contrapuntal lines. Heres an example in c minor, which also includes a secondary
dominant (the V& of iv) as well as mode mixture (using a major IV instead of the usual iv.)
c:
Ger+^ Kw
Lt
kl
KL^ lkko
i
kko V&
9
Note the cool contrary motion this creates in the outer voices.
Mode Mixture
The majorness or minorness of a scale can be referred to as its mode. (Mode can also refer to more
exotic scales such as phrygian or mixolydian.)
Mode mixture is simply the practice of mixing in diatonic triads from a different mode (drawing
on, say, the chords of C minor when one is in C major.) Observe these progressions in C major and
find the mode mixtures.