Chord Substitution

This next lesson is about finding a chord substitution for the three basic triads of the most important (I,IV,V)scale degrees. We'll discuss each of the other scale degrees in the diatonic scales in order to understand how to substitute them or add them to the three main degrees of the scale.

This Piano continues the previous lessons of chord theory and three chords and the truth. Click here to go to chord theory if you haven't followed this lesson yet).

Afterward you better start with the three main scale degrees before we continue with this lesson. Click here to learn about the three triads of the three main scale degrees.

Here are the chords progressions we're gonna cover in this lesson. Click on a specific chord progressions if you wnat to see how we perform a chord substitution in it.

Chord Progression with Supertonic	Chord Progression with Submediant	Chord Progressions with Mediant	Chord Progressions with Leading Tone
II-V7-I	I-VI-IV-V7	I-III-IV-V7	II-VII-I
I-IV-II-V7	I-VI-II-V7	III-VI-II-V7
I-VI-IV-II-V7-I	I-V-VI-IV

Until now we've learned that every major and minor scale has seven special triads, called diatonic triads which are formed on the scale degrees.

After we've learned to find all the diatonic triads of the major scales and minor scales we talked about the three main chords and their functions. The I (tonic) IV (subdominant) and V7 (dominant).

The Supertonic (II Scale Degree)

The second scale degree of each scale is called "supertonic". Super is Latin for "Above".
If we add the third and the fifth note of the second chord degree we get a minor chord. If we take C major for example we get the D minor chord.

In order to understand the function of D minor let's look at this picture.

If you look closely you'll notice that D minor and F share two identical notes. These two chords are almost the same. That gives us a clue of the function of the second degree chord in the scale. It's a sort of replacement for the subdominant; Bottom line, Dm (the super tonice) is a great chord substitution for F (the subdominant)

If we already explored the chord progression of IV-V7-I I can now tell you that II-V7-I could be his almost identical brother. These two chord progression create almost the same impact. In pop music and jazz the II-V7-I is very common. Lots of standards (famous songs everyone likes to use for improvising with) are based on this chord progression including a drop of a fifth from the second degree and back home.

Examples of songs with II-V7-I

A place in the sun
Blue moon
Satin Doll
This year's kisses
Tune Up
What is this thing called love?
Night and day

Here's a piano chord chart of the II-V-I chord progression in all major scales.

Now we can take this chord progression a step further. We can start with the first degree go to the subdominant, make a chord substitution with the second degree (also functions as a subdominant) that would lead us to dominant and go back to the first degree.

Run Around by the Blues Traveler could be a good song to practice this chord progression with.

The Sub-Mediant

If we built a triad upon the sub-mediant which is the sixth note of the scale by adding its third and fifth note we get the A minor chord.

If we have a look we'll realize that A minor has two identical notes with C major (the tonic) and two identical notes with F major (the subdominant). So basically we coud use the submediant chord to make a chord substitution with the tonic or the subdominant in a natural way. Because of the similarity not much is happening.

Note that A minor is also the parallel minor scale of C major.

The sixth triad opens a few possibilities for some nice chord substitutions.
The first is I-VI-IV-V.
If we take C major as an example we get this chord progression:

Here's a piano chord progression of all I-VI-IV-V in inversions.

By the way, we could even take this chord progression an extra step further by adding a a chord substitution for the IV degree the second degree.

I-VI-IV-II-V7-I or in C major C-Am-F-Dm-G7-C.

This chord progression is very pleasant to the ear since it's consequently moving down in thirds which is clear to the listener.

Turn around

The turn around chord progression is so common in many songs. Many songs have a turn around in their body and other songs end with a turn around because as its name suggests, this chord progression is turning the song back to the beginning in a very natural way.

Here are the scale degrees of the turn around. I-VI-II-V7 or if we take C major we get C-Am-Dm-G7.

Now we will move to the dominant (G major) to fulfill the tension solving back to the tonic again.

Here's a piano chord chart of the turn around in all major scales.

Here are some songs that contain a turn around:

In the Still of the Night
26 Miles (Santa Catalina)
That Boy
Sherry Baby
Dream (All I Have to Do)
I'e got rhythm
Crocodile Rock
If I Had a Hammer
Blue Moon
Mister Sandman
Across The Universe
Lovely Rita
You're Going To Lose That Girl
Hungry Heart
Honey Pie
Ragtime Mama Blues
Alice's Restaurant
Daydream

By the way I-VI-IV-V-I is also a sort of turn around since the II degree and the IV has the same impact of suspending the dominant.

There are many famous songs who have this chord progression in their body. A good example is "No Woman No Cry" of Bob Marley and "Let It Be by the Beatles." Click here for the One Love piano tutorial.

The Mediant

The mediant is the third scale degree of the major chord. It is located between the tonic and the dominant and that's why it is named "middle" in Latin. The triad which is based upon this scale degree by adding the third and the fifth note is E minor.

Here's a piano chord chart of I-III-IV-V7 in all major scales.

This example is quite similar to I-VI-IV-V only instead of going down harmonically we go up. There's a chord substitution from the first degree to the third degree with only one note changing (in C major C major the C is changing to B).
Then we go to the fourth degree which leads us to the fifth closing this chord progression to the first degree.

You Know My Name (Look Up The Number) by the Beatles is a good example for a song that conatains the chord progression.

Another nice thing to do is to replace the I degree with the third in the turn around.
So you start with a classic chord progression of I-VI-II-V and then instead of going to another turn starting with the first degree you play a turn around with the third degree. III-VI-II-V7

What you're seeing here is the beginning of a famous chord progression called Rhythm changes. We're gonna discuss this later in detail.

Such example demonstrates well the III degree as a replacement of the I degree.

The Seventh Degree Triad

Let's have a look at the seventh degree triad. If we take C major again for example B would be our seventh note, also called the leading tone. If we add a third and a fifth to it we get a Bo, a diminished chord.

Now let's compare it with the dominant. Notice the Bo and that G7 has all the notes of Bo. Do you see where I'm getting at?
The triad of the seventh degree serves as a dominant just like the fifth degree (The dominant).We can make a perfect chord substitution between G7 and Bo

If we used the II-V7-I chord progress we could replace the fifth degree with the seventh degree and play II-VII-I. ex of C major Dm-Bo-C

Alright my friends, That was a long lesson about how make a chord subsitution in quite some common chord progressions. But there is much more to learn. Click here to learn to construct seven chords.