Firstly, a lesson in Roman Numerals:
I = 1
II = 2
III = 3
So far, so good!
But then:
V = 5, therefore:
IV = 4 (the I for 1 is before the V for 5, so it’s like 5 - 1 - see?)
And we can work the other way in a similar way too:
VI = 6
VII = 7
And just in case we need it,
VIII = 8.
If you’ve been cross referencing with the title of this very post, you will have realised that I am referring to chords 1, 4 and 5.
But what are they? Why are they important? How do we find them?
So…many…questions!
Let’s break it down and start with…
The C Major Scale
C major is just going to be our example scale here because it’s easy and it’s the one that most everyone can relate to because it’s where we all start learning.
The notes of C major are:
C - D - E - F - G - A - B, then of course, it resumes back to C and continues on an indefinite loop of musical trauma.
The note C of a C major scale is…the root note! Simple, really. The root note is just the note after which the scale is named. And more inkeeping with this, the root note is I (one).
It doesn’t take a long time to be able to work out the numerical values of the rest of the notes. In fact, we cover it several times - for example, when learning intervals.
But, just to recap, here they are:
C = 1 (I)
D = 2 (II)
E = 3 (III)
F = 4 (IV)
G = 5 (V)
A = 6 (VI)
B = 7 (VII)
So, if we extract numbers 1, 4 and 5 from here, we would be referring to C, F and G respectively.
When we are referring to 1, 4 and 5 of a major scale, all of these chords are major. So, to clarify, C major, F major and G major are chords I, IV and V of C major. However, as you may have already learned, major chords don’t need clarifying; we can just say C, F and G.
To find a simple chord of three notes (a triad), we just need to find the root note of each chord. For C, this would be C, for F it would be F and for G it would be G. These are the root notes of each chord. We then need to stack to third intervals above it, but always being mindful of the scale we are in.
This is nice and easy with the C major scale because it’s purely white note based, but basically we want to leave a note between the first two notes and a note between the second two notes of each chord:
C - D - E - F - G = C major
F - G - A - B - C = F major
G - A - B - C - D = G major
And there you have it - chords I, IV and V of C major.
Play these chords one after the other - or, better still, listen to how they sound in different orders. Don’t feel you always have to rise up to the next chord. Maybe go from your C major up to F major and then down to G major. It’s a less easy jump, of course, but it will give you an idea of how the movement can affect the sound you’re creating.
If you know your scales, try and find chords I, IV and V for other major scales that you know.
Let’s do one more together:
A major is:
A - B - C♯ - D - E - F♯ - G♯
A = 1 (I)
B = 2 (II)
C♯ = 3 (III)
D = 4 (IV)
E = 5 (V)
F♯ = 6 (VI)
G♯ = 7 (VII)
So chords I, IV and V would be A, D and E, all major.
To find the chords, use the respective chord names as the root notes and then leave a note between the first two and the second two notes:
A - B - C♯ - D - E = A major
D - E - F♯ - G - A = D major
E - F♯ - G♯ - A - B = E major
And there you have it!
Making Music with Chords I, IV and V
You may or may not be surprised and excited to learn that a tremendous amount of music bases itself around a I, IV, V structure. This isn’t to say that the chords appear in this specific order, but you may find songs that use I, V, IV, I, I, V, IV, I. Or perhaps they start with V then move to I, then IV and back to I.
As with the individual notes on a piano, there are unlimited possibilities when it comes to chordal structure - even when we only limit ourselves to just three!
Let’s assume that everything we are playing is in the key of C major.
Play the chord of C major, then rise up to F major, then to G major.
Does this sound familiar?
Perhaps if we put a melody over the top:
Or perhaps a different melody:
Or…
Maybe at the end instead of holding onto that G major, we’ll fall back down to F major: thus our structure is C - F - G - F (I, IV, V, IV).
A simple melody over this could be:
In fact, on my cadences blog last week I also demonstrated ‘Crash’ by the Primitives as an interrupted cadence. This is exactly the same chord structure.
Changing the Rhythm
Chords don’t have to be as regimented as one per bar!
Using the exact same idea, we will use chords I, IV and V across two bars. That’s one bar for I - C major, - and then one bar for IV and V - F and G - one minim each!;
If I were to have asked you about the similarities between Denis, La Bamba, Twist and Shout, Wild Thing, Crash and Lucy in the Sky with Diamonds then you may be forgiven for not having realised there was one. Because they’re all completely different pieces of music!
But they all stem from that same chord structure, and this points so well to the unlimited possibility of music. If you can use three chords to create this much versatility, imagine if we started to bring in all seven! And that’s just all seven of the scale!
That, however, is not for now!
Chords I, IV and V in Classical Music
What I have demonstrated above is largely rock and roll, which thrived on I, IV and V thanks to the accessibility of playing them and them sounding full and ‘chunky’ at the one time brand new electric guitar!
Whilst it seems that this music is right on the other side of the musical spectrum to classical music, it isn’t. In fact, western classical music theory bases itself very heavily on using chords I, IV and V.
However, there is one slight difference to chord V in the classical context.
I introduced this last week in my cadences blog, but please welcome back - by popular demand:
The Dominant Seventh
Unlike last week where I got carried away, I’m only going to introduce you to the one technical term in this blog: The Dominant.
Every note in the scale has a fancy name as well as a numerical degree and a letter name. And root, if that note happens to be the root.
The Dominant is the fifth degree.
So, in C major:
C = 1, D = 2, E = 3, F = 4, G = 5!
The dominant seventh refers to the chord of the fifth degree but as a seventh chord.
So, in classical music, I, IV and V would be written as I, IV and V7. Specifically - in C major - those chords would be C, F and G7.
So how do we find a G7?
We find our simple major triad (G - B - D, as we discovered earlier in the blog) and we add a seventh interval - keeping in mind the key we are in* (C major)
G = 1
A = 2
B = 3
C = 4
D = 5
E = 6
F = 7
So, our G7 would be G - B - D - F. As discussed briefly in last week’s cadence blog (seriously, you’ve got to read this blog. It’s a page turner), it’s standard music theory practise to keep chords consistently ‘voiced’ i.e. same number of notes per chord, and because we use triads of C major and F major, it’s very common to see a note dropped from that G7 chord. You may see a G7 as G - B - F or G - D - F or one of their inversions, but it’s still the chord.
*because if we assume we’re using a G major scale we would stick an F# on the top and that’s a different type of seventh chord 🤦 oh so many rules! If you want the academic way to approach a standard seventh chord, it’s a major triad with the minor seventh interval over the top. Maybe one day I’ll blog about the other types of seventh chord, but for now that’s the only one you’ll need!
Conclusively, in classical music, you would see chord V instead as V7 - the dominant seventh - more often than not:
Try It Yourself
The basis of an awful lot of songwriting comes from using this chord structure in some capacity, so why not try writing your own short melody over the top of those chords in whichever order you like the sound of. If you want a more classical sounding melody, remember the dominant seventh!
Learning to hear these chords is a really strong tool you can have at your disposal, so watch my short YouTube series to learn more about how to develop your musical ear to this end:
In fact, subscribe to my YouTube channel so you never, ever, ever miss a video like this!
Jack Mitchell Smith is a piano teacher based in Macclesfield, Cheshire. Click here to find out more.
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