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What Are Upper Structure Triads?

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What Are Upper Structure Triads?

Welcome to this tutorial on upper structure triads. Upper structure triads are complex altered dominant chord voicings that are widely used in solo jazz piano performance.

Why "Upper Structure" Triad

You may be wondering why is this type of voicing is called an upper structure triad? Well that’s because there are 2 parts to the chord, the upper structure and the lower structure.

The Lower Structure

The lower structure is the vanilla dominant chord voicing, so for C7, we could play root, 3rd and b7, and if you have a wide stretch we can play those notes like this, we could play just the root and b7, we could play just the 3rd and 7th, and we can also invert that 3rd and 7th. Each of these creates a different LH texture.

The Upper Structure

So what about the upper structure? Well the upper structure is played in our right hand, and the cool thing about these voicings is that we only need to use major triads to construct the 4 most useful and versatile upper structure triads. We must be comfortable with the major triads in all 12 keys & also the inversions.

Why Split The Chord Into 2 Parts?

That’s a very good question! The answer is that it gives us simple formulas to memorise complex altered dominant chord voicings. For example if we want to play a C13#11 chord, we just think D major triad over C7 and with practice that process becomes very quick to visualise until it is an almost subconscious process.

The other key benefit is that by visualising the upper and lower structure as 2 separate entities, we can easily maneuverer and manipulate the shapes in each hand to create many different textures using the same chord colour.

The 4 Common Upper Structures

Download the upper structure cheat sheet which contains the 4 most useful upper structure formulas.

  • The first is US2 which is a major triad built from the 2 or 9. This gives us a 13#11 sound, as our right hand is outlining the scale degrees 9, #11, and 13.

  • Next we have US#4 or #11 which is a major triad built from the #11. This gives us a b9/#11, as our right hand triad outlines #11, b7, and b9.

  • Next we have US#5 which is a major triad built off the #5. This gives us a #5#9 sound, also known as alt. The triad contains the #5, root & #9 and it has a very tense sound.

  • Finally we have US6 or 13 which is a major triad built of the 6 or 13. This gives u a 13b9 sound. Our right hand contains the tones 13, b9, and 3.

So that’s the 4 most common upper structures. In our altered harmony course you can find practice drills and exercises to

Let’s now finish by applying these voicings to 3 jazz standards and use the upper structure cheat sheet as an aid to help us find suitable upper structure voicings for dominant chords in our favourite tunes.

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    Upper Structure Triad Cheat Sheet File Type: pdf

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Related Lessons

UST Drills: b9#11 & #5#9

In this lesson we explore the b9/#11 and #5#9 upper structures. We apply to major 251s and in context of 2 well-known jazz standards.

Intermediate25:23

UST Drills: 13#11 & 13b9

In this lesson we drill UST 2 and UST 6 around all 12 keys. Both USTs contain a natural 13 which makes them related & interchangeable.

Intermediate24:44

Altered Chord Drills: The #11

We will explore a number of drills to familiarise ourselves with the sound, colour, and texture of the #11 chord alteration.

Intermediate16:01

Practice Tips

  • First learn the options available for the left hand. Experiment with the root, 3rd, 7th, and the different inversions.

  • To play these voicings effectively we must be comfortable with the 12 major triads and their inversions.

  • Take an upper structure demonstrated in the key of C and transpose this around the other keys.

  • Experiment with upper structure inversions and doubling the notes at the top and bottom of the triad to create a bigger sound.

  • Check out the altered harmony practice series where we learn and memorise these voicings in all 12 keys.

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