Nathaniel School of Music

The Cascading Cluster Exercise: Cinematic Piano Arpeggios

The Cascading Cluster exercise builds cinematic piano arpeggios by holding three adjacent notes as fixed pivots under the index, middle and ring fingers while the thumb, pinky or both float to new notes, played in groups of four (4/4) or up-and-down groups of six (6/8).

Video lesson by Jason Zac · Intermediate · 27 min

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Key points

What this lesson teaches

This exercise from Jason Zac at Nathaniel School of Music gives you a quick way to create the flowing, emotional piano arpeggios heard in film scores, background music and solo piano themes. There is very little chord theory involved. Instead of thinking in chords, you hold a cluster of three neighbouring notes and let one or two other notes float around them. It suits pianists who can already play simple patterns hands together and want to start improvising or composing thematic music.

Step 1: Learn the three clusters

Jason gives three sets of three adjacent notes. Each set is played with the index, middle and ring fingers of the right hand. These are your pivots, and they do not change throughout the exercise.

Knowing the scale each cluster belongs to helps when you choose floating notes, so it is worth writing the scale down.

Step 2: Add a floating thumb

Add one more note below the cluster, played by the thumb. On C#, D#, E a good starting note is G#. Do not reach too far down, or your hand becomes stretched and tense. Keep it relaxed.

Pattern 1: groups of four (4/4)

Play thumb, then the three pivots upwards, as sixteenth notes counted 1 e and a. This gives a steady, driving arpeggio.

Pattern 2: up and back down (6/8)

Play thumb and the three pivots going up, then come back down through the middle notes, giving six notes per group. Feel two strong beats in each bar. Jason prefers this one for its more laid-back, swaying feel.

Step 3: Float the thumb to new notes

Now move the thumb to different notes while the pivots stay put. Over C#, D#, E try A, B or G, or even A#/Bb, which lies outside C# minor but gives a dramatic, spy-film colour. Since you have not committed to any chord, notes outside the key can still sound good. Try a few and string your favourites into a progression, such as A, G#, B, Bb.

Step 4: Wake up the left hand

Even with no bass movement the sound is intense. You can simply hold the root (C# for the first cluster) to build tension, then release it in a later section by moving the bass. When choosing bass notes, Jason likes the left hand to form a third with something in the right hand for richer harmony. Some choices will not work, so explore. You can float the thumb only, the bass only, or both.

Step 5: Change direction and use the pedal

Reverse the arpeggio so it moves downward, or combine down and up, and try playing higher on the keyboard. Use the sustain pedal: neighbouring notes resonate together and give a dreamy sound with extra harmonic content.

Step 6: Float from the top

Do the opposite of what you have been doing. Remove the thumb note and let the pinky float above the pivots instead. On C, D, Eb, the pinky moves between notes above Eb while the cluster stays fixed.

Bonus: float both ends

Float the thumb and pinky at the same time for a bigger, eight-note arpeggio. The two floating notes need not be the same note name, so experiment. This builds finger independence, with every finger playing its own role.

How to practise

  1. Learn each cluster with fixed fingering, then add a single thumb note in both patterns.
  2. Explore floating notes and build a short progression.
  3. Add a held bass, then a moving bass.
  4. Build several sections, mixing bottom floats, top floats and direction changes, aiming for two to five minutes as if scoring a film scene.
  5. When ideas run dry, change volume and register (soft and high, low and intense) or articulation (legato versus staccato).

Think like a storyteller: the choices you make can turn the same material romantic, dark or scary.

Questions about this lesson

What is a cascading cluster arpeggio on piano?

It is an arpeggio built from three neighbouring notes held as fixed pivots, plus one or two floating notes played by the thumb or pinky. Moving the floating note while the cluster stays put creates a cinematic, film-score sound without thinking about chords.

Which fingers play the three-note cluster?

The index, middle and ring fingers play the three pivot notes and stay on them throughout. The thumb floats below and, later, the pinky floats above.

How do I play this pattern in 6/8 instead of 4/4?

For 4/4, play thumb plus the three pivots upward as four sixteenth notes. For 6/8, go up through the cluster and come back down, making six notes per group with two strong beats per bar.

What should the left hand do?

You can simply hold the root, such as C# for the C# D# E cluster, to build tension, then move the bass in a later section to release it. Choosing bass notes that form a third with the right hand often gives rich harmony.

Practise it

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