Modern Modalism: Weakened Function and the Power of Parallel Chords in Piano Improvisation

Modern modalism represents a revolutionary departure from centuries of traditional harmonic thinking. For pianists and organists seeking to expand their improvisational vocabulary, understanding how to weaken functional relationships between tonic, subdominant, and dominant opens up entirely new sonic landscapes. This approach prioritises colour and texture over the predictable pull of conventional chord progressions, creating music that floats and breathes rather than marches towards inevitable resolutions. All techniques, practice tips, and modal improvisation ideas in this article apply equally to organists, and we’ll be including a dedicated video demonstration of organ improvisation as an additional resource.

Traditional harmony operates like a well-oiled machine, with each chord serving a specific function and leading inevitably towards the tonic. The dominant chord creates tension that demands resolution, the subdominant provides preparation, and the tonic offers rest. This functional relationship has served Western music beautifully for centuries, but it can also feel restrictive to the modern improviser.

In modal thinking, we deliberately weaken these functional relationships. Instead of chords that push and pull with gravitational force, we create harmonic environments that allow melodies to explore freely. The result is music that breathes rather than races, that contemplates rather than concludes.

“Modal jazz gives the soloist greater freedom and greater choice when improvising,” notes jazz educator Mark Levine. This freedom comes from the absence of strong harmonic momentum – chords exist for their individual colour rather than their role in a larger harmonic journey.

The practical application begins with reconsidering how we voice chords. Rather than thinking in terms of root position and inversions designed for smooth voice leading, modal harmony embraces parallel movement. When chords move in parallel motion, they maintain their internal structure whilst shifting as complete units. This creates waves of harmonic colour that support rather than direct the melodic line.

Parallel seventh chords represent the cornerstone of modern modal piano technique. These rich, four-note structures add sophisticated colour whilst simultaneously breaking down traditional harmonic function. When seventh chords move in parallel motion, each chord maintains its internal intervals whilst the entire harmonic unit shifts up or down.

The beauty of parallel sevenths lies in their ambiguity. Unlike triads, which clearly establish their harmonic function, seventh chords contain internal tensions that prevent clear resolution. A Cmaj7 chord doesn’t demand resolution the way a dominant seventh does – it simply exists, creating a harmonic environment that supports modal exploration.

These parallel structures create what jazz pianist Herbie Hancock describes as “floating harmony” – chords that drift rather than resolve. The technique works particularly well in modal contexts because it reinforces the non-functional nature of the harmony whilst providing rich textural support for improvisation.  Check out our Herbie Hancock piano masterclass.

Practically speaking, try this: Take a simple Dm7 chord (D-F-A-C) and move the entire structure up and down the keyboard in parallel motion. Each chord maintains the same intervallic relationships (minor third, perfect fifth, minor seventh), but the harmonic colour changes with each movement. This technique immediately creates a modal sound world that feels both ancient and contemporary.

Few melodies demonstrate modal beauty as effectively as “Londonderry Air” (also known as “Danny Boy”). This Irish traditional tune operates primarily in the Mixolydian mode, with its characteristic flattened seventh degree creating that distinctive Celtic melancholy. For pianists and organists beginning their modal journey, this melody offers the perfect laboratory for experimentation.

The genius of using “Londonderry Air” lies in its inherent modal structure. The melody naturally avoids strong functional progressions, instead moving through scalar patterns that emphasise the modal character. When improvising on this tune, focus on supporting the melody with parallel seventh chords rather than traditional ii-V-I progressions.

Begin by establishing the tonic (let’s use G Mixolydian) with a simple GMaj7 chord. Instead of moving to traditional dominant and subdominant relationships, explore parallel movement: GMaj7 moving to FMaj7 to EmMaj7. These chords don’t function traditionally – they simply provide harmonic colour that supports the modal character of the melody.

The approach transforms improvisation from chord-change navigation to melodic storytelling. As jazz educator Barry Harris noted, “When you stop thinking about chord changes and start thinking about melody, the music becomes more personal, more expressive.”

The Maestro Online’s Renaissance improvisation methods offer a surprisingly accessible entry point into modal thinking. Renaissance musicians understood modal harmony intuitively, creating sophisticated music with remarkably simple harmonic structures.

The revolutionary aspect of Renaissance improvisation lies in its economy of means. You genuinely only need to start with two chords to create compelling modal music. Take a simple i-VII relationship in Dorian mode (Dm-C, for example). This two-chord structure provides enough harmonic support for extensive melodic exploration whilst maintaining the modal character throughout.

This approach strips away the complexity that can overwhelm beginning modal improvisers. Instead of memorising complicated chord progressions, you focus on melodic development within a stable harmonic environment. The result is music that feels both grounded and free, ancient and contemporary.

Renaissance composers like Palestrina and Byrd created entire compositions using these simple modal relationships. Their music demonstrates that harmonic sophistication doesn’t require harmonic complexity – sometimes the most profound musical statements emerge from the simplest structures.

The practical application involves establishing your two-chord foundation, then exploring the modal scale melodically. In D Dorian over a Dm-C progression, you have access to all the white keys plus B♭. The characteristic raised sixth degree (B natural) creates the distinctive Dorian sound, whilst the modal harmony supports extended melodic exploration.

Modern modalism offers pianists and organists a pathway beyond the constraints of functional harmony. By weakening traditional tonic-subdominant-dominant relationships and embracing parallel chord movement, particularly with seventh chords, we create musical environments that prioritise colour and texture over resolution and progression.

The journey begins simply – with “Londonderry Air” as your modal playground and Renaissance two-chord structures as your foundation. These approaches demonstrate that modal thinking isn’t about abandoning structure, but about finding freedom within new harmonic frameworks. Whether you’re exploring the floating harmonies of parallel sevenths or the elegant simplicity of Renaissance techniques, modal improvisation opens doors to musical expression that feels both timeless and refreshingly contemporary.

The key lies in patience and exploration. Unlike functional harmony, which provides clear roadmaps, modal thinking requires developing your ear for colour and texture. But the reward – music that breathes and flows with natural freedom – makes the journey worthwhile for any serious improviser.