Triad Pairs · Jazz Wiki

A triad pair is two triads with zero notes in common, played together as a six-note (hexatonic) scale. The idea solves a real improvising problem: pure modal scales can sound like scale exercises, while pure arpeggios can sound static — a triad pair gives you the harmonic clarity of arpeggios (you’re always outlining a recognizable triad) plus the motion and color of a scale, without ever touching all seven notes of the mode.

What Happens When You Stack Two Triads

Take a major triad and build another major triad a whole step above it. Nothing shared, six notes total, and the result is not some exotic invention — it’s Lydian.

C major triad: C – E – G
D major triad: D – F♯ – A
Combined hexatonic scale: C – D – E – F♯ – G – A (C Lydian, minus the 7th degree B)

C + D major triads

F♯3

D major triad

Two major triads a whole step apart share zero notes — merged, they spell the six-note hexatonic C–D–E–F#–G–A, C Lydian minus its 7th

This “major triad a whole step up” pair is the single most-used triad pair in modern jazz vocabulary, largely because Walt Weiskopf built an entire method (Intervallic Improvisation) around it. Play the two triads as broken arpeggios rather than a straight scale run and you get the wide, angular thirds-and-fourths shape that defines a lot of post-Coltrane saxophone language — a texture closely related to Intervallic Improvisation in general.

Broken as arpeggios, the two triads trace the full C–D–E–F♯–G–A hexatonic scale:

Diatonic Pairs Hiding Inside a Major Scale

Triad pairs don’t have to imply a color outside the key — you can pull two triads straight out of the major scale itself and get a built-in six-note subset of that scale.

F major triad + G major triad (over Cmaj7): F–A–C and G–B–D = six of the seven notes of C Ionian
Over an F tonic instead, the same F+G pair reads as F Lydian: F–G–A–B–C–D

Played as broken triads over a static Cmaj7, F and G major together outline six of C Ionian’s seven tones:

This is the cleanest way to teach the concept, because the ear already knows the sound of the underlying scale — you’re just choosing which six of the seven notes to emphasize, and doing it in triadic shapes instead of scalar runs. It also shows why triad pairs are considered a subset of Chord-Scale Theory rather than a break from it: every pair comes from some parent scale, whether that’s a major scale, a mode of melodic minor, or something more symmetric.

Beyond Major Triads: Minor Pairs and Symmetric Scales

Because a triad pair is defined only by “zero shared notes,” the two triads don’t need to match in quality, and the parent scale doesn’t need to be a major mode.

D minor triad + C major triad (over Dm7): D–F–A + C–E–G = D Dorian, six notes
G major triad + A minor triad (over Cmaj7): G–B–D + A–C–E = a brighter, more tension-laden color for a maj7 chord — see Melodic Minor Applications for how these mixed-quality pairs map onto altered and Lydian-dominant contexts
Two augmented triads a semitone apart (C+ and C♯+) generate the six-note Augmented Scale, a favorite device for superimposing tension over static harmony

That augmented case is worth dwelling on: it’s built from The Augmented Triad, and because augmented triads divide the octave symmetrically, the resulting hexatonic scale has a spookier, more ambiguous key center than the diatonic pairs above — closer in effect to the whole-tone sound world than to Lydian.

Using a Pair as Color, Not Just as Scale

Once you can hear a pair’s home sound, the real payoff is borrowing a non-diatonic pair and laying it over a chord where it doesn’t “belong” — a form of Harmonic Superimposition closely related to Upper Structure Triads and to deliberate outside playing. A D♭ major triad plus an E♭ major triad over Cmaj7, for instance, lifts the whole line a half step out of the key — the same wrong-key brightness as Side-Slipping, but delivered in strong triadic shapes instead of a transposed lick. This is also where triad pairs intersect with Digital Patterns and Pentatonics in Improvisation: all three are ways of choosing a small, shapely note pool and repeating its intervallic contour rather than running a full scale top to bottom.

♫ Listen

McCoy Tyner — “Passion Dance” (The Real McCoy, Blue Note, 1967): the opening vamp and Tyner’s right-hand patterns stack triadic shapes over a static left-hand groove — a clear demonstration of hexatonic triad thinking used for rhythmic drive, not just color.
Joe Henderson — “Inner Urge” (Inner Urge, Blue Note, 1964): in the tenor solo around 1:50–3:10, listen for fast, angular arpeggiated cells that leap between triadic shapes rather than running scales — transcribers point to this passage as a textbook triad-pair line over modal changes.