Dom7 Arpeggios: The Sound of Tension (and the Blues)

The short answer: the dominant 7th arpeggio is root, major 3rd, 5th, and ♭7th — a major arpeggio with a flattened top. That one clash (bright 3, dark ♭7) is what makes dominant chords pull: it's the engine of every V–I resolution and the default sound of the blues. Gitori's Dom7 Arpeggios course teaches five ways to play it across the neck.

Why this arpeggio matters more than it should

On paper, Dom7 is just one of four seventh-chord qualities (the full family). In practice it punches way above its weight:

• Every key has exactly one dominant chord — the V — and it's the chord that creates motion. Outline it and your line pushes toward home.
• The blues is dominant chords wall to wall. A 12-bar blues in A is A7, D7, E7 — three Dom7 arpeggios cover every bar with zero wrong notes.
• The 3-and-♭7 pair (the "tritone") is the part of the chord that actually carries the tension. Knowing where both live around any root is half of jazz comping.

The Mixolydian mode is this arpeggio's scale-sized sibling — same 1-3-♭7 fingerprint with the gaps filled in.

What the course covers

Five patterns for traversing 1-3-5-♭7 across the neck, taught one per lesson, drilled individually, then mixed in the Find Arpeggios game: random key, random highlighted zone, clock running. As with the other arpeggio courses, the point of five fingerings is phrasing freedom — the right shape is always under your hand when the V chord arrives.

Before you start

Scale degrees via the degree courses, and ideally the Major Arpeggios course first — Dom7 is the major arpeggio with one note swapped, and that's exactly how the shapes are easiest to learn.