A Whole Tone Scale on Puerto Rican Cuatro

Play the A Whole Tone scale on Puerto Rican Cuatro with fretboard diagrams that map the pattern across the neck. The Whole Tone scale has 6 notes per octave and belongs to the symmetric family.

A is available as an open course on Puerto Rican Cuatro, and 3 of its 5 open courses are scale tones — B (the 2nd), A (the root), G (the flat 7th). The E and D strings sit outside the scale. Open, the courses cover E3 to G4.

Weightless and dreamlike — six equal whole steps with no leading tone, so nothing pulls anywhere. Blurry, floating, and faintly unsettling, like a dream sequence.

Heard in: Impressionist piano (Debussy's "Voiles"), Thelonious Monk's runs, dream-sequence film cues, and the augmented and 7#5 chords it fits in jazz.

Puerto Rican Cuatro is strung in five courses of two, the lower two paired an octave apart, so each stopped note here sounds as two — which is why the shape rings thicker than the same grip on a single-strung instrument.

Each position shows the scale notes and their intervals from the root so you can connect the shape to its sound, hear it with audio playback, and practice it in any register. Movable patterns let you transpose the same fingering to other keys once it is learned.

Once a position is under your fingers, link the A Whole Tone scale to the chords it harmonizes and to progressions in the key of A to start improvising and writing with it. Working a scale alongside its chords is the fastest way to make it stick and to hear how it colors a progression.