A Melodic Minor Scale on Puerto Rican Cuatro

Play the A Melodic Minor scale on Puerto Rican Cuatro with fretboard diagrams that map the pattern across the neck. The Melodic Minor scale has 7 notes per octave and belongs to the common family.

A is available as an open course on Puerto Rican Cuatro, and 4 of its 5 open courses are scale tones — B (the 2nd), E (the 5th), A (the root), D (the 4th). The G string sits outside the scale. Open, the courses cover E3 to G4.

Minor at the bottom, major at the top — the b3 keeps it minor while the natural 6 and 7 lift the upper half into a smooth climb home. Bittersweet rather than dark, with a polished, modern-jazz sheen.

Heard in: Jazz lines over minor and altered chords, film scoring, and classical melodies rising to the tonic — Bach, Mozart, and bebop alike.

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 Melodic Minor 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.