Arpeggios and Alberti Bass

After this lesson, you will be able to preserve chord shapes in ascending arpeggios or low–high–middle–high Alberti bass, apply one pattern across the original 16-measure project, and move without losing pulse or covering melody.

An arpeggio turns harmony into a line

The score uses root–third–fifth–third for triads. G7 uses G2–B2–D3–F3 so the seventh-chord quality is explicit. Apply only C, Am, Dm, F, and G7 from the project; do not add passing chords or change harmonic rhythm.

Prepare each group before beat 1, guide small moves with the wrist, and look toward the next bass on beat 4. If a move delays melody, return temporarily to a root. Evenness matters more than filling every attack.

Alberti means low–high–middle–high

For C, play C3–G3–E3–G3; Am uses A2–E3–C3–E3; Dm uses D3–A3–F3–A3; F uses F2–C3–A2–C3. The oscillation remains recognizably inside each chord.

G7 has four members. The Alberti cell G2–D3–B2–D3 deliberately omits F, so call it reduced support under G7, not a complete voicing. To present the full seventh in the left hand, the four-note G–B–D–F arpeggio is clearer.

Register and balance determine clarity

Keep accompaniment in F2–A3 and melody in C4–A4. Use light, even bass attacks while melody carries direction and greater dynamic weight. A large arpeggio sounds like a competing solo rather than support.

Project version 3 applies root–third–fifth–third to triads and root–third–fifth–seventh to G7 across C–Am–Dm–G7 | C–Am–F–G7 | Am–Dm–G7–C | C–Am–G7–C. AABA still comes from source melody and progression.

Map fingering around destination notes rather than demanding one universal pattern. C and Am may share a comfortable shape, while Dm and F need a different preparation because their low notes sit elsewhere. On G7, allow the hand to travel through G–B–D–F instead of stretching to hold every pitch. Rehearse the last beat of one measure into the first beat of the next; that boundary drill exposes a late bass sooner than repeated full-form runs.

Compare the two textures at equal tempo and volume. Arpeggio has directional contour because its order rises through chord members before turning or completing G7. Alberti circles around a stable center through low–high–middle–high. Choose by the phrase's needed motion, not because one pattern is more advanced. Where melody is active, reduce one bass attack or return to a root so the accompaniment remains subordinate.

Exercise

Write 16 cells, play each four-measure phrase, then add melody. Next use Alberti for triads and complete arpeggios for G7. Choose one complete version and mark two places where less activity clarifies cadence.

Common mistakes

• Symptom: Alberti becomes low–middle–high–middle. Correction: Say “low–high–middle–high” before increasing tempo.
• Symptom: Reduced G7 is called complete. Correction: Include F or label G–D–B–D reduced.
• Symptom: Left hand is loud and rigid. Correction: Reduce force and transfer weight note by note.

Frequently asked questions

Must an arpeggio always rise? No. It may descend or turn, provided the shape is recognizable and playable.

Should pedal connect it? Not yet. Use fingers and inspect boundaries; lesson 48 covers syncopated pedal.

Does Alberti suit every style? No. Choose it for steady Classical-style motion, not by default.