The Alberti bass pattern is a hallmark of which musical period?

• A. Classical
• B. Baroque
• C. Romantic
• D. 20th Century

Answer: (A)

The main idea is how a specific left-hand accompaniment signals a historical style in keyboard music. The Alberti bass is a repeating broken-chord pattern—low note, high note, middle note, high note—that became a defining way to accompany the melody in Classical-era piano works. It gives a light, balanced, and steady texture that supports the right-hand melody without crowding it, which matches the Classical aim for clarity and formal balance. The pattern is named after Domenico Alberti, whose keyboard pieces helped popularize this figure, and it’s widely associated with composers from the Classical period such as Mozart and Haydn. While earlier music used broken chords, this particular pattern became especially characteristic of Classical keyboard writing. In Baroque music, accompaniment often centers on continuo and polyphony rather than this regular left-hand figure; Romantic music pushes for thicker textures and more expressive harmony; and 20th‑century music explores a wide range of textures beyond this traditional pattern.