Alberti bass
/alˈbəːti ˌbeɪs/Music
noun
Especially in keyboard music: a style of bass accompaniment consisting of broken chords, the notes being played in a repeated pattern in the order lowest, highest, middle, highest; a bass part written or performed in this style.
Origin
Mid 19th century; earliest use found in The Athenaeum. From the name of Domenico Alberti, Italian singer, harpsichordist, and composer + bass.