An arranger keyboard is a type of electronic keyboard designed to provide a wide range of auto-accompaniment features, allowing musicians to easily create full-sounding performances with backing tracks. These keyboards are equipped with built-in styles, rhythms, and sounds that can automatically generate chord progressions, bass lines, and drum patterns based on the player’s input. By playing simple chords with the left hand, the keyboard can produce a full arrangement, which is why it’s popular among solo performers, songwriters, and hobbyists.

Arranger keyboards typically feature a variety of sounds, such as pianos, strings, guitars, and synthesizers, as well as complex style variations that can range from pop and rock to jazz, Latin, and classical. They often include functions like chord recognition, automatic fills, intros, endings, and variations that enable users to customise their performances easily. High-end models also offer advanced features like vocal harmonisers, multi-track recording, and extensive editing capabilities, making them useful for both live performances and arranging compositions.