Accordions

Types of Accordions

While they share the same fundamental mechanism, accordions are categorized by the design of their treble (melody) and bass keyboards:

Piano Accordions: Feature a standard piano-style keyboard for the right hand and button-operated bass chords for the left hand.
Button Accordions: Feature buttons for both the melody and bass sides. These can be further split into chromatic (plays any note in any key) and diatonic (notes change depending on whether the bellows are pushed or pulled, common in Norteño and folk music).

Digital/V-Accordions: Electronic instruments that replicate acoustic accordion sounds using digital synthesis.

Mechanics and Construction

The accordion is essentially a complex wind and reed instrument. Its inner workings include:

Bellows: The folding center that acts like lungs, controlling air pressure and volume. [1, 2, 3]
Reeds: Metal strips that vibrate when air passes over them. The reeds are housed inside harmonicas and are mounted to the instrument’s wooden or plastic components with special sealing materials like beeswax. [1]
Valves: Leather or Mylar flaps that allow air to flow through the reeds in only one direction, enabling different notes to play when pushing versus pulling. [1]