The modern accordion has three main sections which consists of the expandable bellows and the two end units, which are wooden and are called the treble and bass sections. The treble end of the accordion has an attached keyboard. The bass end features finger buttons that play bass notes and chords. The reeds and electric components are located on the inside of the bellows. The accordion uses freestanding reeds to create sound, comparable to the harmonica.
The reeds are made of metal strips that are riveted to either side of the rectangular metal plate. Below is a slot which allows air to flow through the bellows. A plastic or leather flap is placed to prevent airflow, and the keyboard on the treble side of the accordion varies. A popular style of the accordion is the piano type keyboard.
