How does the bass work on an accordion?
In a Stradella bass system, the pattern of buttons consist of single notes and fixed chords (usually three notes to a chord). In a Free Bass system, the buttons are all single notes, like on a piano. This system is mainly used for classical music. On Concertina’s and Bandoneon’s the bass only plays single notes. See Types of Accordions and How they Work for more detailed information.
