An accordion module, which is designed for use with a MIDI-equipped digital accordion, focuses on providing synthesized and/or sampled accordion sounds (and sounds for related bellows-pumped instruments, such as bandoneon and concertina). Like other specialized sound modules, accordion modules also have other sounds (piano, string orchestra, flute, etc). Moreso than for other sound modules, accordion modules are likely to also have music sequencer, drum machine, and backing track features, to enable a performer to do a one man band show. Accordion modules are manufactured by firms such as Ketron and Soltron.