Pump organ
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The pump organ or reed organ is a type of organ that uses free reeds to generate sound, with air passing over vibrating thin metal strips mounted in a frame. Types include the pressure-based harmonium
John Church and Co. pump organ
A hand-pumped Indian harmonium, of the type used in South Asia, here used at a European jazz festival.
Chinese sheng mouth organ.
Free reed from an 1860s melodeon.
Accordion
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Accordions are a family of box-shaped musical instruments of the bellows-driven free reed aerophone type. The essential characteristic of the accordion is to combine in one instrument a melody section
Pump organ
…that maintaining constant pressure in the bellows was difficult and could cause pitch fluctuation. In tone generation, a reed organ is similar to an accordion or concertina, but differs in installation; while accordions are hand-held, reed organs are typically placed on the floor within a wooden casing (which…
A piano accordion (top) and a chromatic button accordion (bottom)
Eight-key bisonoric diatonic accordion (c. 1830)
An accordionist
A group of accordionists in Ticino (early 20th century)