Action
Most diatonic button accordions have a "single-action" (or "bisonoric") keyboard, meaning that each button produces two notes: one when the bellows are pressed or pushed (closed) and another when the bellows are drawn or pulled (opened). In this respect, these instruments operate like a harmonica.
(In contrast, most other types of accordion, for example piano accordions and chromatic button accordions, are “double-action” – or “unisonoric” – because each key produces a single note regardless of bellows direction.)
Other single-action or bisonoric members of the free-reed family include the German concertina, the Anglo-German (or “Anglo”) concertina, the bandonion, and the Chemnitzer concertina (see concertina).
There are varieties of diatonic button accordion that are double-action, such as the garmon.
Read more about this topic: Diatonic Button Accordion
Famous quotes containing the word action:
“We need a type of theatre which not only releases the feelings, insights and impulses possible within the particular historical field of human relations in which the action takes place, but employs and encourages those thoughts and feelings which help transform the field itself.”
—Bertolt Brecht (1898–1956)
“Let the will embrace the highest ideals freely and with infinite strength, but let action first take hold of what lies closest.”
—Franz Grillparzer (1791–1872)
“A thought which does not result in an action is nothing much, and an action which does not proceed from a thought is nothing at all.”
—Georges Bernanos (1888–1948)