Editing Concertina (section)

==== Bandoneon ====
{{main article|Bandoneón}}
The [[bandoneon]] (also rendered bandoneón, bandonion) is a German concertina system with an original bisonoric layout devised by [[Heinrich Band]]. Although intended as a substitute for the organ in small churches and chapels, it was soon secularized and is now associated with [[tango music]] due to the instrument's popularity in [[Argentina]] since the late 19th century when tango developed from various dance styles in Argentina and Uruguay.<ref name="Groppa2003">{{cite book|author=Carlos G. Groppa|title=The Tango in the United States: A History|url=https://books.google.com/books?id=WyG_fFUKKLgC&pg=PA69|date=30 December 2003|publisher=McFarland|isbn=978-0-7864-2686-7|pages=69–}}</ref> Though the typical bandoneon is bisonoric, the 1920s saw the development of unisonoric variants such as the Ernst Kusserow and Charles Peguri systems, both introduced around 1925.<ref name="Drago2008">{{cite book|author=Alejandro Marcelo Drago|title=Instrumental Tango Idioms in the Symphonic Works and Orchestral Arrangements of Astor Piazzolla. Performance and Notational Problems: A Conductor's Perspective|url=https://books.google.com/books?id=szmYo-voZJEC&pg=PA16|year=2008|isbn=978-0-549-78323-7}}</ref>{{rp|18}}<ref name="Bugallo1993">{{cite book|author=Rubén Pérez Bugallo|title=Catálogo ilustrado de instrumentos musicales argentinos|url=https://books.google.com/books?id=Ik3Z5r8r_RUC&pg=PA77|date=1 January 1993|publisher=Ediciones Del Sol|isbn=978-950-9413-49-8|pages=77–}}</ref> Bandoneons typically have more than one reed per button, dry-tuned with the reeds an octave apart. "Dry" means that vibrato is absent because the tuning is accurate.<ref name="Drago2008"/>{{rp|18}} The instrument is considered an essential part of the Argentine [[Orquesta típica#Argentina and Uruguay|tango orchestra]].