Good tango music cannot be produced without bandoneon....

The Argentinian bandoneón is a two-voice instrument with 71 buttons. Each button plays a different note depending on whether the bellows are opened or closed. The instrument originally had 60 notes disposed over 30 buttons, but that quickly changed to 130 notes. By the beginning of the 20th century, a 142-note version with 71 buttons had become standard in South America.

The bandoneón is an offshoot of a family of German instruments called Korcertinas, invented around 1845.The first bandoneón was in fact a Konzertina made around the year1856 and to which the commercial name of "bandoneón" was given in memory of Einrich Band, who had a music shop in North Germany.

Bandoneón was quickly adopted in Buenos Aires, and became the symbol of Tango. It has never been built in Argentina, however. Most bandoneóns were made by the German maker Alfred Arnold from 1911, up until a few years after WWII. Most of the bandoneóns used in tango sites today are from this period. (The bandoneón which will be used for our show was fabricated in 1924.)
www.gardelweb.com/bandoneon.htm