Bandoneon

Overview

The bandoneon is a square free-reed concertina-style instrument developed in 19th-century Germany and adopted, with extraordinary cultural force, as the central voice of Argentine and Uruguayan tango. Its sound — a thick, slightly nasal chord that breathes in and out with the bellows — is so closely identified with tango that it is difficult for many listeners to picture either without the other.

The instrument is bisonoric on most older models: each button sounds a different note when the bellows are pushed than when they are pulled. This makes the bandoneon harder to learn than most accordions and gives it the slightly lurching, sigh-and-breath quality that became central to tango’s expressive vocabulary.

Origin & History

Heinrich Band of Krefeld, Germany gave the instrument its name in the late 1840s, building on earlier German concertina designs by Carl Friedrich Uhlig. The original purpose was prosaic: to provide a portable substitute for a church organ in small congregations and outdoor services. The instrument’s chord-friendly button layout made it a natural fit for hymn accompaniment.

Bandoneons reached the Río de la Plata region — Buenos Aires and Montevideo — through German immigration and the merchant trade in the 1860s and 1870s. Within a generation, local players were adapting the instrument’s hymn-tune repertoire to the dance forms of the immigrant working-class districts of Buenos Aires. By the early 20th century the bandoneon had displaced the flute in the standard tango lineup and become the genre’s lead voice.

The Alfred Arnold workshop in Carlsfeld, Saxony, became the most prestigious manufacturer between 1911 and the Second World War, producing the instruments — known to players simply as “doble A” — that are still considered the gold standard. Production largely stopped after 1949, and surviving Arnold instruments now command very high prices.

Construction & Materials

The Hornbostel-Sachs system places the bandoneon, like all free-reed instruments with bellows, in 412.132. The body is two square wooden boxes joined by a folded cardboard-and-leather bellows. Banks of free reeds inside each box sound when air passes across them.

A standard 142-tone bandoneon — the size most associated with tango — has 71 buttons, 38 on the right hand and 33 on the left. The Rheinische Tonlage button layout used in tango playing is essentially arbitrary: it follows neither alphabetical order nor any consistent musical pattern, and players simply memorise it. The bellows is normally larger than on a comparable accordion, which gives the instrument its distinctive long, slow phrases.

How It’s Played

The player sits with the instrument resting on the thighs, knees together to support the bellows, and operates the buttons with both hands while controlling the bellows direction by the spread of the arms. Tango players normally hold the instrument almost flat across the lap rather than upright as accordion players do.

Bellows control is even more central to bandoneon technique than to accordion technique because the bisonoric layout means a sustained phrase often requires very precise reversals to keep the air supply from running out. The instrument’s expressive range — from a barely audible breath to a heavy chordal punch — comes almost entirely from the bellows arm.

Cultural Significance

The bandoneon is, in cultural terms, the tango. From the early-20th-century Guardia Vieja musicians through the great orchestras of the 1940s and into the work of Astor Piazzolla, the instrument has carried the genre’s identity. Piazzolla’s nuevo tango of the 1960s onward — fusing tango with jazz harmony and classical composition — extended the instrument’s reach into concert halls worldwide.

In Uruguay the instrument plays an equally central role, and the cross-river musical traditions of Buenos Aires and Montevideo are fundamentally inseparable. The Argentine and Uruguayan governments together nominated tango for UNESCO’s Representative List of the Intangible Cultural Heritage of Humanity, and the inscription was made in 2009.

Notable Examples & Recordings

For listening, recordings by Astor Piazzolla — especially Tango: Zero Hour and the Five Tango Sensations with the Kronos Quartet — provide the most influential late-20th-century introduction to the instrument. Older orchestral tango is best approached through Aníbal Troilo and Osvaldo Pugliese. Contemporary players include Dino Saluzzi, Marcelo Nisinman and Daniel Binelli. Surviving Arnold “doble A” instruments from the 1920s and 30s are among the most valuable on the second-hand market.

Related Instruments

• Accordion – the larger free-reed cousin with melody keyboard or buttons
• Concertina – the smaller hexagonal English cousin
• Bayan – the Russian chromatic-button accordion
• Harmonica – the smallest free-reed family member
• Sheng – the Chinese mouth-blown free-reed organ that inspired the entire 19th-century European family

Where to Hear It

Tango venues — milongas — operate nightly in Buenos Aires and Montevideo and most weeks in major cities worldwide. The annual Buenos Aires Tango Festival and Mundial de Tango each August gather players and dancers from dozens of countries. Concert performances of Piazzolla’s repertoire are now standard programming at major concert halls. The Wikimedia Commons category collects performance images and audio.

• Wikipedia: Bandoneon
• Wikimedia Commons: Bandoneons

Learning Resources

Beginners face a steeper start on the bandoneon than on most instruments because of the bisonoric layout — the button arrangement must be memorised before any structured playing is possible. The standard tango method books by Pedro Maffia and the more recent materials by Marcelo Nisinman are widely used. Many serious students travel to Buenos Aires for residencies with established players. Modern unisonoric instruments (which sound the same note on push and pull) exist but are not widely accepted in the traditional tango community.

Frequently Asked Questions

What family is the bandoneon in?
It is a free-reed aerophone with bellows, classed as 412.132 in the Hornbostel-Sachs system — the same family as the accordion and concertina.

Who invented the bandoneon?
Heinrich Band of Krefeld, Germany gave the instrument its name in the late 1840s, building on earlier concertina designs by Carl Friedrich Uhlig. It was originally intended as a portable church-organ substitute.

Why did the bandoneon become central to Argentine tango?
The instrument arrived in Buenos Aires through German immigration in the 1860s-70s and was quickly adapted by local players. Its breathy, expressive tone and ability to play full harmonies suited the dance music developing in the city’s immigrant working-class districts.

What is a “doble A” bandoneon?
“Doble A” refers to instruments made by the Alfred Arnold workshop in Carlsfeld, Saxony between 1911 and the Second World War. These are the most prized instruments among professional tango players.

How is the bandoneon different from an accordion?
The bandoneon is square rather than rectangular, has button rows on both sides (no piano keyboard), is normally bisonoric (different notes on push and pull), and has a button layout that follows no musical logic and must be memorised.

Is the bandoneon difficult to learn?
Yes, considerably more so than most accordions, because of the bisonoric layout and the demanding bellows control needed for tango phrasing. Beginners typically take a year or more to play simple tangos confidently.