The accordion is in a wide variety of musical genres, mainly in traditional and popular music. In some regions, such as in Europe and North America, it has become mainly restricted to traditional, folk and ethnic music. Nonetheless, the button accordion (melodeon) and the piano accordion are widely taught and played in Ireland, and have remained a steady fixture within Irish traditional music, both in Ireland and abroad, particularly in the United States and Great Britain. Numerous virtuoso Irish accordion players have recorded many albums over the past century or so; the earliest Irish music records were made in the 1920s, in New York City, by fiddler and Sligo immigrant Michael Coleman, widely considered to have paved the way for other traditional musicians to record themselves. Accordions are also played within the music of Scotland, as well as other Celtic styles, such as the musical traditions of Northumberland, Galicia, Cornwall and Brittany.
In northern Europe and Scandinavia, despite these musical traditions being somewhat fiddle-heavy, accordions may still be heard from time to time in the music of Denmark, Finland, Norway, Sweden and the Baltic states; the sound of accordion and fiddle played together has been said to be complementary.
In other regions, such as México and Latin America, the instrument is very popular in genres like Norteño, banda, and corridos; in Brazil, it is a fixture in popular music styles, such as Sertanejo and Forró.
In art music, it is used in jazz, an important exponent having been the North American accordionist Frank Marocco, and in transcriptions from the operatic and light-classical music repertoire.
Use in traditional music
After the invention of the accordion in 1829, its popularity spread throughout the world, in no small measure due to the polka craze. "Once the polka became a craze in Paris and London during the spring of 1844, it diffused rapidly to the rest of the world. . . . In March 1844, polka-mania took Paris: common people, servants, workers and, one assumes, anyone else who wasn't too stuffy were dancing the polka in the streets of the capital and soon in Bordeaux and other French cities as well. A week or so later it took London by storm. And from these two great centers of fashion, empire, and influence, the polka diffused rapidly upward into the rest of French and English society and outward to the rest of the world."
Except for a brief moment in time during the 1830s and 1840s when the accordion was heard by French aristocracy during Salon music concerts, the instrument has always been associated with the common people. The accordion was spread across the globe by the waves of Europeans who emigrated to various parts of the world in the late 19th century and early 20th century.
The mid-19th-century accordion became a favorite of folk musicians for several reasons: "The new instrument's popularity [among the common masses] was a result of its unique qualities. Firstly, it was much louder than all the older folk instruments put together. It could easily be heard in even the wildest pub above the stomping of dancing feet. It was also the prototype of a 'one man band' with bass and chords on the left-hand side and buttons for the melody on the right, and you could still sing along and beat the rhythm with your feet. The instrument needed no tuning and was always ready to play, but the most ingenious thing about the early one-row squeezebox was that you couldn't play it really badly. Even if you lost the melody it still sounded fine."
Since its invention, the accordion has become popularly integrated into a lot of varying traditional music styles all over the world, ranging from the European polka and the Colombian Vallenato to Korean trot music. See the list of traditional music styles that incorporate the accordion. Although rarely seen, many early bigband (swing bands like Glenn Miller's) scores have the Piano part marked "Piano/Piano Accordion"
Sometimes, certain traditional music styles may even be tied to a certain type of accordion, like the Schrammel accordion for Schrammelmusik, the Trikitixa for Basque music, or the diatonic button accordion in Mexican conjunto and norteño music. It would be hard to name one country in which the accordion did not play a significant role in its music tradition. It has even been idealized in literature.