CONCERTINA. The Irish concertina belongs to a class of instruments known as Free Reed instruments, it is hexagonal in shape and is bellows-blown, with one reed per note. The concertina used in Irish traditional music is the Anglo-model, which is single-action, which means each button has a different note on push and pull. The instrument became popular with mass production, as it was robust and affordable and easy to transport, it was also sought after for house dances, as it was able to make itself heard over the dancers. The concertina has had a long association with the music of County Clare, today it remains a very popular instrument in Irish music.