Classical musicians in the 19th century discarded older instruments in favor of newer designs from makers such as Boehm, Albert, etc.
[4] These discarded instruments eventually found their way into the hands of folk musicians and the "treujenn gaol" was born.
In the traditional pieces, only the clarinet register is used (overblow flap open).
[7] The best-known Breton clarinetists are probably Christian Duro and Erik Marchand, a former member of both Quintet Clarinettes and Gwerz.
[citation needed] The bands Termajik, Kentan, Darhaou, Tonnerre de Brest, L'Echo, Cabestan and Strobinell also use clarinets.