Initially it consisted of ten to fifteen instruments, including tuba, accordion, mandolin and harpsichord, but now typically extends to clarinet, clarinet bass, alto saxophone, tenor saxophone, baritone saxophone, horn, trumpets, tenor trombone, tuba, violins, viola, violoncello, piano, mandolin, accordion and percussion.
Key events here have been performances at the ISCM "World Music Days 2000" in Luxembourg and at Expo 2000 in Hanover.
As its repertoire covers all the most significant contemporary composers, the orchestra has been invited to a number of international festivals and has played in Germany, France, Switzerland, Romania and the Czech Republic.
It also participated in the "World Music Days 2007" in Hong Kong and travelled to Beijing and Chengdu during its China tour in 2008.
[3] Since 2001, the Sinfonietta has arranged an annual international composition which has done much to establish Luxembourg as a European centre for musical innovation.