The ensemble ARS CAMERALIS is famous in its double performance activity, including 13th to 15th century music on the one hand, and contemporary music on the other. The ensemble's rich repertory is still being extended not only by the new transcriptions of historic music, mostly supplied from the original sources - medieval manuscripts, but also by new 20th-century works.
The art director of the Ars Cameralis ensemble, the composer and clarinetist LUKAS MATOUSEK studied the Conservatory in Prague and Janacek's Academy in Brno. He studied medieval music and medieval musical instruments in London. He gave lectures on medieval musical instruments and the interpretation of medieval music at international musicological conferences. He has written a book, "Musical Instruments of the European Middle Ages".

(Lubomir Havlak - vl, Petr Macecek - vl, Jan Jisa - vla, Jitka Vlasankova - vcl) The Martinu Quartet came into existence in 1976, and originally was called Havlakovo (until 1985). The members of this quartet studied at Prague Conservatory under Viktor Moucka, and at the Academy of Performing Arts under Antonin Kohout. They participated in a number of courses led by members of internationally important quartets, and won awards in several international competitions, for example in Prague Spring Festival, Portsmouth (Great Britain), ARD Munich, Evian (France). The quartet gives concerts regularly both at home and abroad (Europe, USA), organizes regular tours (Holland, Spain), takes part in international festivals (Prague Spring, Arjeplog, Sweden; Orlando Festival, Holland; Bath in England, and others) and they collaborate with radio and television. Their repertory includes compositions of the world quartet literature, focusing mainly on Bohuslav Martinu's works. Many compositions as performed by the Martinu Quartet have been recorded on CDs.