The music left by the Czech composers imprisoned in Terezin and then murdered by the Nazis during World War II is one of the marvels of twentieth century art. Had they lived and continued to write, the work of Viktor Ullmann, Hans Krasa, Pavel Haas and especially Gideon Klein would surely have taken its place beside that of the masters of the period.

The first movement of the Quintet - For Gideon Klein - develops from the opening motive of his Piano Sonata, and the entire movement grows out o...