Lak's Divertimento, composed in 1967, is his larger work. As a reminiscence of a musical thinking obliged to traditional formal models, whose syntax did not want to renounce the primeval categories of musical language - melody, harmony and rhythm - it has an anachronistic effect in the context of the contemporary avant-gardes. Not as anachronistic, however, as the compositions of Poulenc, who was of the same generation. Like the Sinfonietta for string orchestra or the Petite suite legere for orchestra, the neoclassical Divertimento also numbers among Lak's works that are distinguished by an atmospherically cheerful mood and elegant tone.