Master Class brings together young performers and established "masters", the vital witnesses of the history of music. Here, Walter Levin, founder of the Lasalle Quartet in the 1950s, works on Beethoven's Opus 59 nº3 with the Castagneri Quartet. It is a difficult score, signalling the passage to modernity, the opening onto the music of the 20th century. Walter Levin's vast knowledge of the texts and repertoire guides the young musicians on the paths of interpretation.