Today's early morning mystery piece was Maurice Ravel's La Valse. Georges Pretre conducted the Radio Symphony Orchestra of Stuttgart (Hanssler 93013.) Congratulations to Robert, who guessed via e-mail at btre...@wxxi.org. Tomorrow, we'll hear a work by a Czech composer which, by 1952, had been performed a thousand times at Prague’s National Theater. Hear a daily mystery piece at around 6:40 a.m. on Classical 91.5.