We often think of classical music as having a specific geographic origin, and indeed there are a lot of generalizations that can be made about the classical traditions of different countries. The French we often think of as expert colorists, the Germans as very structural in approach, and the Italians as melodic masters. But with a piece like Souvenir de Florence, a Russian composer’s memory of Florence, Italy, presented under a French title, those generalizations won’t help you much. Before the sextet, we’ll hear a set of three songs by Russian composers, starting with Glinka’s “Train Song” and ending with Mussorgsky’s famous “Song of the Flea.” In the middle is Tchaikovsky’s aria “Don Juan’s Serenade.” In fact, this song was part of a set begun during one of Tchaikovsky’s trips to Florence. In “Don Juan’s Serenade” we have Spanish character, a Russian poem and an Italian vacation. You definitely can’t pin it down by geography, but when the music is this enjoyable, who cares?