All of classical music is looking to freshen the concert format - flash opera, rush-hour performances, pop-up serenades. Philadelphia, with its row-home urban fabric, might look at this format, written about by the New York Times. The author caught a window concert in Brooklyn Heights. The piano was turned with the back toward an open window, and chairs for listeners were set up just outside. Read about it here.

Of course, it works only for ensembles of a certain size. For a marching band - say, a Turkish marching band - you really need to close the street, which is exactly what's happening Wednesday between 5 and 7 p.m. at South and Passyunk. Thirty-three members of the Turkish Mehter band, based in Bursa, will be performing on traditional instruments: the kös (a giant timpani), nakare (a small kettledrum), davul (a bass drum), zil (cymbals), kaba zurna (a bass zurna), boru (a relative of the trumpet), and cevgen (a stick with small concealed bells).