Le Carnaval was composed in February 1886 while Saint-Saëns was vacationing in a small Austrian village. It was originally scored for a chamber group of flute/piccolo, clarinet (B flat and C), two pianos, glass harmonica, xylophone, two violins, viola, cello and double bass, but is usually performed today with a full orchestra of strings, and with a glockenspiel substituting for the rare glass harmonica.
VII- Aquarium
Strings without double-bass, two pianos, flute, and glass harmonica: This is one of the more musically rich movements. The melody is played by the flute, backed by the strings, on top of tumultuous, glissando-like runs in the piano. The first piano plays a descending ten-on-one ostinato, while the second plays a six-on-one. These figures, plus the occasional glissando from the harmonica—often played on celesta or glockenspiel—are evocative of a peaceful, dimly-lit aquarium.
