The term 'BIG STRINGS' refers to two musical instruments, the celli and the cellos. The celli is a stringed instrument of the violin family, with five strings and a deeper, more resonant sound than the violin. The cellos are also a stringed instrument of the violin family, but they have six strings and a lower pitch than the celli. Both instruments are used in classical music, as well as in jazz, rock, and other genres.