multiple flutes

Double flutes fall into one of several categories: (1) those having parallel, connected pipes, usually with a duct, such as are found in Europe, Asia, America, and the Pacific; (2) double vertical flutes without duct, found in Africa; (3) double cross flutes. The last are played in Asia, Africa, and the Pacific. Typically they are of bamboo, either stopped at each end, with internal node and blowhole on either side of the node, or else they have open ends, one or...