Siku-malta cromatico panpipes. Three ranks (rows) of twelve bamboo pipes of graduated lengths, each stopped by a node, produce a three octave chromatic scale from g to f3.
These panpipes were made in Bristol, UK in 1990 by Adrian Villanueva, an instrument maker from La Paz, using materials he had brought with him from Bolivia. Panpipes have a long history in the Andes, but chromatic sets like this one are a relatively recent development and, according to Mr. Villanueva, are used only in urban music making.