SIKU (panpipe) is originally from the Aymaras of Perú and Bolivia. It is traditionally found all across the Andes, and is the main instrument used in a musical genre known as sikuri. The pipes are made from bamboo tubes, but have also been made from condor feathers, bone, and many other materials. Different types of bamboo are used to change the quality of the sound. Songo, or shallow-walled bamboo, gives a louder, more resonant sound than a regular deep-walled bamboo, but is less common due to its fragility.