Katta Ashula (literally ‘big song’) is a type of traditional song that forms part of the identity of various peoples of the Ferghana Valley in Uzbekistan, which is also home to Tajiks, Uyghurs and Turks, and of some regions of Kyrgyzstan, Tajikistan and Kazakhstan. It covers a range of subjects, from love to philosophical and theological concepts of the universe and nature, while leaving some room for improvisation. Transmitted orally from master to pupil from one generation to another during a demanding apprenticeship, it is interpreted by a minimum of two and a maximum of five singers. It is incribed in the UNESCO Representative List of Humanity in 2009.