The txistu (Basque pronunciation: [ˈtʃis̺tu]) is a kind of fipple flute that became a symbol for the Basque folk revival. The name may stem from the general Basque word ziztu "to whistle" with palatalisation of the z (cf zalaparta > txalaparta). This three-hole pipe can be played with one hand, leaving the other one free to play a percussion instrument. The Association of Txistularies in the Basque Country was formed in 1927 to promote txistularis. The organization has continued its activities to the present, except for an interruption during the Francisco Franco dictatorship.