''Bosnian roots music'' came from Middle Bosnia, Posavina, the Drina valley and Kalesija. It is usually performed by singers with two violinists and a šargija player. These bands first appeared around World War I and became popular in the 1960s. This is the third oldest music after the Sevdalinka and ilahija. Self-taught people, mostly in two or three members of the different choices of old instruments, mostly in the violin, sacking, saz, drums, flutes (zurle) or wooden flute, as others have already called, the original performers of Bosnian music that can not be written notes, transmitted by ear from generation to generation, family is usually hereditary. It is thought to be brought from Persia-Kalesi tribe that settled in the area of the present Sprečanski valleys and hence probably the name Kalesija. In this part of Bosnia it is the most common. This kind of music was enjoyed by all three peoples in Bosnia, Bosniaks, Serbs and Croats, and it contributed a lot to reconcile people socializing, entertainment and other organizations through festivals. In Kalesija, it is maintained each year with the Original Bosnian Festival music.