Izvika (, "clamor, cry out, shout"), or kajda (, from Turkish "melody"), glas (, Slavic "voice") or naglas (), arija (, from Italian "air"), are names for traditional biphonic and polyphonic folk singing in Serbia found in several styles, such as in the Zlatibor region in western Serbia where it is known as izvika, in Vlasotince in southeastern Serbia where it is known as izvikaÃÂki, and central Serbia where it is known as iz glasa. It is part of the traditional singing in heterophonic drone vocal form. It is sung in a duet or group, by both males and females. It is inscribed in the Cultural Heritage List of Serbia.
In the Zlatibor District in western Serbia, the tradition is found in villages in the municipalities of Arilje, Bajina Baà ¡ta, Ivanjica, KosjeriÃÂ, Nova Varoà ¡, Poà ¾ega, Priboj, Prijepolje, Uà ¾ice and ÃÂajetina. There are two styles in the Zlatibor region, the izvika or kajda, and the na bas ("on bass") or arija.
There are specific melodies to the singing depending on event, such as à ¾etelaÃÂke (agricultural), ÃÂobanske (shepherding), sijelske (social gathering), slavske (feast days), svadbarske (weddings), etc.
A kolo folk dance, sakajdo, traditionally accompanies the singing in the Zlatibor region.