Perpetuum Jazzile is a Slovenian choir that performs jazz and popular music. It was founded as Gaudeamus Chamber Choir in 1983 by Marko Tiran. In 2001, Tiran passed the art directorship of the choir to Tomaz Kozlevcar, the renowned music producer, arranger and vocalist, who was followed by Peder Karlsson ten years later.\r \r The choir consists of both female and male singers. They are occasionally augmented by jazz instrumentalists from the RTV Slovenia Big Band and Slovenian pop stars such as Alenka Godec, 6Pack Cukur, Alya, Oto Pestner, Jan Plestenjak, Nusa Derenda and others.