Formed in 1996, ensemble VOX CLAMANTIS comprises a diversity of musicians – singers, composers, instrumentalists, and conductors – who have a common interest in Gregorian chant. Alongside Gregorian chant, considered to be the foundation of all European music, Vox Clamantis often performs early polyphony and contemporary music. Many Estonian composers, among them Arvo Pärt, Helena Tulve, Erkki-Sven Tüür, Tõnis Kaumann, and Sven Grünberg, have written compositions for Vox Clamantis.