The Attacca Festival features invited Slovene children's and youth choirs, which are joined by a hosted choir from abroad. The festival presents a thematically rounded-up programme of repertoires primarily composed of works originating from after 1950, and at the closure of the festival, the choirs perform some joint musical pieces. The concerts take place at different locations in Maribor and the neighbouring regions, but the prime venue is currently the Vetrinje Mansion. The festival was launched in 2007 by Karmen Šilec, head and the artistic director of the Carmina Slovenica choir and production house.
The festival is an extension of the various Carmina Slovenica projects that include different choirs, music publishing, (musical) theatre productions and a diverse set of educational activities. The latter is the main starting point of the "Attacca" creed, which is organising international collaborations of youth choirs and engaging them in contemporary compositions. As such, Attacca (which also includes residencies, a concert cycle, summer camps, and other initiatives) is very close to the project "Songbridge", an international forum for collaborations of this type.
The festival has up until now hosted choirs from France (the A tre voci choir), the United States (the Piedmont Choirs and the Peninsula Women's Chorus), Bulgaria (Detska kitka), Australia, Malaysia, and South Africa. The choirs are sometimes joined by renowned Slovene musicians, such as Vasko Atanasovski and Janez Dovč.
Attacca takes its name from the musical "direction" telling a performer to go without pause to the next section.