Arvo Pärt composed Da Pacem Domine for a cappella four-part choir (or four soloists) in 2004/2006, in response to a commission from Jordi Savall for a concert in Barcelona based around the "Da Pacem Domine" theme. The basis of the work is a Gregorian antiphon of the 9th century. Now the work is available in a version of recorder quartet - SATB or a low version TBGbSb.
Score and parts
Universal Edition UE33704