The GRAMMY-nominated crystalline voices of Trio Mediaeval have captivated audiences since the group was founded in Oslo in 1997. The group’s fruitful relationship with the legendary ECM Records, collaborative spirit, and busy touring schedule have earned them worldwide renown. Their program features works from a long-lost 15th-century choir book known as the Old Hall manuscript. These motets and mass movements find their voices again after more than half a millennium of silence, transformed by the singing of Trio Mediaeval and Catalina Vicens on the organetto.