UPC: 28948786862 Estonian vocal ensemble Vox Clamantis and their leader Jaan-Eik Tulve have established themselves among the leading interpreters of Arvo Part ' s music over a quarter-century of close collaboration with the composer - a relationship that builds on the almost half a decade-long artistic partnership between Part and producer Manfred Eicher. And I Heard a Voice was recorded in Haapsalu Cathedral, Estonia and is released as Arvo Part turns 90.