Estonian vocal ensemble Vox Clamantis and their leader Jaan-Eik Tulve have established themselves among the leading interpreters of Arvo Pärt's music over a quarter-century of close collaboration with the composer — a relationship that builds on the almost half a century long artistic partnership between Pärt and producer Manfred Eicher.

Of the ensemble's ECM New Series recording The Deer's Cry, the BBC Music Magazine wrote that "the level of artistry necessary to achieve the kind of living, breathing performance given here by Vox Clamantis is a rarity ... This grippingly authentic and superbly sung collection may now be the finest single-disc introduction to Pärt's music."

And I heard a voice, recorded in Haapsalu Cathedral, Estonia, and released as Arvo Pärt turns 90, shows that the rapport between choir and composer, rooted in a shared feeling for both ancient plainchant and contemporary music, continues to deepen.