Our ambition is to professionally record the Book of Psalms in Gregorian chant: each psalm in Latin (Nova Vulgata) with an authentic antiphon, preferably notated in the Codex Hartker or Hartker Antiphonary (Antiphonarii Hartkeri, Codex Sangallensis 390/391 dated ca. 990-1000) and the text of the antiphon taken from the psalm itself.

The Hartker Antiphonary encompasses all the office repertoire of the universal European and local Swiss tradition.