Ivo Antognini - Alliance Music Publications, Inc. O Magnum Mysterium Cover. Shop and Buy O Magnum Mysterium sheet music. a cappella sheet music book by Ivo Antognini (1963-): Alliance Music Publications at Sheet Music Plus: The Swiss composer Antognini pays homage to Bach in this simple work for choir, cello, and keyboard. Conductor Notes: This elegant motet for two-part treble choir, Thousands of titles to choose from. Sacred and secular choal music, choral collections, choral octavos and more. Ivo Antognini. O magnum mysterium dedicated to. Morna Edmundson and Elektra Women's Choir - Vancouver - Canada. I. II. Cello. Piano. 6. I. II. Vc. Pno. rit. rit. Swiss composer Ivo Antognini has gained widespread recognition in recent years for his choral writing, and his setting of O magnum mysterium is a good examplewinner of the Freudig Singers 3rd Annual International Choral Composition Competition. Ivo Antognini. O Magnum Mysterium. Soprano. Alto. Tenor. Bass for. Dedicated to Coro Calicantus - Mario Fontana, conductor. O Magnum Mysterium. Two-part treble, cello and piano or organ. Ivo Antognini. Violoncello. I. II. Piano.