AISCGre – International Society for the Study of Gregorian Chant
Cantus Posterius – Lifelong learning project
Graces & Voices – Graz
Vocalia Consort – Roma
Schola Resupina – Wien
Grazer Choralschola
Schola Maastricht
Oslo Domkirke – Oslo Domkor – Oslo Domkirkes guttekor – Oslo Domkirkes ungdomskor
