(WIP) Fully playable, open source recreation of every Rhythm Heaven minigame with a built in level editor. Gregorian Chant Academy, Coeur d'Alene, Idaho. 120 likes · 2 talking about this. Inspiring and helping you to sing Gregorian Chant with understanding... Jump to. Sections of this page. ... The Nature of Rhythm as explained by Plato, St Augustine, and Doms Mocquereau and Gajard. N.B. I do not condone the Solesmes Method, but neither do I.