High Quality Content by WIKIPEDIA articles! Sacred Harp singing is a tradition of sacred choral music that took root in the Southern region of the United States. It is part of the larger tradition of shape note music.The name of the tradition comes from the title of the shape note book from which the music is sung, The Sacred Harp. This book exists today in various editions, discussed below. As can be seen, the shape for fa is a triangle, sol an oval, la a rectangle, and mi a diamond. The shapes and notes designate degrees of the scale, not particular pitches. Thus for a song in the key of C, fa designates C and F; for a song in G, fa designates G and C, and so on; hence it is called a moveable "do" system.