Choral Choir,Choral (SATB) - Level 2 - Digital Download SKU: A0.1391209 By Traditional. By Traditional. Arranged by TONY TRIPP. Christian,Christmas,Classical. 1 pages. Tony Tripp Music #974739. Published by Tony Tripp Music (A0.1391209). This is my own arrangement of the traditional Catholic Hymn Angularis Fundamentum..