Complex sentence: León de Castillo was born in Mérida, Yucatán, Mexico, as a son of a Mexican mother and an Austrian father whose family came from a musical tradition of various generations as Vienna Boys' Choir, conductors (Kapellmeister), organists, and choirs.
Split into simpler sentences: León de Castillo was born in Mérida, Yucatán, Mexico, the son of a Mexican mother and an Austrian father. Several generations of his father's family were involved in music such as: the Vienna Boys' Choir, and as conductors (Kapellmeister), organists, and choirs.