TWO CDs from the fabulous, professional, choir of Church of the Advent in Boston bring fine performances of early vocal works as directed by Edith Ho, director of music, and Mark Dwyer, assistant director and organist. Guillaume Dufay Missa Se la face ay pale; Missa Ecce ancilla Domini; Magnificat quinti toni Compact Disc ARSIS-118$15.98 Francisco Guerrero and Christóbal Morales Francisco Guerrero: Missa Simile est regnum cćlorum; Missa de la Batalla escoutez; Motets: Alma Redemptoris Mater; Ave Regina Cćlorum; Regina cćli Christóbal Morales: Motet Simile est regnum cćlorum Compact Disc ARSIS-113$15.98