Alleluia Laudate deum omnes angeli eius

Interesting to have Bfa notated in the mode of Elami (which goes against for instance to what Master Mateus de Aranda taught). The modal diapente therefore never appears, nor does the diathesaron; the second below the finalis is a common exception that is not enough to characterize the mode as plagal (imperfect indistinct mode of Elami).