Critical melody http://omnigreg.at/wiki/doku.php?id=ant:1074 - single difficulty on the last alleluia on -le- : do-fa, re-fa and do-mi all exist. Kept Lc, like previous publication (Omnigreg lists "AMres" as a recent restitution). Differentia : 1F et 1D- exist in mss (1D- is predominant). Kept 1F from Sandhofe, but should be reviewed.