Throughout Infelix ego
, a six-part motet scored for AATTBB, runs a cantus firmus motif of eight notes, one for each of the syllables of ‘Miserere mei, Deus’, which is quoted in the second alto part. As the music progresses the note-lengths of this cantus firmus are halved until, at the very end, all the voices take it up. By such a simple method Rore was able to lead this enormous work to a point of resolution while underlining the mood of insistence inherent in the ‘Miserere’ plea.
from notes by Peter Phillips © 1994