Everything is beautiful: the voices, instruments, mixing the two, the sound balance, the sound very clear! It could have been perfect if the tempos in the Mass Ave Regina Caelorum were not always too slow, often making the music a bit boring: it is particularly evident in the vocal duets! Dufay's music is rhythmic, syncopated, joyful, full of life: we have here an interpretation where all this tension is released by slow tempos.Ils try to replace it by introducing nuances, but in vain, and without arriving to be exciting! Too bad! But I put three stars anyway because of all the other qualities of this recording listed above!