The Offertory is equally wonderful, and so here is a recording of that. The sound quality is better, but I think the percussive effect on the repeated neumes is overdone. Nonetheless, a glorious piece of chant.
Of course in these enlightened days, we don't have Sundays after the Epiphany any more (who needs reminding of the Epiphany of Our Lord?) any more than we have Sundays after Pentecost (who needs reminding of the Holy Ghost?); instead everything is Ordinary Time (because your Ordinary is clearly far more important...)