If listening and repeating is your preferred way* of learning Gregorian Chant, this webpage is a great resource:
https://gregorian-chant-hymns.com/hymns-2/
( * another way, more beneficial in the long term is to learn how to read Gregorian Chant with the Movable Do and solfege methods. You can start learning at this link )
Long Beach Chant 
This is wonderful Herve. Can we send out with the usual post for the announcement email?
Laura
Of course! Saturday or before as you wish…