Here are recordings of some of the chants you may be singing on Sunday:
Hosanna filio David
http://gregorian-chant-hymns.com/hymns-2/hosanna-filio.html
Pueri Hebraeorum
http://gregorian-chant-hymns.com/hymns-2/pueri-hebraeorum.html
Gloria laus
http://gregorian-chant-hymns.com/hymns-2/gloria-laus.html
Ingrediente
http://www.ccwatershed.org/media/pdfs/15/03/29/04-09-14_0.pdf
http://www.ccwatershed.org/media/audio/12/03/30/13-12-17_0.mp3
Propers
http://www.ccwatershed.org/
Plus Mass XVII, Credo I, Audi benigne conditor and an undergraduate musician in the parish has rehearsed and will conduct Byrd's Ave verum for Communion.
One of the things I enjoyed about the LMS Facebook posts on Passion Sunday is being reminded that those of us engaged in the weekly production of music for the traditional liturgy, are of course all united in singing the same music up and down the land.