At the request of a friend with whom I often pray Vespers.
Sorry this is skeletal for now; I’ll add to it as time goes on.
Caveat:
this is not Gregorian Chant.
Introduction and Conclusion
Invitatory (Psalm 51⋅17)
Introduction (Psalm 70⋅2)
Conclusion
Canticle of the Wedding of the Lamb (based on Revelation 19⋅1-7)
Responsories
Octave of Easter (Psalm 117⋅24)
Magnificat