This is a Michael Joncas song for Advent that is new to me. He based it on Isaiah 40. It has the same tune for verses 1,3 &5 with a different tune for verses 2 & 4. That might make a cantor a good idea, or better yet a choir doing the harmonies.
Cantus Mundi has the text and a few You-Tube clips. The sheet music can be purchased for download at OCP.
My backing is a gypsy waltz.
This is the original with its medieval fayre arrangement:
This version starts slowly but should have picked up speed at some point:
I like the enthusiasm here: