This setting is by the late Br Colin Smith. He was well known for his Mass Shalom, recently revised by Paul Mason.
My backing just gives the tones for the verses. You get a better idea from this excerpt.
Response
Today is born our Saviour,
Christ, our Saving Lord.
Verse 1
Sing a new song to the Lord.
O sing to the Lord; bless his name.
Verse 2
Proclaim his help day by day and his glory among the people,
And his wonders among all the nations.
Verse 3
Let the heavens rejoice and the earth be glad.
Let the land and all it bears rejoice.
Verse 4
For the Lord rules the world with justice,
And he judges the people with truth.
© Colin D Smith, 1990.