I haven’t long to do Advent songs in Advent.
The article at Pray Tell listing an Advent playlist has this choir song from Steven C Warner, which is quite a performance in all its glory if you have the resources.
It interweaves “O Come O Come Emmanuel” into the choral parts masterfully.
The sheet music can be purchased at WLP where the text is in the sample sheet music.
BIAB will never do this justice so I just picked the main vocal lines with some of the extras. I suppose a choir could use it as a skeleton and sing along whatever parts they wanted.
This is what it is supposed to sound like: