This fine work played on viols is as wonderful as when it is sung, I would say.
If you however want to sing with me, here is a pdf:
users.on.net/~algernon/aveverum-byrd/aveverum-byrd.pdf
ernst stolz viola da gamba etc
"Ave Verum" is considered by many to be William Byrd's finest work. It was first published in volume one of his Gradualia in 1605.
Lyrics
The verse itself is from a 14th century handwritten document from Reichenau, penned by an unknown author.
Paintings by: Albrecht Altdorfer