Near the end of the post that opens this thread, I mentioned that a few minutes of actors' adaptation could be heard as a video soundtrack, but I could not make a clickable link to it.

So here is a non-clickable link.

https://www.youtube.com/watch?v=bIMOpVMSkNQ

Besides the plainchant of the monks in the background, the voices are:
Robert Carlyle, as Brother Claret
Michael MacKenzie, as Dom Paolo (father Abbot)

The few audible minutes come at the beginning of "Fiat Lux", the second section of "A Canticle for Leibowitz."

that code might be v=blMOpVMSkNQ, not sure....