D29 writes to say that he likes this version of the chant more than the one I posted.
It does have a substantially different feeling! Sometimes I wonder why the Church no longer celebrates in this manner. It does require substantial effort and training, but surely not much more than the choral and musical performances we do encounter. Beauty and truth and virtue all align. Why should we not, then, align our performances-meant-to-be-beautiful with the truth and virtue they mean to uphold?