I believe this is the
Missa pro defunctis per octo vocibus composed in 1675.
In that case I'm very glad there is a new recording of it - so glad that, to read more of your review, I subscribed to the Insider site (actually I've been thinking of it for quite a long time...).
I'm aware of another recording only, from the Tactus label
In my youth I was one of the octo vocum (1st bass) in a "a cappella" choir. We performed that Requiem even in St. Mark, in Venice...
