I happened across this today ("Propers of the Church Year Set to Tones", Gregorian Institute of Guam, found on the CMAA site) and thought I would share :-)

Armoniae nostrae suavissimum melos,
qui nostri pectoris modulamina nunc flatibus, nunc fidibus,
praeperis exerceri, praesta ut dum illa spiritali affectu concinimus,
perpetualibus choris inserti,
te cum sanctis omnibus conlaudemus.

“Thou Who art the loveliest melody of our choir,
Thou Who hast commanded that the songs of our hearts should be rendered now by wind instruments, now by strings;
grant that while we are singing with this spiritual desire, we may be admitted among the everlasting choirs
and praise Thee with all Thy saints.”