Sung Mass
There are two types of sung Mass. Two servers can assist the Priest (as at Low Mass) without incense, but this time with music and chanting. The second version, is with the Priest assisted by a MC (Master of Ceremonies), a Thurifer and two Acolytes. The Priest chants the Asperges, Epistle, Gospel etc.
There was no Deacon to assist the Priest, so they had to have a sung Mass with Incense