Who sings at a funeral?

It depends on the church. the lively ( March of the Saints- on the way back from the cemetery- is New Orleans tradition- but in real life- more sombre airs are adopted. At the funeral of a family member in the church- it followed the pattern of a regular Mass and there were hymns- sung by the regular choir. the final hymn which included the blessing of the Coffin - holy water and such- was ( From Whom all Blessings Flow) with an air chime ( not a true carillon) in strategic spots. Very solemn, dignified atmosphere. One wonders, jocularily if this song ( not intended as a funerary air) mignt have been used in connection with Richard Nixon- from whom all Blessings Flow- get it. Besides the, err, turbulent waters!