The responsorial psalm is sung or recited by the psalmist or cantor at the ambo.
Hence the psalmist, or cantor of the Psalm, sings the Psalm verses at the ambo or another suitable place...
The Easter vigil?...From what?
None of these in the current missal."The priest makes a sign over the water" (without specifying what the 'sign' is)
"The priest makes a gesture" (without specifying)
"The priest makes the customary gestures" (without elaborating ... )
... an unspecified gesture (to the cantors to bring their singing to an end).
To participate in the discussions on Catholic church music, sign in or register as a forum member, The forum is a project of the Church Music Association of America.