How do they know when to stand and sing at the beginning of mass? When the organ finishes the voluntary and any necessary improvising and smoothly goes into the hymn introduction - they spontaneously stand and sing.
...compulsion to ask...
I don't understand the American Roman Catholic compulsion to ask everyone to "Stand and greet [the celebrant / each other] as we sing our [opening hymn / gathering song / processional ditty], number six hundred and sixty six, in the BLUE HYMNAL, Silence, Frenzied Unclean Spirit, number SIX SIX SIX in the (hold it aloft) BLUE HYMNAL."
...is there a greater expectation...
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