Possible Clues:

• Singers need a number of sheets to sing from
• Carol singers
• Carolers, e.g.
• Sounds like a couple of dozen sheets for the singers
• Chorus
• Singers found nothing in rich ornamentation
• Church gets nothing right - admission of one group within it?
• The sound of many sheets for them to sing from
• School concert participant
• Macho Irishman suppressing a source of harmony?