Long before I arrived, my parish was accustomed to dimming the lights for the start of weekend Advent liturgies. It’s a custom I’ve felt disinclined to discontinue. Music for the introductory rites is always something for which people need no book. At entrance we use “My Soul In Stillness Waits” or “Wait for the Lord” (alternating years) with verses adapted from the Advent propers. And a Kyrie.
The reason I mention the lights is that their dimming really mutes the sound in the worship space, as if someone were throwing a blanket over the proceedings.
A number of people lament the “casual” ins and outs of Catholic Mass these days: too much talking. Ever try keeping people in the dark on that?