Clergy/Liturgists, how to gently discourage jabbering during the prelude? Should we?

I'm in lay leadership in my congregation as well as part of the AV team. We have a very lively and friendly congregation, which is a polite to say we're talkers! Unfortunately people are usually still drifting in during the prelude and bringing their conversations with them. We've tried polite notes in the leaflet, but it doesn't seem to resonate, and I've even heard people say they like how friendly it makes the place seem.

My issue is (and maybe this is MY issue) that it's not exactly reverent, and there are some people who want to be quiet and pray. Plus it is kind of rude to the musician playing the prelude, to put it mildly. And there's no way for us to edit it out of the recording of the service. I know I am not the only one bothered by it, but I don't know if it's a majority or a hill worth dying on.

I wonder if part of the problem is that the prelude just kind of starts without fanfare, often quietly, and there's no demarcating moment that says the service is beginning. My thought, which I was going to bring up in leadership meeting, is suggesting a bell (not our tower bell, which you can't even hear over the din) but possibly the Sanctus bell, followed by the priest (or someone) reciting an introit of some sort before the prelude begins, to kind of set the a prayerful tone of listening and letting the music fans actually hear the prelude.

Thoughts?