Church bells being ring to produce songs but changes specifically are precise ringing procedures that often involve complex math in their creation.
I'm with op it's super neat. Before I find out about it I never knew some church bells can stand on their heads bell mouth up and complete full rotations like so.
I find people who develop deep passions for things you never consider in daily life to be incredibly fascinating. This is especially true for things that others might find boring.
I always want to understand why they find so much pleasure in something others might consider mundane.