Ambient Capture

A Resonant Coil winds sound into Light. Mob deaths within 8 blocks add 25 Light; mapped world sounds charge the nearest coil from a data-driven, reloadable table.

Note block (harp/bass)	8
Note block (bell)	12
Bell use	10
Anvil land	40
Explosion	40
Beacon activate	100
Thunder	2,000

Extend it with a datapack override of data/echoes/resonance_sources.json.