The first time he noticed it, it wasn’t even music. It's the FEELING. Checked the system readout out of habit, 40Hz. Sub-bass territory. The kind you don’t really hear… you become. Inside, the lights hadn’t peaked yet. No big drops, no hands in the air. Just a slow build. People scattered across the floor, drinks half-finished, conversations drifting. But the ones who felt it were already different. Their posture changed. Their movements softened, synced, not to the melody, but to that deep, pulsing undercurrent.