Turn any group of phones into one giant speaker. Nobody brought a Bluetooth speaker? No problem. SonicSwarm turns the phones already in everyone's pockets into one synchronized sound system. Host a swarm, have friends join, hit play — every connected phone plays the same audio at the exact same moment. Spread the devices around the room and the combined sound fills the space. No accounts. No sign-up. No cloud servers. Everything syncs directly between the phones on your Wi-Fi network. HOW IT…