Even though it probably guess against the concept of it being as low tech and simple as possible, it's hard for me not to think of technical solutions! I'm imagining a WiFi AP you connect to at the event, which opens op a captive portal web page, which starts streaming the music. That way you can join even if you arrive late and miss the countdown.
A pineapple is a general term for something with tons of wireless cards stuffed into it, so named because some versions are studded with antenna spikes vaguely like a pineapple.
They are commonly used for pentesting, hacking, and Wi-Fi mapping.
