Chirp Pong

The “Chirp Pong” project, introduced by Simon Willison, is a proof‑of‑concept that tests whether a multiplayer game can be built using only static HTML and the browser’s microphone API. The idea is simple: two users, each with their own phone, place the devices close together, and the game state is transmitted through sound pulses emitted by the speakers. These “chirps” are picked up by the other phone’s microphone, interpreted, and used to update the game in real time, enabling communication without an internet connection or external servers.

The experiment is driven by a prompt from Claude Opus 5.5 Extra, which outlines the creation of a Pong‑style game with graphical and gameplay variations, but with the twist of using audio as the data channel. The implementation shows that modern browsers can reliably process acoustic signals to keep the logic of a competitive game in sync.

This news is noteworthy because it demonstrates a low‑cost, creative alternative for developing interactive experiences, especially in environments with limited connectivity. It also opens the door to new ways of device interaction that could inspire offline educational, entertainment, or communication applications.

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