🚀 An ultrasonic adventure!
summary
Builds a serverless link by encoding signaling into sound: uses WebRTC for peer connection and the Web Audio API (oscillator, analyzer, getUserMedia) to emit and detect ultrasound tones, maps SDP/ICE fields into frequency symbols and compresses them (custom dictionaries + base conversion). Early naive transfer takes ~10 minutes; after SDP pruning and encoding tweaks the offer/answer round trip drops to about one minute round-trip. Works intermittently—limited by laptop speakers/mics, browser data‑channel support and audible/ultrasonic hardware constraints.
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