Data over sound.
Reliable this time.

Speaker → air → microphone. A TCP-style session with selective ACKs, sliding windows and automatic fallback — no network between peers.

• FAST & ROBUST audible modes
• Reed–Solomon + CRC-32 framing
• SYN · ACK · NACK · FIN over the air

⚠ Open-source edition: audible only, no encryption. Anyone in earshot can decode.