Sol-37 field instrument / acoustic link

AirBits

A browser-to-browser modem for passing short messages and tiny files through nearby speakers and microphones.

Idle

Transmit

speaker output

Message

Choose any file

No file selected.

Choose from Sol-37

Loading site file index.

Symbol rateOutput volume

Ready—

microphone input

Start listening on the receiving phone first. Keep devices close and avoid clipping the sender.

Waiting for transmission0%

Received text

Decoder log

proof of concept

55 × 24preambleD3 91 A7 5Csync wordmanifestname, MIME type, size, chunksCRC-16per-frame integritySHA-256whole-file verification

Audio bandwidth is tiny. Text, contact cards, keys, tiny images, and configuration files are the sensible use cases.