Transmit and receive mechanical-television-style video through audio over a cable, WAV file, or pure software loopback. Classic 32-line club NBTV, and experimental wideband modes up to 480 lines that turn a 24-bit/192 kHz sound card into a surprisingly capable video link. It can even send *files* over the video channel as a stream of QR frames.
qr-code ham-radio file-transfer qrcode-scanner qrcode-generator software-defined-radio hamradio ham-radio-software nbtv soundcard-modem narrowband-television
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Updated
Jun 13, 2026 - Python