A new HF digital ARQ/QSO mode.
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Mar 16, 2026 - Rust
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soundcard-modem
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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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Jun 13, 2026 - Python
Highspeed Soundcard IP Modem that turns two PCs' soundcards into a point-to-point network link. It modulates IP packets onto audio with OFDM (DMT), bonds the left and right stereo channels into two parallel lanes, protects everything with Reed-Solomon FEC and an ARQ with fast retransmit.
python numpy ham-radio tcp-ip software-defined-radio hamradio ofdm qam dmt packet-radio qam-modulation qam-demodulation ofdm-modem audio-modem soundcard-modem ip-over-audio
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Jun 12, 2026 - Python
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