Open-source numbers-station project for research, education and study: customizable number dictionaries, live minimodem FSK chat/files, microphone RX, speaker TX and audio calibration on Linux/macOS.
macos linux chat education research sdl2 ham-radio amateur-radio calibration file-transfer digital-signal-processing fsk ita2 baudot number-station numbers-station minimodem audio-modem emergency-communications offline-communication
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Updated
Sep 13, 2026 - Python