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OpenWebRX is a remote spectrum monitoring solution
with the following features:

    libcsdr based demodulators (AM/FM/SSB),
    filters with changeable bandwidth, BFO and PBS,
    waterfall display that can be shifted back in time,
    uses HTML5 features like WebSocket, Web Audio API.
»
https://github.com/simonyiszk/openwebrx

via http://lalleau.com.free.fr/index.php5?sGj_PA
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