A online demo is available at pasteburn.onrender.com. Note that the demo is very unstable and should not be used for purposes other than demonstration. Paste something into pasteburn with a password.
The FSK demodulator at the core of this application expects the transmitter to behave like a modem. That is, it should: Have a symbol rate which is close to the desired symbol rate (within +/- 1000 ...
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