Looks like some #AI people have reinvented the acoustically-coupled modem.https://www.youtube.com/watch?v=EtNagNezo8wTha...

Looks like some #AI people have reinvented the acoustically-coupled modem.https://www.youtube.com/watch?v=EtNagNezo8wThat signal rate is extremely low, though. Even the 2400-baud modem of my childhood ran circles around this protocol.Although to be fair it wasn't acoustically coupled like this one is. Signaling this way is much noisier and therefore slower.

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