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xnxtoday at 12:40 PM1 replyview on HN

> a convoluted mess of audio frequency modulation

Like a modem


Replies

hootztoday at 1:05 PM

I guess lmao, but much more rudimentary, less reliable and with loads of issues, as it had to blast piercing sounds through a speaker and then capture those with a microphone. But it was pretty cool when it worked!

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