this post was submitted on 18 Dec 2023
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things that are mildlyinteresting

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None of the others in town have these, thought it was unusual enough to share

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[–] [email protected] 0 points 1 year ago (1 children)

Go actually read about MP3 compression before you continue misusing the term "lossy."

[–] [email protected] 1 points 1 year ago (1 children)

It's just going to be pulses of an 8khz signal. Why would an MP3 not encode this just fine?

[–] [email protected] 1 points 1 year ago (1 children)

Like I said before, the coincidence is what's remarkable.

[–] [email protected] 1 points 1 year ago

It’s a bit of a coincidence that the signal is in the audible range, for sure! I’m not too surprised that an MP3 can reproduce a digitally modulated sin wave in the audible spectrum, but I can see how it’s surprising to people that a sound card is basically a dinky low frequency SDR. Van Eck Phreaking is another good example of this kind of stuff. CRTs in particular produce very obvious emissions which match what’s being displayed.