this post was submitted on 29 Dec 2023
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I've scrolled past this meme countless times, but somehow I didn't think of this before now: What does an composite video signal sound like?Anyone have the hardware to test it out and record the sound for me?
I've opened serial terminals to serial mice, and I've abused /dev/dsp with random binaries I've fancied at the moment, but it never dawned on me to plug the red or white RCA jack into the yellow port in the mame of science, and now I only have audio RCA..
EDIT: Composite video, not s-video
S-video was a mini DIN connector which wouldn't have fit into one of these RCA jacks.
If you'd put composite video (the yellow RCA cable in this setup) into one of the audio jacks, pretty much all TVs would not do anything with it as an incompatible signal. If they actually tried to turn it into something, it wouldn't be audible. Composite video generates a signal at something like 5-10Mhz, human hearing tops out around 20Khz (250-500x lower)
Just need to overclock the human auditory senses, duh
You clearly haven't seen my on Caffeine
Oh God, why did you capitalize that? Why is it capitalized???
I'm afraid
You can always drag out the signal to frequency shift it or something similar. It's done all the time in astronomy as an example to create visualizations.
Waveform example here;
https://www.ques10.com/p/26463/sketch-composite-video-signal-waveform-for-at-leas/
http://wla.berkeley.edu/~cs150/sp99/sp99/project/compvideo.htm
I guess it depends how much of a frequency shift you do, but I imagine with the blanking intervals it will mostly just sound like a nasty sawtooth wave?
In the worse quality TV, putting the composite video into an audio line would make the speakers do a short distorted buzz, then cutoff. The higher quality TVs won't even flinch. Their internal processing was fast enough to detect the wrong thing was connected, that the signal modulation never even made it to the amplifier. But to our ears it was probably just a bunch of electronic farts.
If I remember correctly it does not make ant sound. Another commenter says its due to advanced audio processing.
I do t m ow what it sounds da like but i know what it looks like. It’s basically modulating for every line of your TV high is bright and low is black with a marker for each line.
I can't comment on how it sounds but I can recommend video feedback synthesis!