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https://en.wikipedia.org/wiki/Blinkenlights

Has some nice photos. More welcome!

And on the modern computer, there is:

Blinkenlights: PC Binary Emulating Visualizer

https://news.ycombinator.com/item?id=31473846

https://archive.ph/GgGeZ

I was always fascinated by stories from older professors about how they could hear when something had gone wrong with an algorithm, because the sound would be wrong.

In my case, I could hear when some Windows malware (its indexer, updates, etc.) was running, because the computer would make funny noises. These days, everything is so silent, and the LEDs are gone, I only notice from the lag!

I sometimes wish there were still sounds, and more besides (e.g. sounds for strange network packets, and so on).

You can do a lot "artificially"; I set it up so my computer makes a frog croak sound when the LLMs finish cooking, and I have a colored orb in my notification bar showing the packet loss.

Back around 1968, I did some work on an IBM 1130 (small-scale 16-bit computer, definitely not a minicomputer, as it filled most of a room). The disk drive was driven by a voice coil, and made an audible click as the head moved from one track to the next. I would do a Fortran compile, then walk to the other end of the building to the break room to get a coffee while the compiler was working. The disk made a distinctive sound when the compiler went to write the executable, and I would immediately walk back to the computer room to see the compilation results.

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