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Joined 9 months ago
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Cake day: March 26th, 2025

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  • I know you’re playing devil’s advocate, but to play devil:

    In a theoretical world where you can manage to perfectly beamform the entire 20-20k Hz frequency range into a single node (or pair of nodes around the ears)… you’re still just re-condensing the original reference signal at the site of your beam target.

    And if your idea of peak quality is to hear the reference signal loud and clear, it might be marginally easier to set up some well-tuned speakers in an arrangement relatively free of resonance hotspots and then crank up the volume.

    So, how do you “crank up the volume” for that? Glad you asked; simple really: we need to apply a gain filter. To do this, we set up an array of batteries, and then connect only the positive side of the batteries to our audio cable. Positive electricity is bigger than negative electricity, so adding positive electricity to the cable means the speaker sound gets bigger.

    In short, all you need to match the quality of a hi-fi beamforming speaker system can be replaced with a few 9V batteries connected to your tuner with a paperclip. Thanks for coming to my audio engineering TED talk.




  • In high school, we used to play a game colloquially called Spoons/Assassins/Spoon Assassin/Marker tag. Long story short, everyone playing gets assigned another player as a target. You tag your target on the back of the neck with a spoon or marker to “kill” them + take over their assignment. Rinse and repeat until only the winner is standing.

    Major catch here is that for the game to work properly, the targets have to be chained in a loop, so there usually has to be a trusted individual running the game who can validate the assignment list.

    So I scraped the online school directory to pull names, emails, and school photos of everyone. Then I built a Java Swing app to track a list of who was playing, and the app would shuffle a random list and email everyone their assignments blindly, photos included. Flash forward a few months, and eventually we had a full roster of ~80 people playing across grades, which was ~10% of the student body.

    Unfortunately, a group of freshmen started their own take on the game, which devolved into mauling one another with Crayola markers and Sharpies. The principal catches word that I’ve been running a ring, and brings me into his office to tell me to shut it down.

    Uncharacteristically for my teenage years, I went all-in on diplomacy. I plead my case, tell him I’m not involved with the freshmen, hear out his concerns, volunteer to modify the game rules, and point out that our group been playing for months without issues. No dice; the dude was a jackass with a chip on his shoulder. So we come to an impasse, staring at one another in silence.

    Eventually, to break the silence, he asks about a stray bandage I have sticking out the top of my shirt. I’d had a small melanoma removed from my collarbone that week, which was caught as early as possible and removed without issue. Seizing the opportunity, I tell the principal “I have cancer”, and immediately walk out before he could formulate a response. Poor dude went white as a sheet. Good times.

    Bit of a lame ending for the app, but building it taught me the skills I used to jump-start my career, and drove home the point that software isn’t an end unto itself — it’s the way people use it to come together that makes things great.


  • Best General-ed goes to A History of the Popes by O’Malley. It’s a great throughline that touches on a massive swath of western history and adds depth to common narratives of the church. (You can probably skip it though if you’re the type who already has strong opinions on the Council of Calcedon or papal investiture.)

    Best Prose goes to The Power Broker by Caro. Too much ink spilled on that one for me to do it justice, but suffice it to say it’s a widely-cited nominee for greatest all-time nonfiction works.

    Best Insight goes to Hamalainen’s Comanche Empire. I don’t have enough praise for this one: It’s the story of the Comanches from ~1600-1900, but has wider insights that tie into empire and culture on a global level. Highly recommend as a paired reading with McCarthy’s Blood Meridian.





  • Great answer on the whole, but worth noting that both Git’s standard CLI client and most hosted git services do run periodic GC to prune dangling commits.

    I second the suggestion to take periodic snapshots of your mirror. Because the majority of file contents will not be changing over time, you can make these snapshots very disk-space efficient by taking binary diffs of the tar’d repo using rdiff or the like.