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towerful

@ towerful @programming.dev

Posts
3
Comments
2081
Joined
3 yr. ago

  • Beyerdynamic (German headphone producer) bought by Chinese company

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  • 250ohm isn't louder.

    This is my understanding. Audiophiles love to shroud things in mystery. And it's been decades since I did reactive/imaginary electronics at university.Please someone correct me:

    80 ohm is fine from a phone or a laptop headphone jack. Basically everyday consumer not-special devices.80ohm can covert the small power output to a higher magnetic field, so the voice coil can move more (or with more force) which moves more air, which is louder.

    But to make 80 ohm coils, it requires a thicker wire in the voice coil (thicker wire lowers resistance. I know its impedance, but I feel like wire resistance is probably higher than the imaginary component). Which makes it heavier. Which makes it slower to change direction (heavier has higher intertia, so larger momentum once it's moving in one direction). So you get less definition (high frequency/fidelity/detail/whatever, basically).

    P = I²R : as resistance increases for a given power amp, the current has to drop. And magnetic field (which drives the voice coils) is related to the current.So for a given power amp, low impedance phones will generate more magnetic field.

    So a low impedance headphone can do more with less, at the expense of fidelity/high-frequency/detail.

    A higher impedance coil is made with thinner wire, so is lighter which reduces its intertia.But it requires more power to produce the same amount of magnetic field (which relates to the amount of air moved, which relates to loudness).

    I feel like the whole thing is a rule-of-thumb thing.

    Generally low impedance has heavier components which move slower, so can't do the higher frequency things.But they can move more air for a given power, just slower.

    High impedance things are lighter and can move quickly. But they require more power to produce the same amount of magnetic field.So they can move air faster for a give power, just less of it.

    So a high power headphone amp will be able to "drive" 250 ohm headphones.

    I have a FiiO k7 with my DT770 250 ohms.It's a dac, nice big volume knob, usb, DAC (spdif copper and glass), unbalanced inputs and unbalanced outs.My hatred (and I wish I knew this before buying) is that inserting headphones does not mute the analogue outputs. So plugging I. headphones doesn't mute my speakers.Other than that, I have no issues with it. Sure, I'd love a Benchmark. But my budget says FiiO is good enough, and my 770s sound lovely

  • Beyerdynamic (German headphone producer) bought by Chinese company

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  • Swap some new pads, maybe a new cable, maybe a driver.Still good.

    Physics doesn't change. Audio is still air moving.And quite frankly, we perfected that 40 years ago (well, give or take).

  • Beyerdynamic (German headphone producer) bought by Chinese company

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  • I hope the Chinese company isn't just buying the brand name, but actually buying the company.IE, will continue to do excellent beyerdynamic things.But I doubt it. I don't know if an audio company that got better after an acquisition. Cheaper, maybe. Better bamg-for-buck, yup. But actually better? Not that I can think of.

    As opposed to what Behringer/Music Tribe did to Midas: Midas made extremely well respected kit; Behringer buys them (except it was Music Group, now Music Tribe); midas stuff becomes shittier; behringer stuff becomes a little bit better.Sucks for anyone that bought a Pro series console. Pretty much a boat anchor after 5 years.

  • build walkable communities

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  • I presume US schools have to buy/rent busses and pay bus drivers? Specifically to drive kids to/from school?Instead of the council (or whatever) subsidising routes that connect new builds to schools, and giving under 16s free bus travel.

  • The incredible skill of a trained pilot

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  • This seems like a fantastic example of "if a metric becomes a target, it fails in being a metric".

  • My Girlfriends Husband...

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  • No, they apply to everyone except white republicans. Their abortions are obviously justified and ordained by God (or something).See, white right-wingers are the "in group" to to the white right wingers (the predominant people & people in power of the American republicans).Everyone else is sent by the devil, or taking jobs, or freeloading on benefits. So anything they do is wrong

  • Starmer says no [Scottish] independence referendum while he is prime minister

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  • Yeh, I'm a real person. And I live in Scotland. And I'm not Russian.So fuck off with that pish.

    I would also rather keep the Tories and reform out of power.But I also suffered many years of not voting Tory - and having a Scottish government that isn't Tory - and still had to put up with a Tory government.I voted against independence because I didn't want to leave the EU - something I felt the UK government had a guarantee on, but was very undefined with independence.

    And now that we have labour in the UK government, they are just Tory-lite.I get that they moved right in order to scoop up more votes, but they aren't going to return left.They are passing austerity laws. They are not standing up for trans and immigrant rights.I'm certain they are better than the Tories, and maybe they're just having a rocky start.Maybe I'm paying too much (or maybe not enough?) attention to the news, so I'm only catching the negatives.

    Reform aren't gonna get power in Scotland, Tories aren't gonna get power in Scotland.But it feels like Scotland is trying to do better and keeps on getting dragged down by the UK.

  • Scientists create 'world's smallest violin'

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  • Michelin Stars? Yeh, the tyre company recommending restaurants

  • I can't believe you would even suggest that.

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  • Ah, the old Lemmy switcheroo.Hold my gum, I'm going...Wait, do we have that here?

  • Starmer says no [Scottish] independence referendum while he is prime minister

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  • Having a once-on-a-lifetime holiday doesn't preclude you from having another holiday on the chance it's another once-in-a-lifetime holiday.

    And "opportunity" adds a whole bunch of context. Support was high for independence, a government was in power that was (and still is) popular and progressive, and the UK government agreed to respect the result. That, to me, is what "opportunity" means: the time is right.If there is another surge of support, another Scottish government is elected on the premise of independence and delivers such a crushing victory as the SNP did, then it's just down to the UK government denying the Scottish Government.

  • In North Korea, your phone secretly takes screenshots every 5 minutes for government surveillance

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  • Ah, lol.Is that the web interface? Or what app is that?

  • I was told any topic is good.

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  • Elon getting up mid interview and walking away would be spectacular. That's more damaging than "I don't want to answer that".

  • Am I weird for avoiding flying on prop planes, and only fly on jets?

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  • Autopilot crashes?You mean MCAS (Maneuvering Characteristics Augmentation System)?It's not autopilot. It's worse than that.

    Due to the larger engines needing to be mounted in a different place, the flight characteristics changed between previous gen 737s and the new 737 MAX.

    The characteristic change would mean it needs different certification from air authorities and existing 737 pilots would require recertification to be able to fly the new 737 MAX (which is supposed to be just an updated model).All very expensive for what should be merely an upgraded model.

    To avoid this, Boeing used software to change the characteristics in order to bring it inline with previous 737s and the existing certifications.And as it was just an augmentation system, it was deemed high risk but not critical risk. As such, it didn't require full redundancy, didn't require Quick Reference Handbook entries incase of issues/errors, and didn't require training.In fact, pilots had no idea it existed, what it could do or how it worked.

    Which means when it had an issue and caused extreme pitch down due to faulty sensor readings, the pilots had literally no idea what was happening as they were trying to stop the plane from accumulating pitch down every 5 seconds.

    And then Boeing tried to fuck with the narrative. I think they also didn't tell pilots about MCAS until after the Ethiopian Airlines crash (the 2nd caused by MCAS), but I'm not 100% sure on the timeline.

    Boeing has had a stream of QA issues, the way MCAS was handled was idiotic, they are a shitty company.

    But I have no issues flying in a Boeing.I don't like or trust the company, but I trust the air authorities. And most of all, I trust the pilots.

  • Proprietary vs Open Source Backdoors

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  • Yup.But in open source it CAN be noticed, by anyone determined enough to dig into its side effects.Proprietary software? You file a regression bug that startup takes 500ms longer, and it might get looked at.

    Also, backdoors that are discovered in open source software improve automated software auditing.

  • In North Korea, your phone secretly takes screenshots every 5 minutes for government surveillance

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  • https://www.bbc.co.uk/news/videos/cewd82p09l0o

    I think that's the link to the video?Seems like it's part of a longer video...

    Edit:Hhmmm here is a slightly longer video that doesn't really add anything

    Actual edit:I genuinely couldn't find a better source video

  • China calls BS on Trump’s ‘Mr. Nice Guy’ trade rant and vows ‘forceful’ retaliation

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  • “The United States has unilaterally and repeatedly provoked new economic and trade frictions, exacerbating uncertainty and instability in bilateral economic and trade relations,” the statement said. “Instead of reflecting on its own actions, the United States has groundlessly accused China of violating the consensus, a claim that grossly distorts the facts.”

    That is such a wonderfully diplomatic way of saying "stop being a fucking idiot, your words have meaning and these are the consequences. Grow up".Even just "grow up", tbh.

    As much as I dislike the amount of reliance the world has on China (for the labour conditions there, the nature of their government to impose dodgy practices, generally speaking not being a "good egg"), China seems like the only trading bloc (although not a bloc, I guess... Maybe "trading entity") that can unilaterally stand toe-to-toe with TACO and win. So, good on china.

  • "Stop sugar-coating it": Anthropic CEO says AI will slash 50% of entry-level white collar jobs — leaving Gen Z out of work

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  • Yeh. Unpaid internship instead of an apprenticeship.But an apprenticeship doesn't require a university degree to qualify for

  • "Stop sugar-coating it": Anthropic CEO says AI will slash 50% of entry-level white collar jobs — leaving Gen Z out of work

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  • Having been through university, I have no idea how I could "level up faster" without more years.And I say that as someone that has carved out a career doing something as the (AFAIK) only person (well, freelancer at least) doing what I do in my country.

    Maybe AI disrupts universities? Or AI disrupts skills?Like AirBnB disrupted hotels, then enshitified to make airbnbs require more manual labour to stay at and cost more than a fucking standard hotel room.

  • Prompt Engineer

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  •  
            let data = null
    do {
        const response = await openai.prompt(prompt)
        if (response.error !== null) continue;
        try {
            data = JSON.parse(response.text)
        } catch {
            data = null // just in case
        }
    } while (data === null)
    return data

    Meh, not my money

  • Prompt Engineer

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  • Edit: wrong comment