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Jemalloc Postmortem

https://jasone.github.io/2025/06/12/jemalloc-postmortem/
416•jasone•7h ago•109 comments

Frequent reauth doesn't make you more secure

https://tailscale.com/blog/frequent-reath-security
843•ingve•14h ago•371 comments

Rendering Crispy Text on the GPU

https://osor.io/text
183•ibobev•6h ago•56 comments

A receipt printer cured my procrastination

https://www.laurieherault.com/articles/a-thermal-receipt-printer-cured-my-procrastination
905•laurieherault•21h ago•472 comments

A Dark Adtech Empire Fed by Fake CAPTCHAs

https://krebsonsecurity.com/2025/06/inside-a-dark-adtech-empire-fed-by-fake-captchas/
151•todsacerdoti•11h ago•46 comments

iPhone 11 emulation done in QEMU

https://github.com/ChefKissInc/QEMUAppleSilicon
292•71bw•18h ago•25 comments

Slow and steady, this poem will win your heart

https://www.nytimes.com/interactive/2025/06/12/books/kay-ryan-turtle-poem.html
30•mrholme•4h ago•15 comments

Show HN: Tritium – The Legal IDE in Rust

https://tritium.legal/preview
195•piker•21h ago•114 comments

Three Algorithms for YSH Syntax Highlighting

https://github.com/oils-for-unix/oils.vim/blob/main/doc/algorithms.md
20•todsacerdoti•6h ago•8 comments

Show HN: McWig – A modal, Vim-like text editor written in Go

https://github.com/firstrow/mcwig
114•andrew_bbb•19h ago•12 comments

Urban Design and Adaptive Reuse in North Korea, Japan, and Singapore

https://www.governance.fyi/p/adaptive-reuse-across-asia-singapores
31•daveland•7h ago•5 comments

Maximizing Battery Storage Profits via High-Frequency Intraday Trading

https://arxiv.org/abs/2504.06932
242•doener•23h ago•227 comments

Worldwide power grid with glass insulated HVDC cables

https://omattos.com/2025/06/12/glass-hvdc-cables.html
86•londons_explore•13h ago•56 comments

Rust compiler performance

https://kobzol.github.io/rust/rustc/2025/06/09/why-doesnt-rust-care-more-about-compiler-performance.html
210•mellosouls•3d ago•164 comments

Why does my ripped CD have messed up track names? And why is one track missing?

https://www.akpain.net/blog/inside-a-cd/
129•surprisetalk•18h ago•118 comments

Show HN: Tool-Assisted Speedrunning the Boring Parts of Animal Crossing (GCN)

https://github.com/hunterirving/pico-crossing
101•hunterirving•19h ago•14 comments

Show HN: I wrote a BitTorrent Client from scratch

https://github.com/piyushgupta53/go-torrent-client
107•piyushgupta53•4h ago•34 comments

Show HN: GetHooky – a language-agnostic Git hook manager

https://ezpieco.github.io/GetHooky/
10•Ezpie•5h ago•2 comments

Chatterbox TTS

https://github.com/resemble-ai/chatterbox
612•pinter69•1d ago•181 comments

The curse of Toumaï: an ancient skull and a bitter feud over humanity's origins

https://www.theguardian.com/science/2025/may/27/the-curse-of-toumai-ancient-skull-disputed-femur-feud-humanity-origins
50•benbreen•11h ago•17 comments

Microsoft Office migration from Source Depot to Git

https://danielsada.tech/blog/carreer-part-7-how-office-moved-to-git-and-i-loved-devex/
327•dshacker•1d ago•255 comments

Solving LinkedIn Queens with SMT

https://buttondown.com/hillelwayne/archive/solving-linkedin-queens-with-smt/
109•azhenley•17h ago•35 comments

First thoughts on o3 pro

https://www.latent.space/p/o3-pro
150•aratahikaru5•2d ago•138 comments

Dancing brainwaves: How sound reshapes your brain networks in real time

https://www.sciencedaily.com/releases/2025/06/250602155001.htm
158•lentoutcry•4d ago•48 comments

Helion: A modern fast paced Doom FPS engine in C#

https://github.com/Helion-Engine/Helion
154•klaussilveira•2d ago•57 comments

Quantum Computation Lecture Notes (2022)

https://math.mit.edu/~shor/435-LN/
136•ibobev•4d ago•45 comments

Major sugar substitute found to impair brain blood vessel cell function

https://medicalxpress.com/news/2025-06-major-sugar-substitute-impair-brain.html
114•wglb•9h ago•76 comments

US-backed Israeli company's spyware used to target European journalists

https://apnews.com/article/spyware-italy-paragon-meloni-pegasus-f36dd32106f44398ee24001317ccf2bb
611•01-_-•17h ago•300 comments

Show HN: Spark, An advanced 3D Gaussian Splatting renderer for Three.js

https://sparkjs.dev/
362•dmarcos•1d ago•85 comments

Roundtable (YC S23) Is Hiring a President / CRO

https://www.ycombinator.com/companies/roundtable/jobs/wmPTI9F-president-cro-founding
1•timshell•12h ago
Open in hackernews

Dancing brainwaves: How sound reshapes your brain networks in real time

https://www.sciencedaily.com/releases/2025/06/250602155001.htm
158•lentoutcry•4d ago

Comments

PcChip•21h ago
Is this why i can focus on coding so much better when listening to psytrance/goa?
tomrod•21h ago
I do the same. It is strange how psytrance/goa helps as external noise to drown out other distractions and so focus can be rationed.
echelon_musk•21h ago
I've found a bit of caffeine and some Astral Projection ideal for this. Care to share any favorite artists?
sorcerer-mar•18h ago
Not an artist per se but the app Endel is this continuous generated music with different "scenarios" for... well... different scenarios. IMO the full continuity is a game changer for focus.
edvald•20h ago
I can recommend dub techno for coding, works a treat for me at least. Nice and steady, relatively fast tempo but not too aggressive or intrusive. And crucially, no lyrics, which I find distracting when coding or writing.
bradly•19h ago
Yes. The paper found 2.4 Hz frequencies to be the secret sauce which is 144 BPM and in pystrance/goa range. I would guess that is common freq range for lfos and modulations as well.
parpfish•19h ago
I’ve always thought it was funny how the two situations for listening to edm were so different:

- alone doing intensely focused work

- in a huge crowd dancing and definitely NOT doing work

robviren•21h ago
I do still actively wonder what portion of the effects are real vs placebo in audio "treatments". I'm not certain I am sold on things like binaural beats and such, but I do believe that pleasing music that relaxes the brain for a person can be real. It's just highly person dependent. One persons calming effect with hard rock is another person's anxiety source. Would be incredible if it allowed for better understanding of this.
agumonkey•21h ago
I was regularly surprised how music could restore 'colors' in my emotions even in the darkest times. Quite mind-blowing that something that looks completely abstract and removed from evolutionary advantage could have so much impact.
skeledrew•17h ago
Binaural beats usage has worked pretty well for me in the past. Maybe think of it as the most pure form music (from a functional perspective) can take.

https://news.ycombinator.com/item?id=44258339

kator•21h ago
A little better link here with a link to the detailed article, too.

https://health.au.dk/en/display/artikel/dansende-hjerneboelg...

Meanwhile, it's interesting that I do find I can focus deeper on code with certain types of music. I also have certain music I listen to when I want to write a document, such as a PRFAQ or some narrative. I've always assumed I was just "programming" myself for these modes, and the music was reminding me of the mode I was in. Perhaps it's a little of both.

swayvil•19h ago
Assuming that we don't perceive "real reality" but rather a complex model of it, they say what we call sound comes closest to real reality.
pizzafeelsright•18h ago
Assuming everything is energy then the sensor picks up on different attributes of the signal. Reality is the signal, the scatter is noise, the parts with order (music) are the message.
canadiantim•18h ago
While we don't perceive "real reality" either with our senses or abstractions from them, and likewise often are just perceiving complex abstract models of reality, I think we also do have the ability to experience (but not perceive) reality directly. To your point though, I do think sound is closer to an experience than a perception and therefore more real and less abstract.
skeledrew•17h ago
We're very literally unable to perceive "real reality" per se. All we can ever perceive are the effects that reality has on our senses, along with any "side-effects" caused by the differences in one person's sensory system compared to another (personalized complex model).
quantadev•18h ago
This is also direct evidence that qualia/consciousness is made of waves, not computations. The Neural Net "wiring" of the human brain is mostly I/O signal routing for various sensory input data and motor neuron output. The convolutions and special 3D shapes in the brain are actually working more like "resonator" circuits (literally like radios), and I'm convinced even memory is not stored "locally" but spread out across all past brains via entanglement and quantum waves (see. "Block Universe" and/or "Eternalism").

This viewpoint means when you remember something from the past that's actually a quantum wave effect where your current brain automatically "finds" and gets energy from the closest matching prior state. This would be like a opera singer singing a pitch to find a hidden wine glass that will resonate at that frequency. This lookup/retrieval mechanism requires no wires or direct contact, but only waves. However I think qualia is built of 'probability waves' and that's how they manage to travel faster than light to go out and find "matching memories", because probability waves are not "real" (no mass) and therefore not subject to the speed of light limitations.

skeledrew•18h ago
Did this reconfig-by-sound a lot in college using binaural beats. While others use coffee and other chemicals I'd just pop in my earphones and play a beat sequence for whatever the needed purpose, whether extreme focus, a power nap, enhanced creativity, etc. Worked pretty well, though I'd feel nuked for a while after extended usage.
EGreg•18h ago
How exactly did you feel afterwards? Could you list the different beat patterns (or link to an example) and the result?

Especially power nap lol

skeledrew•18h ago
It's a bit hard to describe: a kind of extremely worn out and braindead feeling. But that's usually after using it for several hours on end. The brain just isn't designed to be forced into a particular state for extended periods I guess.

My goto was the Gnaural app[0], but it's been a dead project for some time. Still have the app on my phone though, in case I want to do quick dives. There are other implementations and also audio files out there, but I never found anything as good for my use case.

[0] https://gnaural.sourceforge.net/

Obscurity4340•16h ago
BrainWave advance binaural programs is probably very similar, has different tracks implying the desired effect. Some of them definitely help with what they arr supposed to, morning coffee and deep relaxation are consistent with their naming
Obscurity4340•13h ago
https://www.banzailabs.com/binaural-brainwave-entrainment-ap...

Websites a bit old skool but its legit

quantadev•12h ago
There's a specific frequency of brain waves which are always correlated with wakeful consciousness. I never looked up whether 'binaural' stuff is normal in that same freq range or the lower ranges. The lower freq ranges are still present even during unconsciousness (or anesthesia), and so focusing the brain on those frequencies would either 1) help concentration or 2) help sleep? I'm not sure which.
chrisweekly•18h ago
Related tangent - here's my carefully-curated "flowstate" Spotify playlist consisting of tracks w/ no lyrics and a variety of moods. I pick one that suits me in the moment and put it on repeat. I find it boosts my focus and energy and is very helpful in attaining flowstate, for problem-solving or Cal Newport-style "deep work" sessions.

https://open.spotify.com/playlist/6UScdOAlqXqWTOmXFgQhFA?si=...

kranner•7h ago
I've always thought of songs with human vocals as cries of conspecifics, impossible to ignore and thus highly distracting.
bluechair•18h ago
I don’t know about others but I felt like this article is so high level that it didn’t explain anything at all.

Here’s a link to the paper:

https://advanced.onlinelibrary.wiley.com/doi/full/10.1002/ad...

erikerikson•17h ago
Also here if you don't like Wiley:

https://pubmed.ncbi.nlm.nih.gov/40211612/

shironandonon_•16h ago
this site that has been previously posted on HN works well:

https://musicforprogramming.net/

Otherwise agree with psytrance / goa mixes. Techno can be good too if you are tired (eg: Sara Landry, 999999999). Trance can help to uplift if you are depressed. Classical to make you feel more ordered.. I love dubstep in my brain but it creates patterns that are counter-intuitive to doing any work — that genre makes me feel “free”.

benchly•43m ago
Thanks for sharing, I've not seen that site before and this is very much in-line with my own discovery about using music to help with my anxiety. The About blurb really sums it up. Wild, because had anyone presented such claims to me 20 years ago, I would have waved them away as bullpucky peddlers. Now, DnB + other electronic genres are dosed daily while at work through my headphones and I'm better for it.

Interesting that dubstep makes you feel free! I would not describe my experience like that, but it does tend to raise my aggression a bit, so I usually avoid it unless its crunch time. Your comment has me wondering about different experiences than mine. My DnB picks are more soothing to me, but sound too chaotic and "all over the place" for my wife's ADHD.

_DeadFred_•15h ago
"Music is a delight for the soul, an echo of the divine, binding time together—past, present, and future."

-- St. Augustine

Music makes your brain work in an interesting way, keeping track of this memory/current flow/anticipation of time in a non-visual and often non-verbal way.

rubicon33•15h ago
Sounds cliche, silly, etc. but music really is magic. Such an abstract thing that can produce wide ranges of emotions and even help focus and inspire.

I find a lot of electronic music helpful for coding.

Some bangers for anyone interested:

Age Of Love - The Age Of Love (Charlotte de Witte & Enrico Sangiuliano Remix) https://www.youtube.com/watch?v=0YVvcTIGy40

Nero - My Eyes https://www.youtube.com/watch?v=XiojdDs8wwk

SUB FOCUS x WILKINSON @ Corfe Castle, Dorset https://youtu.be/TRh-amAhOEw?si=jCx1V7jkciB3h4kh

Adventure Club - Gold (Ft. Yuna) https://youtu.be/09wdQP1FFR0?si=r7hfA6w3qfhXzL30

orbit7•10h ago
I agree music is very useful for switching things up a gear, from down tempo through to very high bpm such as: https://open.spotify.com/album/3f8egS9LhMlx6S3YqJdl3z?si=Fo1...
melvinroest•3h ago
DnB is my jam, I’m a fan of sub focus and wilkinson.

Here is 37 hours of DnB [1]. Here is 30 hours of mostly house [2].

[1] https://open.spotify.com/playlist/6a14gkr30nOOr8Eu9T34tE?si=...

[2] https://open.spotify.com/playlist/3BUgKCDAWvcDa28MVToIFM?si=...

specproc•1h ago
Big up the DnB crew. I like it dirtier when out, but love a bit of liquid to code to.

For sessions:

Big Bud: Infinity + Infinity https://www.youtube.com/watch?v=tYEuCcMZB_o

LTJ Bukem: Logical Progressions https://www.youtube.com/watch?v=ZZK_0dgj43s https://www.youtube.com/watch?v=iYqDVqYSTxs

And a few select cuts:

Calibre & High Contrast: Mr Majestic https://www.youtube.com/watch?v=Nswe73umPQk

Hybrid Minds / Daughter: Youth https://www.youtube.com/watch?v=8RUWkv4Ray8

Hybrid Minds: Touch https://www.youtube.com/watch?v=4AKSpPkZAuE

benchly•55m ago
These replies are fantastic, thanks all.

I recently (last few years) discovered that not only do I like DnB, but there is something about it that keeps the anxiety goblin in my brain occupied the same way one might distract an unruly child with a video game or something equally engaging. Contrast to what the poo-poo'ers say, the organized chaos that it brings to my table actually _helps_ me regain a bit of my higher-order thinking, especially when troubleshooting.

Calibre is a fav, but already mentioned so I offer up another favorite of mine for those looking for something a bit more fluid with a nostalgia kick.

Level Select by Pizza Hotline: https://pizzahotline.bandcamp.com/album/level-select

replete•59m ago
Yoink!

Liquid DnB is my goto flow state hack:

18 hours spotify playlist of my faves: https://open.spotify.com/playlist/2GKgNjMOLu9GYy1puVknIJ?si=...

Only thing to be aware of is that Spotify's shuffle is not a true shuffle, it's a shuffle designed to earn them the most money so you might have noticed the same tracks repeat themselves in a massive playlist, others don't play at all. Unfortunately the solution is to use on of those spotify API websites to dupe the playlist with a shuffle and play it in a shuffled order.

some1else•14h ago
There's very little in the article about "how" sound reshapes "networks" in the brain. It's pretty reasonable to expect that hearing different sounds can cause different neurons to fire, though (considering you can upload information into somebody's brain by talking to them).
quantadev•12h ago
The important discovery is not that sensory experiences correlate strongly with specific areas of the brain. That's been known for decades. What I think is possibly new here is that the musical waves are genuinely getting "in sync" (temporally). Neuron firing is too slow for this to happen due to the normal conventional interpretation of how the brain works, which is that info travels from synapse to synapse. It essentially disproves the "calculational" (synapse based) model of consciousness, and it proves that even qualia itself is based on waves.

Sure it's possible that something akin to simple harmonic oscillator spontaneous synchronization could be happening (i.e. this: https://www.youtube.com/shorts/RYeNu159Sgc) but even if this 'dumb' sync is playing a role it still isn't evidence against the wave-based nature of qualia.

b0a04gl•14h ago
honestly every time i see .htm i double check twice thinking it's a typo then realize no, it's actually .htm and weirdly comforting. means someone out there kept the old publishing flow alive. feels more handcrafted, less processed not trying to chase trends, just pushing pages the same quiet way for years there’s something solid about that kind of consistency
mihaaly•10h ago
There are combination of frequencies, tempo, volume, shortly specific music that acts as psychotropic agent on me, altering the way my mind works for the duration of the song. I am the type laughing at trance and meditation and other hyped-in-certain-circles blabla, but what I feel then may be something related.

  "Music is to me proof of the existence of god
  It is so extraordinarily full of magic
  And, and in tough times of my life
  I can listen to music and it makes such a difference"
  - 1 Giant Leap - Daphne
pedalpete•10h ago
I work in neurotech with auditory stimulation, so you'd think I'd be a big fan of this area of research, and I think the authors have done a decent job of suggesting the limitations, but the title itself gets picked up and people read a lot into what they think this is saying. Or maybe I'm just a bit jaded.

They provide a 2.4 Hz stimulus and then measure frequency-matched activity across brain networks. They suggest some novel methods of measuring how the signal traverses the brain, but they don't suggest why it does, which is good. They do say this is unlikely to be entrainment, I'll get into that more in a bit.

We shouldn't be surprised that auditory stimulation produces frequency-matched activity across distributed brain regions. The auditory system naturally routes information across multiple interconnected networks. The auditory system picks it up, but the auditory system is also not siloed into a single area of the brain. No brain systems are, we have replication, and this is just showing the the nervous system is passing the signal throughout the brain. In no way does it suggest that this is related to thought, consciousness, focus, or that these frequency-matched responses reflect any functional change in brain state.

When people talk about entrainment, that is a real thing. But the word itself describes when systems synchronize, not that they will.

I guess I'm cautious about papers like these because of our work in neurostimulation and sleep where we use phase-targeted auditory stimulation to enhance slow-wave activity. Basically increasing sleep's restorative function.

In our work it isn't this sort of "gentle tones to help you sleep", or "activating networks to alter brain activity", which is an area I see a lot of snake-oil and nonsense.

The way closed-loop phase-targeted slow-wave enhancement works is by "interrupting" the brain during the synchronous firing of neurons, which (it is believed) triggers a protective mechanism in the brain and as a response, the brain increases the synchronous firing of neurons. We're talking about very short (50ms) interruptions.

I get my back up a bit when I hear about this idea that reading electrical activity of the brain and making broad assumptions about what they "mean". I've been invited to speak on a panel July 2nd with Australia's Commissioner of Human Rights to discuss ethical safety around EEG data, and while I do believe we need to protect bio-data, I don't believe in the "electrical activity means we can read or alter your thoughts" camp.

If you want to know more about our work, you can check out https://affectablesleep.com, and if you're in Sydney, and want to come to the talk, I can't find a link atm, but it's at the Sydney Knowledge Hub on July 2nd., part of the Sydney Neurotech Meetup

southernplaces7•7h ago
A while back someone on this site posted a link to a music channel that fused the sound of an SFPD police dispatcher with an ecclectic mix of low-key electronic type music. Can't find it since but really liked it. Anyone here know what i'm describing?
thenthenthen•4h ago
Should be this: https://youarelistening.to/
southernplaces7•2h ago
No actually. I remember that it was a green/black sort of site color scheme, but no worries, thanks for this. It's pretty damn good!
hmm37•31m ago
Are you talking about soma.fm?

https://somafm.com/sf1033/

ews•31m ago
mpv https://somafm.com/sf1033.pls on the cli will make that work
tylervigen•6h ago
This article’s title, subtitle, summary, and first two paragraphs all contain some version of the phrase “reshapes your brains internal networks in real time.” I thought I was going crazy after I read the same thing six times.
Lu2025•6h ago
This is why I use Instagram on silent. I don't want them to influence me too much.
Noelia-•5m ago
I’ve always felt that certain sounds or music really affect how focused I am. Background noise from a café, for example, actually helps me concentrate and makes writing feel easier.

It’s kind of amazing when you think about it. Makes me want to experiment more and see if sound can actually “tune” the brain to boost focus or improve mood.