erdewit

6 ms·

1.
by erdewit 4y ago
Isn't this what's used for military applications like AESA radars? If so how come it's open source?
2.
by erdewit 4y ago
> If I had a pair of decent speakers and a microphone hooked up to my PC, how would I go about "tuning" the speakers? Blatant plug: https://github.com/erdewit/HiFiScan
3.
by erdewit 4y ago
How the Germans during their Afrika campaign discovered this bacterium to treat dysentery, which was killing more soldiers then the British troops did.
4.
by erdewit 4y ago
Elemental iodine in solution with iodide forms tri-iodide, which is perfectly fine to consume. This is what Lugol's solution is and it has an unlimited shelf life.
5.
by erdewit 4y ago
I use root to force a 44.1 kHz sample rate for the audio to avoid resampling of my lossless music, which is all in 44.1 kHz. The difference is noticeable even over Bluetooth with aptx(HD).
6.
by erdewit 4y ago
For Linux the list is here: https://git.kernel.org/pub/scm/linux/kernel/git/sforshee/wir... It also shows the maximum power (in mW or dB) for the channels, which is also key to get a good recep
7.
by erdewit 4y ago
> Does this work in encoded videos? For older encodings such as MPEG2, as used in DVDs, it does work. For newer codecs with higher compression I can't extract a heartbeat signal anymore when using the tool that I've written for
8.
by erdewit 4y ago
> because a phase-neutral response created in a room is only valid in one point of the room Author here. The term "phase-neutral" simply means here that the impulse response is symmetrical and doesn't add a phase shift. It
9.
by erdewit 4y ago
This is dealt with by smoothing the spectrum in a way to preserves the power density. The constructive and destructive interference then cancel each other out.
10.
Show HN: HiFiScan, a Python app to optimize your loudspeakers(github.com)
260 points by erdewit 4y ago|103 comments
11.
by erdewit 4y ago
My router uses 8 Watt from the mains, regardless of how much traffic it's handling. It also has an ECO mode that doesn't actually lower the power consumption.
12.
by erdewit 4y ago
When playing FLAC music over aptX HD, the next step for improvement is to avoid any resampling. The music is generally at 44.1 kHz and the default for Android is 48 kHz. It requires root to change the audio config file to 44100, and it&#x2
13.
by erdewit 4y ago
For example, the entire entry for "mass formation" was deleted. The Dutch version still exists: https://nl.wikipedia.org/wiki/Massavorming
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by erdewit 4y ago
The first 16 GB will still be dual-channel, only the remainder will be single-channel (flex mode).
15.
by erdewit 4y ago
What makes Bitcoin a commodity is that nobody can issue more Bitcoin, other then from mining, just like with physical commodities. The market can still be manipulated by the big players but that is besides the point. When more of an asset c
16.
by erdewit 4y ago
Is the TaskGroup really in the 3.11 release though? It's not to be found anywhere in the Python documentation or release notes: https://docs.python.org/3.11/whatsnew/3.11.html It has been talked about for a l
17.
by erdewit 4y ago
On the photo of the Moskva I can't really see a missile impact.
18.
by erdewit 4y ago
It's that the array access of numpy is surprisingly slow compared to a Python list: lst = [0] %timeit lst[0] = 1 33.9 ns ± 0.0415 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each) arr = np.empty(1, dtype=int)
19.
by erdewit 5y ago
With that much LED light I would be concerned about the high blue peak around 450 nm, it's damaging the retina. https://www.ncbi.nlm.nih.gov/labs/pmc/articles/PMC5313540/ https://duckduck
20.
by erdewit 5y ago
Another great option is to mount the remote file system with SSHFS.
21.
by erdewit 5y ago
Other lossy compression methods generally happen in the frequency domain and, depending on the type of music, can introduce audible distortions. This preprocessor on the other hand throws away some of least significant bits to save data. Th
22.
by erdewit 5y ago
Here in the Netherlands there's also a sharp increase in the excess mortality that can't be explained by COVID deaths. https://www.rivm.nl/monitoring-sterftecijfers-nederland
23.
by erdewit 5y ago
Aptx is actually pretty good, certainly for ear pods. It's a time-domain codec which is great for acoustical instruments (the frequency-domain codecs can fail there, AAC too). The signal-to-noise ratio is lower than CD quality but stil
24.
by erdewit 5y ago
A key feature of Kodi for me is that it syncs the TV frame rate to the video that is playing. I don't know any other players on Linux that do that.
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by erdewit 5y ago
The mycologist Paul Stamets wears a hat made of this leather. He has to be careful around fire because of the flammability, it's made from tinder fungus after all.
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by erdewit 5y ago
In the same vein that heavier-than-air flying machines are impossible.
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by erdewit 5y ago
> What a vaccine does - it primes one's immune system, so it fight the virus way more efficient. My understanding is that it does not really fight the virus (viral load stays the same), but that it does prime the immune system so as
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by erdewit 5y ago
It's still a good proof that the smaller pizza's have more crust.
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by erdewit 5y ago
> Are you trusting science to be a pure discipline, motivated only by the search of the truth? A distinction can be made between science on the one hand and scientists on the other.
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by erdewit 5y ago
Could it have been ancient aliens ?!!!?....

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