gbh444g

6 ms·

1.
by gbh444g 4y ago
This is a client-side WebGL-based spectrogram tool that allows to edit the wavelet function (in GLSL). As a result, it supports custom wavelets.
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Show HN: I've made a GPU-based wavelet spectrogram tool for birdsongs(github.com)
34 points by gbh444g 4y ago|3 comments
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by gbh444g 4y ago
Another method of visualizing birdsongs is interpreting pitch as direction: https://github.com/soundshader/soundshader.github.io/tree/ma... I suggest to call this field of science "birdographics" an
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by gbh444g 4y ago
FWIW, I've been exploring ideas of what bird songs really are. One idea I came up with is "birdglyph" - a distinctive hieroglyph-like picture produced by a birdsong. A few examples: https://github.com/soundsha
5.
by gbh444g 4y ago
> how someone can overengineer a solution If his solution doesn't work with arbitrary number-like objects (matrices at the very least), doesn't support voice input, can't send results via email and can't seamlessy res
6.
by gbh444g 4y ago
Great map. I suggest to paint active subreddits as bright circles and stale ones as dim circles, so the map would look like Europe viewed from satellite at night.
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Birdglyphs – a new way to draw birdsongs(github.com)
2 points by gbh444g 4y ago|0 comments
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by gbh444g 4y ago
It writes very convincing pop-sci articles about high energy photons and the like. I see no way how even a proper AI can distinguish it from similar articles written by journalists.
9.
by gbh444g 5y ago
Try green people, blue people, yellow people. Even 'transparent people' returns relevant results.
10.
by gbh444g 5y ago
It sounds this is what I'm doing: taking ACF at equally spaced offsets. Not sure what the sum of ACFs would achieve, but this might turn out a good idea.
11.
by gbh444g 5y ago
It does, but ACF[X] at 0 is the sum of X[i] squares, so when sound gets louder, ACF at 0 also gets higher.
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by gbh444g 5y ago
Well, I don't know. My personal reason is that 432 has at least some connection to reality, e.g. half day = 43,200 sec, or speed of light = 432 x 432 miles/sec, or Sun's radius = 432,000 miles. This means that if we take dist
13.
by gbh444g 5y ago
432 vs 440 Hz in music is the equivalent of the C++ vs Java battle. Vivaldi was a proponent of 432 Hz, so it's only when he died, newthinkers had recalibrated pianos to 440 Hz. I believe the newthinkers are simply lacking taste, and ro
14.
by gbh444g 5y ago
Not really. ACF is defined as a convolution of signal X with itself: XX. But FFT turns a convolution into a dot product: FFT[XX] = FFT[X]·FFT[X], or just |FFT[X]|². But what is this really? If X is a sum of A·cos(2πwt+φ) waves, then FFT[X]
15.
by gbh444g 5y ago
Interpreting ACF images: 1. Time progresses from the center to the edge of the circle. 2. Color means note, e.g. A4=432Hz is red, but so is A1, A2 and all other A notes. B is orange, C is yellow, D is green and so on. 3. The amount of fine
16.
by gbh444g 5y ago
The only way right now is to use the demo and download the sounds yourself (you can use the meows from my link to get the same images): https://soundshader.github.io/?n=4096&img=2048&acf.lr=5&sr=5...
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by gbh444g 5y ago
Wikipedia is great at obfuscating simple ideas in complex math. The "Efficient computation" explains the idea well, but it could be made even simpler. The amplitude squaring step drops the phase there.
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by gbh444g 5y ago
Here are vowels: https://soundshader.github.io/vowels
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by gbh444g 5y ago
Hi HN! I used the meow sounds from https://soundspunos.com/animals/10-cat-meow-sounds.html . I expected to see very little variability in the meows, maybe just 4-5 different types for basic emotions. To my surprise, eac
20.
by gbh444g 5y ago
Yep, that's the idea.
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by gbh444g 5y ago
Amplitudes are normalized locally, using something like a moving average. Global normalization rarely works because most sounds have high dynamic loudness range.
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by gbh444g 5y ago
Hi HN! In my previous post, https://news.ycombinator.com/item?id=25037784 , I presented so-called ACF images, where the auto-correlation function of a sound waveform is drawn in polar coordinates. It turned out that ACF imag
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Visualizing vowels as colored ACF images(soundshader.github.io)
26 points by gbh444g 5y ago|10 comments
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Solar System Proportions(q8pmz.github.io)
1 points by gbh444g 5y ago|0 comments
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Transcendental Proportions of Solar System(q8pmz.github.io)
3 points by gbh444g 5y ago|0 comments
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by gbh444g 5y ago
Population grows exponentially, housing grows quadratically (as circles around towns and cities). About 20 years ago the two curves had met and since then they've been rapidly diverging.
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by gbh444g 5y ago
I'm not a linguist and I don't even know any greek (other than the alphabet I've memorized once), but if "epi" means "above" and "ousia" means "essense", then the meaning of "epiou
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by gbh444g 5y ago
Are there large Ulam spirals? e.g. 100k x 100k, where each pixel is the density of prime numbers there. Do they show any interesting structure?
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by gbh444g 5y ago
Price for the Pro version? I'd buy so long as it comes with Ubuntu/Debian.
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by gbh444g 5y ago
Not sure I get the idea about triads. Say the three notes are just sine waves with frequencies 200Hz, 300Hz and 500Hz. What will the graph look like?

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