Viewing profile — gbh444g

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.

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 …

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…

> 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 resu…

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.

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…

Try green people, blue people, yellow people. Even 'transparent people' returns relevant results.

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.

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.

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 = 4…

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 b…

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 thi…

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 orang…

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=20…

The xkcd is half-right. Cats are ACFs, not FFTs, because they are even functions in polar coordinates, I mean the left half of the cat mirrors the right half, and the two halves me…

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 d…

Here are vowels: https://soundshader.github.io/vowels

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 …

Yep, that's the idea.

Amplitudes are normalized locally, using something like a moving average. Global normalization rarely works because most sounds have high dynamic loudness range.

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 po…