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Prikvačeni tweet
Thought I saw a sine wave sculpture. Turns out it was just the real part of this complex sinusoid.pic.twitter.com/fn2SULstSs
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The right border can look messy in some fast YUV modes. Idea: optional zoom-in to hide 1% overscan (only the top-right corner shown here)pic.twitter.com/WWwAMAc6NO
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Moderate levels of noise could optionally be removed by adapting the FFT windowing function to SNR (based on F2DC's article in the May/June 2003 issue of QNX: "Some Thoughts on Real-Time SSTV Processing")pic.twitter.com/XZ2T13MNzA
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Experimental command-line SSTV decoder used with iTerm2's imgcatpic.twitter.com/MI4LkSi0ac
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I did try this with a stereo photo pair and color SSTV earlier. There was a perceptible stereo effect in the audio but mostly the colors just all sounded shifted to the right wrt the sync signal. So a slight disappointment. Maybe a simple line drawing would sound more fun.
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The reason I think this would sound interesting is that the depth illusion comes from the horizontal offset of corresponding objects in the two images. In a radiofax transmission, a horizontal offset corresponds to a time delay. We can use inter-aural delays to hear directions.
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Shower thoughts: If you converted a stereoscopic image pair into two radiofax transmissions so that the left image was played to the left ear and vice versa, could the inter-aural time differences tell your brain something meaningful about 3D depth in the image?
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Some waveforms (no spectrograms) recorded in 1993: "A New Type of Furniture ESD and Its Implications" http://www.emcesd.com/pdf/eos93.pdf
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Has anyone managed to record the kind of EMI a gas lift chair would emit? https://twitter.com/royvanrijn/status/1214162400666103808 …
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This could be a bug, but I don't normally (npi) work with 3D software so could be expected, too? 1. Scale (s) the default cube to -1.5 so that normals flip 2. Export as PLY 3. Import the PLY 4. scale transform is correctly applied to size but the two objects have opposite normals
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If you ever encounter a mysterious problem of Blender exporting PLY with inverted normals, check that your object doesn't have a negative scale transform by mistake. (At least it made me write a lot of unit tests!)
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Another one based on Chu et al. (2002): Detailed Directivity of Sound Fields Around Human Talkerspic.twitter.com/n44Cz5Ts5R
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Reading fascinating research papers at 2am again. Here's one about the frequency-dependent directivity of the human voice. https://www.researchgate.net/publication/236213215_Directivity_measurements_of_the_singing_voice …pic.twitter.com/2vqO9e31xq
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Found a more densely sampled database of head-related impulse responses to use in 3D experiments. The 2001 paper has friendly-looking diagrams as well. https://www.semanticscholar.org/paper/The-CIPIC-HRTF-database-Algazi-Duda/7dabd56ccd524f78f0eda5073dc358f28893a45d …pic.twitter.com/2ZtX8UXQWu
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You can still hear how the HRTF model is sampled only at 15° intervals. Perhaps I could interpolate.
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Doppler effect emerges when the acoustic path tracing update rate is high enoughpic.twitter.com/Br0GRAq1Zk
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Piinaako pohjoisen pimeys? Ensi viikosta kirkastuu. https://www.timeanddate.com/sun/finland/helsinki?month=12&year=2019 …
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Random idea: reconstruct original audio from vinyl scratching
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A little video of said project (note, surprisingly high dynamic range in the audio)https://www.youtube.com/watch?v=K61M1dL1fmU …
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Coding something that uses a FIR filter with a 32-kpoint impulse response that changes on the fly a few times per second. But I want the changes to happen smoothly. So I'll filter the filter with 32,000 smaller filters...
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