absorptions

a blog about sound & signals by windytan [oona räisänen]

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Feb 27, 2023

Using HDMI radio interference for high-speed data transfer

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This story, too, begins with noise. I was browsing the radio waves with a software radio, looking for mysteries to accompany my ginger tea. ...
23 comments:
Nov 28, 2021

Spiral spectrograms and intonation illustrations

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I've been experimenting with methods for visualising harmony, intonation (tuning), and overtones in music. Ordinary spectrograms aren...
10 comments:
Mar 29, 2021

Speech to birdsong conversion

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I had a dream one night where a blackbird was talking in human language. When I woke up there was actually a blackbird singing outside the w...
44 comments:
Dec 8, 2020

Plotting patterns in music with a fantasy record player

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Back in April I bought a vinyl record that had a weird wavy pattern near the outer edge. I though I may have broken it somehow but couldn&...
9 comments:
Aug 24, 2019

Capturing PAL video with an SDR (and a few dead-ends)

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I play 1980s games, mostly Super Mario Bros., on the Nintendo NES console. It would be great to be able to capture live video from the conso...
25 comments:
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