Chord-theory visualizer traces an E7alt progression
42.6K views·761 likes·472 saves·87 reposts·Posted 24 Sept 2026 · 0:24 · Art
Our note
A glowing circle of pitch classes draws polygons for each chord of a dense jazz progression; every sound and visual comes from JavaScript Opus wrote, with no samples or libraries.
The creator’s post
You can ask Opus 5.5 to write extreme music theory wankery and it will do it in javascript. Theory-porn as a genre? everything you see and hear is generated from javascript code that claude wrote. no samples, no libraries 🔊
The prompt
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Make one like this
1 · Start from a template
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2 · Direct it like an editor
Ask for one self-contained HTML file on a fixed 1920×1080 stage, link this video as the reference, and send two or three rounds of specific notes.
3 · Render it to MP4
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How it was made
The creator didn’t name their tools. Most videos like this are HTML, canvas or SVG animation written by Claude and screen-recorded or rendered to MP4. How that works →
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