An organ fugue in D minor, written in LilyPond
Author says Fable 5.2. Not verified.
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Our note
Engraved sheet music headed Fugue in D minor, for organ, in the style of J. S. Bach, fills the frame while a blue cursor tracks the playback across two manual staves and a pedal line, page after page. The author says Claude Fable 5.2 wrote it in LilyPond at extra-high effort, compares it to Opus 5.5 without calling it better, and published the prompt.
Written by The Frontier Brief after watching the video (Nov 10, 2026). It describes what is on screen; we have not run the work ourselves.
Prompt
In LilyPond (version 2.24), write a complete fugue for organ in the style of Bach.
What we know
- Model
- Claude Fable 5.2 (author’s claim)
- What we checked
- The post names Fable 5.2 (reviewed 2026-11-10). Which model actually ran is the author’s claim.
Video from @aug5thmusic’s post on X, credited to the author. Want it taken down? Email support@fable5.app.
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