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by Gregordinary 1952 days ago
The title sparked a memory of someone using a flatbed scanner and some software back in 2002 to extract audio from scanned images of record tracks.

https://www.cs.huji.ac.il/~springer/DigitalNeedle/index.html

Results were interesting though fairly unintelligible. Practicality aside, wonder if/how much this method could be improved today?