Synesthesia
A condition where senses get mixed up, leading to experiences like seeing colors when hearing sounds. Discussed in relation to Beethoven and other talented individuals.
Videos Mentioning Synesthesia

Science-Based Mental Training & Visualization for Improved Learning
Andrew Huberman
A phenomenon involving the blending of different perceptual experiences, where one sensory input triggers another (e.g., associating colors with musical notes).

#37 – Zubin Damania, M.D.: Revolutionizing healthcare one hilariously inspiring video at a time
Peter Attia MD
A neurological phenomenon where stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway, used by Hoffman as an example of mutated perception.

David Chalmers: The Hard Problem of Consciousness | Lex Fridman Podcast #69
Lex Fridman
A phenomenon where stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway, like seeing colors when hearing music, which David Chalmers experienced as a child.

Secret History #12: Heaven on Earth
Predictive History
A condition where senses get mixed up, leading to experiences like seeing colors when hearing sounds. Discussed in relation to Beethoven and other talented individuals.

Exploring Consciousness, Sensory Augmentation, The Lazy Susan Method of Productivity, and More
Tim Ferriss
A neurological phenomenon where stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway, such as numbers triggering color experiences.