synesthesia

Synesthesia (also spelled synæsthesia; from the Ancient Greek σύν syn, "together", and αἴσθησις aisthēsis, "sensation") is a neurological phenomenon in which stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway.
The most frequent type of synesthesia is seeing sounds and automatically combine them to specific colors.

Aired on Join radio March 23rd
this one goes to my favorite 'A'

#WhenYouHearColors