Sounds (pun intended ;-)) intriguing. Is a specific visually perception related to specific sound, e.g. like the classic example of a musical note evoking the perception of a specific colour?

On a slightly related note, being colour blind Neil Harbisson - the world's first legally recognized cyborg - had an antenna implanted in his skull that allows him to perceive colours as sounds (musical notes and even chords, specifically); so, the inverse route in a way.