Camille also contacted me through my post on the Synesthesia Community, sending me her experiences of sounds. This is currently the only visual depiction of a sound based synesthesia on my blog.
"It is a picture of flutes and clarinets, I believe, that were warming up for an opera. It was in a small room and the sound was really overwhelming at the time. I had to step out of the room because it was almost made me nauseous."
Again, we have references to Sensory Overload, something sound ties into heavily.
Moore, C. (2016). Synesthesia. [email].