I think I may have some sort of this when it comes to music. I can't really concentrate when listening to music. I get so much into it, I can imagine a whole universe, like everything in the mix must have its visual space. When I compose/mix, I try to give everything its visual spot in the scene... it's weird. I can't tell how most people enjoy music so I don't know if this is """synesthesia""" or something else or whatever ... I just wanted to share how I enjoy/compose music !
EDIT: Also I always associate a track with a color. The vibe of the track has a color. The melody adds something to it. Music can get visual artwork to me.