Synesthesia is a superpower phenomenon whereby a lucky group of people see colour when exposed to stimuli, most commonly sounds. It's the inspiration behind some famous art and music -- but it's virtually impossible for mere mortals to get their heads around. This visualisation is the best attempt I've yet seen.
CHROMO comes from the colour-hearing mind of Pasquale D'Silva, a designer who has previously co-created an app called Keezy, which he describes as a 'colour sound sampler'. FastCompany has a good profile of the app (and the man behind it) here. It's a good look into an evolutionary quirk, and probably the closest you're going to get to seeing sounds without the help of some serious pharmaceuticals. [Vimeo]