Synaesthesia

While I have never experienced acute synaesthesia in any form (it sounds really cool!), the closest I have come is with sound-color synaesthesia. With sound-color synaesthesia, you see a certain color or image correlating with a specific sound, music key, or loud noises. I will often (ONLY if my eyes are closed) see a flash of bright light (somewhat similar to a firework) if I hear a loud noise or crash- the more metallic the sound, the more intense the image that flashes before my eyes. A number of my friends associate specific colors with specific music keys, or with specific composers; for example, D minor is purple while A major is red and C major is sky blue.