If you've never heard the term, wikipedia describes it as: "Synesthesia (American English) or synaesthesia (British English) is a perceptual phenomenon in which stimulation of one sensory or cognitive pathway leads to involuntary experiences in a second sensory or cognitive pathway." It's different for everyone, but the most commonly reported one is perceiving certain 'colors' or 'shades' to letters and numbers. For me, it's different. I get a visual representation of sounds in the "mind's eye" - all sounds, including music. I could go into more detail if someone is interested, but for the most part it is streaming lights and glowing shapes over a dark background. It's down to the point where my mind actually records sounds and music this way- If you name a song I've heard before, I recall it (first) by what it looks like and then I can hear the sound(s). I recognize guitar tones visually, not by sound. It's hard to describe. There has lately been a surge of young musicians citing synesthesia as their 'superpower', allowing them to see every note as a different color and empowering them to build complex musical compositions using "the mind's eye". I'm not so lucky. At most my synesthesia helps me identify musical intervals. 3rds, 4ths, 5ths, 7ths, etc. I can tell you what interval something is but I can't tell you what notes they are. It wasn't until my 30s that I learned not everyone else 'sees sounds' like I do. I don't really get any 'superpower' out of it, but it definitely gives me a different channel to experience and/or enjoy music. Oh, and I also get a visual representation to physical stimuli and tastes. So I have mental imagery for different foods and things like rubbing my skin, hair, or pinching, etc. Does anyone here have any experience with synesthesia, or any stories to tell?