Has anyone here successfully trained synesthesia

[FlorianMinges]

These two forum posts might be of help to you:

Study: Synesthesia Can Be Learned

Scientists Think Synaesthesia Is Something You Can Learn A recent experiment by conducted by the University of Sussex suggests it may be possible to learn to experience synesthesia, a rare condition that mixes up brain signals and leads people to hear colors or taste words. Researcher David Bor had volunteers read ebooks with 13 letters consistently written in a specific color. In addition, the volunteers spent 30 minutes every day associating the letters and colors, working on increasingly dif…

Synesthesia Training Program (Letters and Numbers)

Check this out: Pseudo-Synesthesia through Reading Books with Colored Letters Methodology/Principal Findings Non-synesthetes were given specially prepared colored books to read. A modified Stroop task was administered before and after reading. A perceptual crowding task was administered after reading. Reading one book (>49,000 words) was sufficient to induce effects regarded as behavioral markers for synesthesia. The results of the Stroop tasks indicate that it is possible to learn letter-colo…