Maddie also contacted me through my post, sending me sketches of her Synesthesia. She tells me she has grapheme-colour, instrument-colour, and pitch-colour Synesthesia.
I find the difference in colour from electric guitar to acoustic fascinating, the fact that the sound can change within the same instrument class. Then again, I guess it should, it produces distinct sounds, therefore evoking distinct colours.
Ramirez, M. (2016). Looking for Synesthetes. [email].