MPC X, MPC Live, MPC One & MPC Key 61 Forum: Support and discussion for the MPC X, MPC Live, MPC Live II, MPC One & MPC Key 61; Akai's current generation of standalone MPCs.
They are not intended to be used when writing files to the file system. I imagine they just lifted a standard library for rendering the keyboard... this is likely an easier task than writing and formatting their own keyboard.
Nah, all the letters and symbols on mine were active at one point, then after an update (2.-something) only the letters & numbers work & the rest are grey.