I was having crazy problems - first nothing suddenly - a suddenly corrupted SD card seemed the answer and it did start almost working. Then, a new problem, it will follow 1V/oct cv sometimes, not others, where it will output a single note only. I had solved some similar issues with my Poly Cinematic by updating firmwear, so I did the same with Pianophonic, but now it wont respond to anything, no front panel lights at all. Eric