Yes, I've definitely heard it. Which does not prove it's a fault in the device—it could be a fault in my fried brain—but anecdotally, I've never noticed it on

Yes, I've definitely heard it. Which does not prove it's a fault in the device—it could be a fault in my fried brain—but anecdotally, I've never noticed it on any other music playing device, since the time of the original walkman (and in that case the music would usually slow down due to attrition or other mechanical faults, but rarely if ever speed up.)