Multiple inputs from one button press when fast forwarding games

Hello all,

I’m fast forwarding Final Fantasy 1 on a NES core. I have it set to 2x speed and it’s great, except my button presses on my Xbox 360 controller result in multiple inputs/presses of that button being detected. If i just very slightly and quickly tap a button I can get just the one press but it’s difficult. Is there a setting I can modify for this?