Problem sending keystrokes to emulators

Is there a way to make a touch bar keystroke take longer? I'm trying to use the touch bar with some emulators and it seems that the key strokes may either be sent too fast to be picked up by the emulator, or they need a key down and key up event. In particular, I was trying to get Stella (Atari 2600 emulator) to work. Select and Reset (F1 and F2) don't seem to work.