problem with double kick pedal in guitar hero

[TrashPandaRacc]

i was trying to play guitar hero with drums but i dont have any drums so used a keyboard for a kick pedal and another keyboard for the cymbals and toms but some song needs a double bass drum pedal so my idea was to have two keyboards with the space bar as the kick pedal and use that but when if i press space on a keyboard and my other foot isnt off the other keyboard then the input doesn't count because the space bar is held down

[KHg8m3r]

Windows treats all keyboards plugged into your computer as one keyboard, so you'll have to setup a modifier key of some sort for the double kick pedal. Like if you hold shift and then press space it does a double kick or something.