When Donkey Kong came out. I So many hours spent on it. I nearly flunked grade 5 because of it.
It's a problem I share as well. After I've recorded a MIDI file using the moto x3m program, only then does the piano pedal register when I play.
I have the same problem. While I play my piano, the app seems to work properly with my piano pedal, but only after I record a MIDI file. There is no pedal sustain effect in my MIDI file.