I have FL Studio Rewired into a track in Ableton and it receives note values but doesn't receive sustain pedal messages even though it responds in the Input MIDI dropdown. The sustain pedal works in Ableton and FL individually but will not pass-through Rewire. Is that a feature of Rewire or am I missing something? I've tried different MIDI configurations for Input/Output (ie Remote ON/OFF) and using External Instrument to send the MIDI to the Rewire channel.
EDIT: So it seems like I can send CC from my keyboard using the knobs (I can link the pedal input to CC 73) but the sustain pedal (CC 64) message gets turned into a note message.
DOUBLE EDIT: I found a workaround. In FL Studio's properties, there is an option for "Foot pedal controls note off" which forces the notes to sustain forever. I guess I'll continue working on a robust workaround.