Controlling Reason via MIDI
Reason provides access to many of its controls and synths via the ReWire MIDI busses. To make use of this feature, you need to set a MIDI Out channel in FL Studio to a specific port/channel which is mapped to the ReWire MIDI bus of Reason:
Open the MIDI Options for ReWired
Click the MIDI Options button for the ReWired channel that is linked to Reason.
Map Input Port
To send MIDI data to Reason, you need to map an FL Studio input port to the ReWire bus.
Use the following settings to create a new mapping:
Port: 50 (or any free MIDI port you have)
Click Add/Change and the mapping appears in the Mappings list.
Create a MIDI Out channel
Add an instance of the MIDI Out channel to your project.
Adjust the MIDI Out settings
Set the output port of the MIDI Out channel to 50 (or the port you have selected to map earlier).
Reason’s default project contains a controllable synth on channel 2 – MelodyB (for a full list of synths, check the Channels list in the ReWired MIDI Options window), so select channel 2 in MIDI Out.
Now any notes you play in MIDI Out are sent to Reason and played by MelodyB. You can add additional MIDI Out channels to control the other available channels as well.