ReWire Tutorial Article Digital Performer - Step 3: Routing MIDI
Via ReWire you are not limited to transmitting only audio from Reason to Digital Performer, you can also send MIDI from Logic to Reason. This way you can control everything from Logic - in effect, Reason becomes a rack of devices that you play from the Rewire host! Or, if you like, you can have Reason's sequencer play some of the devices and the sequencer in Logic play some - it's up to you.
1. In Reason, create the device you want to play.
2. In Digital Performer, create a MIDI track.
3. All devices in the current Reason Song are listed in the Output pop-up menu for the MIDI track. Select the Reason device you created in step 1.
The MIDI track is now routed to the correct device in Reason. If you enter some MIDI notes on the track and hit play, you will hear them being played by this Reason instrument. This works just as if each Reason device was a stand-alone hardware MIDI sound module.
You can also play Reason instruments "live" this way by activating MIDI input for the track in DP and playing your MIDI keyboard. All incoming MIDI is immediately sent to the track's MIDI Output - the Reason device.
Digital Performer uses a concept of MIDI buses, with 16 MIDI channels per bus. By default, the first 16 devices in Reason (in the order created) are assigned to Bus 6. If you have more than 16 Reason devices in your rack, the next device you create will appear in the Bus 7 submenu.
Step 4: Using multiple ReWire channels