ReWire Tutorial Article Logic 8 - Step 3: Routing MIDI
Via ReWire you are not limited to transmitting only audio from Reason to Logic, 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 Logic, pull down the Track menu in the arrangement window and select "New...".
3. In the pop-up that appears, select External MIDI and make sure that "Open Library" is checked. Press the Create button to create the track.
4. On the right hand side of the screen you will find the Library. If you select Reason in the Library all the devices in your rack will be listed.
5. Select a device to route the output of the External MIDI track to that device.
The External 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 Logic and playing your MIDI keyboard. All incoming MIDI is immediately sent to the track's MIDI Output - the Reason device.
If you want to add more ReWire MIDI channels in Logic, just repeat the above steps to create additional External MIDI tracks in Logic and assign them to a Reason device in the Library.
Step 4: Using multiple ReWire channels