2. Create a ReBirth Input Machine.
You may want create a Mixer prior to this step, otherwise the L/R Mix channels will be routed directly to the Audio Hardware Interface. If you have a Mixer, the L/R Mix output from the ReBirth Input Machine will be automatically connected to the mixer's first available audio inputs.
4. When ReBirth is launched, select Reason as the application in focus.
If both the "Reason is Rewire Master" and the "Active" indicator on the ReBirth Input Machine are lit, this indicates that the launch procedure was correct and that Reason and ReBirth are now locked and in sync.
If only the "Active" indicator is lit, either the launch order was wrong, or ReBirth is not installed properly.
5. Activate playback on Reason's transport panel.
ReBirth and Reason are locked in perfect sync, and will follow any transport commands in either of the programs.
Note that there is no master/slave relationship for the transport controls when using ReWire, as either device will control the other device's transport. The audio, however, is streamed from ReBirth to Reason, so in this aspect Reason is the master device.