ReWire Tutorial Article Cubase 4 - Step 2: Routing Audio
Reason has 64 ReWire channels, selectable as either stereo or mono channels - that means you can use up to 64 separate audio channels from Reason. For now, let's activate the first channels. These correspond to the main stereo out in Reason.
1. In Cubase, select Reason ReWire from the Devices menu.
2. Press the Channel activation button on the left hand side of ReWire channel Mix L. ReWire input for channels Mix L and Mix R will become active, and a ReWire track will be created, along with a corresponding channel in the Cubase mixer.
If you want to, double click on the labels in the right column, and type in another name. These labels will be used in the Cubase mixer to identify the ReWire channels.
3. Try playing back some sound in Reason.
An easy way to do this at this point is to play a drum pattern from a Redrum device (the more advanced option, playing devices via MIDI, is described in Step 3). When the Redrum is playing you should see the level meters move for the ReWire channel in Cubase's mixer, and you should hear the sound from the outputs.
If this all works, you have successfully set up a basic ReWire connection! This setup for example allows you to have Reason play a background track while you record vocals or other audio tracks in Cubase.
But ReWire isn't only about audio. We can also use Cubase's MIDI capabilities to control Reason's devices, just like you would with a hardware synth. If you want to know how to transmit MIDI from Cubase to Reason – proceed to the next step!
Step 3: Routing MIDI