Mixing : Basic Mixing : Signal Routing for Monitoring and Submixing : Generating Stereo Output from a Mono Send/Return

Generating Stereo Output from a Mono Send/Return
You can use an Auxiliary Input to generate a stereo output from a mono send. Set the send destination to a mono Auxiliary Input track and place a mono to stereo plug-in on the Auxiliary Input. The output of the Auxiliary Input becomes stereo.
To create a “stereo” effect from a mono source, you must use reverb, delay, or other time domain effects.