It's possible to assign the RC-300's Rhythm Guide so that its signal comes out of the SUB outputs only. This can be useful if you want to have the Rhythm sent to a separate channel on a mixer so that it can be processed separately from the main phrase (loop) tracks.
Here's how to assign it.
1. Press the EDIT button within the Rhythm section.
2. Press the parameter right button repeatedly to select "Rhythm:Output."
3. Turn the MEMORY/VALUE knob to choose "SUB."
4. Press WRITE twice if you want to save the new setting to the Memory location.
Repeat the process for any other Memory locations as desired.