The Input Line Out switch determines whether or not the signal coming into the RC-505's inputs will be fed to the Line Outputs. Set this switch to off when you don't want the input signal to be heard out of the Line outputs or the Phones output.
1. Press the SYSTEM button.
2. Press the parameter right button (>) repeatedly to select "Sys: InputLineOut."
3. Turn the MEORY/VALUE dial to set the switch as desired (On/Off).
4. Press EXIT when you're finished. The new settings are saved automatically.