Hi. Sorry to bump this but I just wanted to know if this feature is possible. And if it's a yes, how can this be done?
You need to run the Full Control and View mode. While in this mode, move your mouse pointer closer to the top edge of the Full Control screen - a toolbar will slide down. Click on the settings (the Gears icon) and enable 'Capture sound' option in the settings window.
In one of later releases we'll refine this feature. Most likely we'll make a separate "Get remote sound" connection mode.