Audio Switcher Panel
The Audio Switcher panel lets you control the per-application audio device switcher.
Switch Audio Playback In All Multimedia Applications Automatically group of controls - here you can define, which device the audio output in a just launched multimedia application should be redirected to by default:
Bound to monitor radio button - switch audio playback to a device bound to the monitor the application is started on;
Exactly specified radio button - switch audio playback to an exactly specified device, no matter which monitor the application is started on;
These options are the same as those in the Window Settings - Default Settings - Startup panel.