When opening RECentral 4 receive “Device is occupied” error message, what to do?

A:Either there is no audio output device installed on your PC (speaker or headphone), or they were not enabled in Volume Control Panel

→ Please confirm that your audio output devices functions properly (in Windows Volume Panel)

B: please make sure to quit Skype or Browser (Chrome, Internet Explorer, Firefox) or other 3rd party running applications (XSplit, OBS) before launching RECentral 4.