What's the differnce between “Set as Default Device” and “Set as Default Communications Device” in the Sound configuration in Windows 7?

Question

I noticed that there are two similar options in the "Sound" (Soundcard Configuration window->playback tab in the context menu) window in Windows 7.

What is the difference between these two options?

• "Set as Default Communications Device"
• "Set as Default Device"

Answer 1

There is a blog about it here.

• Set as default device - All programs will have their audio played through this device (unless otherwise configured)

• Set as default communications device - All calls/video call audio will be played through this device (unless otherwise configured)