Can I use multiple sound cards with the same sound source at once?

Question

Given a system with two sound cards (one onboard and the other USB):

Is it possible for me to configure Windows 7 (directly or with the help of third party software) to replicate/clone the audio output from any given application (VLC, etc) so that I hear the same output in both the sound cards?

Answer 1

This is possible with the help of tools such as Virtual Audio Cable.

This tool allows one to create a virtual audio device, the output to which can then be routed to other sound cards present in the system.