You must restart your computer for the new virtual devices to appear in your sound settings. Why use C and D instead of just one?

VB-Audio offers a separate free cable called . This gives you one additional cable (high quality, up to 192kHz). Install it alongside the standard VB-CABLE to get two total cables for free.

Download the VBCable_CD_PackSetup.zip and extract its contents to a folder on your desktop.

After your free test, you will hear beeps. Here is how to permanently activate the free download into the full version.