Anyone know of any semi-decent freeware mixer that can combine two port into one virtual port? As an example, combining stereo-mix with a microphone input combined together to be seen by the PC as a single input.
ahh...that's different. "Stereo Mix" or "what you hear" applies only to the inputs of the audio chipset. If you are using a USB input, that is not using the audio chipset, it's treated as a seperate audio chipset.
In any case, I've not seen what you are asking for, it may or may not exist, I don't know.
In any case, the easy fix is to simply use a standard mic (ie: 3.5mm jack). -- Google is your Friend