The only thing I can think of is getting:
- USB to 3.5mm jack convertor
- 2 x 3.5mm jack to 1 x 3.5mm jack convertor.
Plug your usb mic into the jack convertor and you can them plug both mics into the 2 1 jack convertor and stick in in your sound card. I havent tested this but I guess it would work.
don't go there. 2 analog signals mixed into 1 signal can cause them sort of neutralize each other at times. secondly, i believe that second adapter is just combining 2 mono plugs to a 1 stereo plug. wouldn't even work in a mic jack.
your best choice would be using a software wich allows you to mix 2 different inputs (or 3, one being your game) into 1 master signal. any simple recording software should be able to do that.
Any recommendations to try out?