Tonight I present to you a problem to which I need solutions for.

I have 2 audio cables (1 being the mic, the other one being the guitar).
Mic is connected to the mic line, and the guitar is connected to the blue line in.

I want to be able to use both of them in teamspeak/skype/mumble/etc, but all of these programs only let me choose 1 capture device.
Since I can't really bypass this, I'm trying to connect both the guitar and the mic to 1 virtual source so that I could use it as a capture device in mm3.

So far I've tried a program called Virtual Audio Cable, which should have done the trick, but it didn't work for me :(.

Any ideas?

Update: After trying VAC and Voicemeeter, both give me similar errors, when plugging in the 2nd input (wether if I start with the mic or guitar) it will not do anything, the first input will still be heard, and the 2nd one will be ignored (in VAC case it even says the input is already in use). So I'm assuming there's something wrong with my Sound Card.
NNScript in IRC tells me these are my sound cards (?):
(Sound card 1) Dispositivo de audio USB, brand: (Audio USB genérico)
(Sound card 2) AMD High Definition Audio Device, brand: Advanced Micro Devices
(Sound card 3) VB-Audio VoiceMeeter VAIO, brand: VB-Audio Software
(Sound card 4) VB-Audio Virtual Cable, brand: VB-Audio Software
(Sound card 5) Realtek High Definition Audio, brand: Realtek
(Sound card 6) Virtual Audio Cable, brand: EuMus Design