I wonder if this is possible. What I want is this kind of setup:

Music Player Audio (software) ---> Audio Input (like in an online game)

Microphone Input ---> Recording Output

All other computer sounds ---> Headset

I wonder if I have to manually add a recording device for my program, in order for my computer to recognize the program as an "Input Device" as to make it a "Microphone" to broadcast music with (as in over a game). The problem I see is that audio is an output and a microphone usually requires an input.

So I guess my question is:

Is there some kind of program that can redirect the audio as if it were playing into a microphone while only using software?