Mixing Board Question

Hello everyone. Is this in the right place?

I am wondering if this is possible:
Have a mixing board (3-4 channels):
Ch 1. Microphone.
Ch 2. Computer.
Ch 3. Aux.

Would it be possible to do this and then feed out this mixer into another computer which broadcasts the whole mix as an internet radio station?

Should be possible. You would want an audio interface between the computers and the mixer so you are not going out of a headphone jack, also I don't know if you would be able to stream it live, or if you'd be better off recording the show than podcasting it or something like that.

What do you mean by an audio interface?

Mac 101: Audio Attachments

Haven't read the whole thing but gives you a good overview, so from a mixing desk, you would send the audio out, through the interface into the computer that is recording/streaming.

If the mixing board has RCA output, usually labeled as Rec Out, you could get an RCA-to-mini cable and plug in to the audio line-in jack on the computer.