I would like to know whether it's possible to record sound from two different sources on a computer with a single stereo jack input (I'm not sure whether this is a "line in" or "mic" input).
Each microphone would be at most at about 6m (20ft) from the input jack, but possibly at different length (one could be 1m away from the computer and the other one at 6m). I don't have any specific microphone in mind at the moment, but they could be of different type.
Are there any problems I should expect? In particular, would soldering the two mono wires onto the same jack (sharing the same ground) cause any problem, or should there be a circuit ahead? If so, what kind of circuit?