I am not aware of a way of doing this and if someone on the forum does, I am sure they will post an answer if so.
Not sure what your need is, but one way of doing this will be from a Passenger Headset connection in the Aircraft? It is a standard 1/4 Jack out if a GA machine normally. You can obtain an Intercom and Pilot output from that most likely.
Let us know more specifics and we may be able to offer something else?