Have a little patience. You posted in the middle of the night and you expect an answer immediately? Do you think these forums are actually monitored 24/7?
To answer your question, all I had to do was look at the manual online, something you should do when researching projectors. What you want to do is not possible. The projector does NOT have an Audio OUT. To use headsets or direct the audio to your receiver, you will have to connect the audio from the SOURCE to the receiver.