I am new to sound. I just started mixing the sound at our church on an Allen and Heath 16 channel mix wizard. Someone gave me a Lexicon Omega. I want to take the some of them and start to practice on doing more than just adjusting the volume for each channel without messing up the EQ on the board at the church. Right now the line outs for each channel are going to the Avion (In-ear monitor system). How can I get some of the individual channels from the mixer to the Omega to my mac so that I can practice playing around with more than just volume?