I want to use my iPad to play pre-recorded backing tracks during live performances. My questions are: 1. How do I connect the iPad to a PA. with wires? 2. Can I connect my iPad to the PA using some type of wireless receiver attached to the PA, thus eliminating the need to be too close to the PA or mixer? 3. I assume I can use iTunes to select specific tracks and the play them. Is that correct, or is there a better way?