Hi- I searched for an answer and still haven't found one. I want to play audio out of my iPad in my classroom but the speakers that are connected to my smartboard are USB. Is there a headphone jack to USB adaptor? Also, is this my possible solution (even thought it would require me to add another audio cable into the mix which I would like to avoid). http://www.monoprice.com/products/p..._id=1031105&p_id=2881&seq=1&format=4#feedback Thanks!