Hi everybody! My magic number just came up for the AX8! Also have 2 Presonus E8's coming for the workstation I'm building. How do I get music from my iPhone and or Macbook pro into the E8's while having guitar signal through simultaneously? I have Bose bluetooth headphone that I could play backing tracks through while I play but I really want to get the most I can out of the E8's up to and including tv sound in the future. How can I easily do this w/o switching a bunch of damn cables all the time? Please forgive a complete novice!! If devices are involved some specific recommendations would be great!!! Thx!