I took the line out of my Imac with pin adapter from 1/4 inch cable to my DP-03 Line A input/mic.line and tried recording a song from my itunes onto a track and although it looked like the level monitor on my DP-03 was showing movement. When I went to play it back there was no sound? Is what I am doing even possible? Is there another way of getting itunes onto my Dp-03? Thanks!