Currently, I listen to iTunes with the MacBook pro connected to the DAC via the Digital input USB port. My current system: Oppo < external DAC < integrated amp < speakers. Question: can I get rid of the external DAC and hookup the Oppo directly to the integrated amp so I can listen to iTunes? I suspect I would need to connect the MacBook pro to the Oppo, but I haven't figured out which connection to use (or if it's even possible). Thanks for your help.