I have been using CEntrance DACmini to drive sennheiser HD700 headphone. I have replaced Mac Pro with MacBook Pro 15 2016 and I am trying to find a way to get either S/PDIF (either Toslink or coaxial) digital audio signal to DAC from MacBook Pro. One option is to get OWC Thunderbolt 3 dock once it is release as it has S/PDIF output (Toslink). I currently have OWC USB-C dock and do not really need OWC Thunderbolt 3 dock for any other functions. Any suggestion for getting digital audio out to DAC?