I just bought a BenQ SW2700PT. It is connected, via a Displayport cable, to a late 2014 mac mini. The headphone jack on the mac mini also doubles as an optical digital audio output. Before I purchased the Benq I had been using the optical output on the mini to connect, via Toslink, to a digital to analog convertor that is then connected to my audio system. Unfortunately, I have not been able to find a way to bypass the Benq monitor's speakers and use the optical digital audio output on my mac. Since I have a large collection of high resolution digital music I like to listen to, this has been a huge disappointment. Also, the controls for Audio on the monitor are greyed out. Any Help much appreciated!