In the November 2014 issue, Kal said his new Mac Mini (not the model introduced last week) would not output audio via HDMI without connecting a display to the HDMI port.
A possible solution is to connect the Gefen HDMI Detector between the Mini's HDMI output and the HDMI input of the audio receiver. The Gefen device emulates an HDCP-compliant monitor while passing through both the video and audio signals from its input to its output.
(I believe you need the gold colored model with the N suffix. The datasheet for the silver colored model does not mention audio pass-through.)
EXT-HDMI-EDIDPN:
http://www.gefen.com/kvm/ext-hd-edidpn.jsp?prod_id=14859
In the November 2014 issue, Kal said his new Mac Mini (not the model introduced last week) would not output audio via HDMI without connecting a display to the HDMI port.
A possible solution is to connect the Gefen HDMI Detector between the Mini's HDMI output and the HDMI input of the audio receiver. The Gefen device emulates an HDCP-compliant monitor while passing through both the video and audio signals from its input to its output.
(I believe you need the gold colored model with the N suffix. The datasheet for the silver colored model does not mention audio pass-through.)
EXT-HDMI-EDIDPN:
http://www.gefen.com/kvm/ext-hd-edidpn.jsp?prod_id=14859