Hi - This is my first build and I too am struggling with getting audio output through HDMI. My monitor is a Sony TV, model KDL 32EX500 running at 1080p.
My setup is a CustoMac from the October buyer's guide running OSX 10.9 Mavericks (MultiBeast 6.0.1):
GA-Z87MX-D3H, BIOS F3
i7-4770
SanDisk...