There are two EDID settings in the VM5808H - ATEN Default, and Port 1.
- If the VM5808H EDID mode is set to port 1,the VC880 must be connected to a HDMI monitor. If there is no monitor on port 1 there is no source for EDID information thus no audio
- If the VM5808H EDID mode is set to ATEN Default, the audio works properly because EDID information is supplied internally by the VM5808H |