Audio input using "Audio In" connector for HDMI
I have an old Mac Mini that I'm trying to connect to my Benq W1070 projector.
The Mac doesn't have an HDMI out, only mini-DVI, so I'm using an HDMI converter dongle. Unfor the DVI output is video only, no audio, so to get sound, I need to run a second cable from the headphone jack on the Mac to the audio input jack on the projector.
This worked just fine on my old Panasonic TV. That had a menu option that allowed me to configure a particular HDMI input to use the audio from a separate, analog audio input.
But now that I've hooked up the Benq projector, I cannot find any way to tell it to use the audio in jack for HDMI1 or 2. I can't see why this shouldn't be possible, but haven't been able to find anything in the projector's nebulous menu system that allows me to configure this.
Has anyone tried to do anything similar? Any success?