Looking further into this myself, it appears that the hdmi port of the mother board or a plug-in video card ought to have audio on it. This does not seem to be the case. Plugging the hdmi line into a TV hdmi input does not seem to produce audio to the TV set. The mobo has separate audio ports for input and output. However, the spec on the MOBO (ASRock H310CM-HDV/M.2) under Audio reads: "7.1CH HD Audio (REaltek ALC887 Audio codec) To configure 7.1 CH HD Audio, it is required to use an HD front panel audio module and enable the multi-channel audio feature through the audio driver." The spec sheet has a bunch of such gobbledigook, some of which says to enable or disable things related to the audio. But not how to do so. At any rate, the HDMI port of the computer, on the MOBO, is very touchy. It would not tolerate an HDMI powered splitter box, that I put in to try and drive the TV set along with the local monitor. (Both on HDMI at the time.) (Everything interacts: I was driving the local monitor with the DVI connector, but it would not tolerate an HDMI cable at the same time.) As a result of the above, I installed an old GeForce GTX 550Ti and am now running the monitor and the remote TV thru the aforementioned powered HDMI splitter and that mostly works, except still no audio on the TV. It also takes a L O N G time for the monitor to come alive at boot, and once it did not--it came up in text screen. I would buy a modern video card, but I have no reason to believe it would work any better, if not at least faster. --doug