High-Definition Multimedia Interface (HDMI) provides digital data with better quality audio/video output. If you have connected between HDTV and Windows 8 computer using an hdmi cord, it may only transfer video with no problem but doesn’t play sound through the TV. Here are the tips about how to change the audio output to hdmi in windows 8 Pro.
* To get started, open Control Panel, and go to Hardware and Sound > Manage Audio Devices.
* In the window labeled “Sound”, select “Playback” tab and you will see the sound devices available in a list.
* Choose “Digital Output Device (HDMI)” and click “Set Default” button. It will have a check mark over there and you are able to listen the music that is playing through your HDMI hookups with TV or stereo mixer.
However, I keep getting the lagged audio output issues and sometimes have a delay.