Can I Use DisplayPort for My Monitor and HDMI for My Soundbar with RTX 4070?

Have you tried adjusting the settings in Windows? Sometimes, you need to set the HDMI audio output as the default. Also, your soundbar might not be recognized because it needs to be on while connecting. Plus, if you're facing issues with Bluetooth, it could be due to the distance or interference. A direct HDMI connection would generally provide a better experience!

What soundbar are you using? Sometimes, HDMI audio needs a video signal to work. If it's not showing up, you could be missing that signal. You might need a monitor or TV that supports the feature to get HDMI audio working as intended.

It sounds like you're on the right track with your setup! Usually, your soundbar should show up as an audio output device if it's connected properly with HDMI. Have you checked if the soundbar is compatible with HDMI audio? Sometimes, manufacturers require specific settings or updates to function correctly. You might also want to look into using software like EarTrumpet to manage audio outputs better.