Audio output

I have Hass.io installed on a Pi 3. I have had Google Assistant running for some time, with the audio output on the Pi’s 3.5" audio jack. Now for some reason the audio will only come out on the HDMI. I have the same issue with the external add-on of mopidy it won’t load properly now.

Any one know how do define the audio output on Hass.io?

Thanks