CPU Asrock X300 with Monitor - sound problem

[RZ2019]

Some time ago I have build my Asrock X300. I worked perfectly with a Samsung monitor connected via HDMI, and the sound worked perfectly with headset, sound via ears and sound out via microphone using the front panel connectors.
Recently bought AOC 24P2Q Monitor. This monitor is also connected via HDMI.
Now there is no sound via the front panel at all!
In the monitor there is Audio in and out - I can hear the sound via headset (not loud enough) and via an external loudspeaker. There is no way to talk via the microphone.
Is it a problem of the monitor?
Will I have the same problem using any other monitor that has audio plug in connectors?
Is the sound coming via the HDMI and cancels the front connectors of my X300?
If I will connect the AOC monitor via the D-sub port will I have the same problem?

​

 

[wertzius]

You can just choose your desired audio output and input device in the audio settings of Windows. You can connect as many soundcards and HDMI devices as you want but you have to choose which one is to be used.

 

[RZ2019]

You can just choose your desired audio output and input device in the audio settings of Windows. You can connect as many soundcards and HDMI devices as you want but you have to choose which one is to be used.

Many, many thanks! It seems as if problem solved!