Audio mixer?

[The1nonly1]

I have my steelseries arctis 5 headset plugged into my PC via USB A for sound. I also have a second display that I either use as a monitor or for watching streaming services from a firestick on. This second monitor has sound but also has a 3.5mm jack for headphones. How can I get sound from both PC and the second display through my steelseries arctis 5 headset at the same time so I can hear both? Is there hardware that will allow this? I know hardly anything about sound so help is appreciated. Thanks.

 

[The1nonly1]

To add onto this, is it possible via software if I use a 3.5mm cable from the display to my PC via the line in port? I think I have steel series software already that has a mixer.

 

[TrojanWhore]

To add onto this, is it possible via software if I use a 3.5mm cable from the display to my PC via the line in port? I think I have steel series software already that has a mixer.

If using USB for the audio out, then software is the way to go.
As you suggested, try 3.5 to 3.5mm cable in to you motherboard Line in first, if that doesn't work out you may benefit from a cheap USB mixer as an input to give you better/real time control of levels and act as a pre-amp (I use a behringer Xenyx 302USB, but mainly because I wanted an XLR input, you could get away with something cheaper).

As for software, I'm not sure about the Steelseries software, but you can just directly enable monitoring via device settings (go to the device properties for the input device then click additional device properties on the right, this will open the old style settings menu. Click on the listen tab and check the box for 'listen to this device')
Those instructions are for W10, I think it's roughly the same for 11. You might find that there is some latency using software monitoring, which if you can't tolerate then you may need to look at switching to an analog headset and using a hardware solution, but I think that should be ok.

 

[The1nonly1]

Thanks, I'll give the software route a go first. It's steelseries sonar which my headset and mic (not steelseries) go through an has the control for aux so sould work. I've ordered a 3.5mm cable top try first.

 

[DD_Crash]

Try Voicemeeter Banana plenty of videos on youtube