Help WITH SOUND (EXPERTS ASKED)?

Ar
- in Nintendo
3

I have a problem. But I first sign the situation

1) The sound on my PC Does not work (the output plug rushing or not at all), for example, Line Out is not nich and front it just rushes

2) That's why my screen is running for DP (Display Port) and there I have headphones connected via which I hear the sound

3) I have a Nintendo Switch and I would like to use the PC SOund (eg people from Discord, hear the switch sound with a couple of headphones and that the microphone of mine works in the discord, quasi 2 sound outputs and 1 input

4) You know this headphone audio connection that you then put in the slot.

5) I have ordered a cable, which has 2 of these slots so 2 such "spikes" that you can put in So a sound hole for headphones.

6) If I connect to the Nintendo Switch and the PC at the LINE IN input, I would actually sound from the switch and PC Listen, right?
So if the headphones would go on the PC.

7) On the screen I have also connected the switch Therefore, the headphones must go to the PC

8) I almost want to be able to connect headphones to the computer and hear the sound of DISCORD and the SWITCH and still be able to talk to who with the microphone (is USB)

9) When I connect the switch to the line, he recognizes it as input and the PC also shows the volume bar as soon as the switch would almost play sound.

10) Now the PROBLEM: It does not work.

The headphones only work on the screen and at the bottom of the PC.
And I can't hear both sound issues somehow so PC and switch even if the headphones would go.

Does anyone know what I can do?
For comprehension questions or similar it writes as an answer I try to answer as soon as possible by comment!

Ro

Check your audio settings on the PC

Ar

This statement brings me absolutely nothing. What should I check exactly? ETC…
The answer is simply contextless

da

Man one, very hard everything formulated. And then this subdivision…

Which OS, which sound card, which motherboard, the problem was always, link to this Y plug system and maybe screens of the sound setting…