No Desktop sound recorded

[Gomby]

Hi there, so I got a sound issue that drives me crazy : OBS never record the desktop sound, even if I see it modulating (cf photo 1). I checked the souce, wich is speakers (High definition audio device, cf photo 2) on both tracks, the same setting that for windows. I also checked the other possibilities (wave link thingies as my mic is an elgato, the screens, digital audio...), nothing worked. NO issues with the mic, neither wih the capture device (this one began to not work but after a few test it did). What can I do ?
PS : I use a hifi system as speakers

 

[Gomby]

 

[AaronD]

Output goes to the Track selection.
Monitor goes to the speakers.

You can mix any number of things into each track, but The Tracks don't mix with each other. They're designed for alternative audio that can be selected on playback, like different languages, descriptive audio, etc. Or you can use them to keep things separate for editing later.

Select the speakers here: