My friends hear my sound while playing?

When I play Fortnite, my friends hear my sound! In other words, they receive the sound from the microphone AND from my game. I recently started using VoiceMeeter to use two audio outputs simultaneously (Bluetooth box and headset). The whole thing happens only if I run the sound through the software, otherwise everything works. I myself have no echo, no delay or any other problems with speakers, headphones or micro when I use VoiceMeeter to listen to music or play,

The microphone and the headphones are both connected via an adapter to a 4-pin 3.5 mm jack plug to my laptop (HP 350 G2, without sound card) and the box is connected via Bluetooth, but my friends quite certainly hear my sound, too. If the box is deactivated.

Would not it be necessary to fix something with SoundMeeter so that the soundtrack would not be transmitted by my system sound?

Yes, then you have to look at sound setting. Disable because "stereo mix" and choose only the microphone, and that should work.

Disable system sound.

I have; if you mean the normal option or do you mean anything in voicemeeter, thanks anyway

I have made

Yes, then maybe VoiceMaster is not good. Look in the VoiceMaster to see if you can adjust something.

Just ask your friends.

The normal.