Windows 7: Getting sounds in both sound system and Headset

Hello everyone,

First of all, I want to apology for my english, I'm a french speaker

I'm using a standard sound system on my computer, connected with jack. However I often use a headset connected in USB will I'm playing. What I'm trying to do is to get system sounds in both standard sound device and headset at the same time, so I just have to turn off one of those devices to get the sound where I want when I want.



I've tried to check that in audio settings, but nothing seems to do that.

I know my system can display sounds in both devices at the same time, because in sounds settings, I can test devices, and I can get music in the headset while I have the sound test in the standard sound system.

Unfortunately I can't use a jack splitter, because the headset is USB-connected.

I've tried to install Realtek sounds manager, but this software doesn't detect the USB headset.

Thank you for your answer, and again, my apologies for my poor english