Thanks for the reply Claudio, I have continued this thread in the headset thread, because this thread is for Teamspeak.Peter, I do use a USB headset for ts while hearing the ingame sound on my pc speakers. It works like a charm, it just take longer to set correctly all sounds settings as to avoid echo.
I'm using a logitech headset I bought for a bit more than 20 euros. I can't remember which one exactly but i can find it if necessary. Anyway, the solution you are looking for works perfectly, at least for me
I don't know actually what I must choose now.
Some say it works, others say it does not work...