Voice chat while on desktop?

[Speedy26]

Is it possible to have voice chat on while being on desktop/browser or somewhere out of the game? I have my game in window mode and I micspam, but when I click outside TF2 It stops playing. Please help me ;) Note. I am an admin on the server, so comments like "micspamming is bad" are stupid. Thank you ! :)

[Atwooooood]

Not for sure, but I'm leaning more towards no they can't . Have you tried it and asked the people in your server if they can hear you?