Hi, i play tb on steam with the new voicechat. And for some reason when i plug in my headphones to my laptop it still plays through the speakers, even though everything else (music on google chrome) plays through headphones.
right click the sound option on desk-top. (lower right side of the screen) select "playback devices" then select from the list your headset and set it as the default device.
then do the same for comunication devices.