Hello friends, I recently got the new Sony VAIO notebook by replacing my old Laptop that is of the Toshiba. With my old Toshiba, I regularly visited music chatting room and sang songs with the help of the microphone. When I make use of the output mixer mode I can broadcast together my singing and music in the chatting room. But with the Sony, I cannot transmit music file in chatting room but I can sing and my singing can be transmitted in chatting room. I have no idea whether it is the problem with the Window 7 OS, or it is the trouble of Sony or can also be the problem of plug-in and play software give by the host of chatting room. Please help me out.