急問!!!!!Window Media Player!!!!!

Window Media Player 唔知比屋企禁左咩制..
依家個耳筒只係左邊先聽到音樂...
我本身就以為個耳筒另一邊壞左先聽唔到
不過我係網頁上聽歌,,兩邊都聽到喎!!!
只係用Window Media Player先聽到一邊有聲!!
我係音量個度已經調節好..都係咁樣!!
係咪Window Media Player入面有d選項要禁返咩制先正常返呢!!
唔該幫幫我!!!!!!

thxxxxxxxxxxxxxx!!!!