I have a computer that lets me hear while i speak or sing,we have a lot of fun with it.I have 4 computers and only this one does this.I got it used and it just does it. I have tried everthing to get my other computers to do it.It has nothing to do with the sound mixer controls on the bottom right corner of windows. The only thing I can think is it is hardware . I miss hearing while i sing. that computer is put away.