i had put the question to zZzZzZz.
the problem is when two players are opened at the same time there will be a noise from the speaker when i pause the foobar2000!!!!
the foobar2000's output format is higher than another player!
e.g. foobar is 24bit and winamp is 16bit!
zZzZzZz told me it the soundcard driver's problem.
but who can tell me which driver i should use?
my soundcard is integrated with motherbord and it is CT5880(creative)!!
help me!!!!