I am not a english speaker so the article may be awkward.
The memory occupied by audiodg.exe will not be released. When a sound is played, the memory usage will increase. However, when there is no sound output, the occupied memory will not be released, but will be kept until the memory overflows (once go up to 6GB)
Until I restart the service manually, the memory usage go back to normal(about 14MB).
I consult the hotfix as below ,but the solution is invalid