http://bugs.winehq.org/show_bug.cgi?id=24326
--- Comment #2 from Raymond superquad.vortex2@gmail.com 2010-09-28 21:42:56 CDT --- it is because winealsa.drv ignore the error returned by snd_pcm_sw_params_set_silence_threshold() since silence threshold must be less than the buffer size
the boundary is larger than the buffer size