xbmc/xbmc — pull request #4313 by FernetMenta (2014-03-03 13:19:32+00:00)
Title: WASAPI: increase audio buffer for USB devices, fixes audible distortion

it turned out that 50ms buffer is too small for USB devices see ActiveAE testing thread:
http://forum.xbmc.org/showthread.php?tid=170338&pid=1639932#pid1639932