Editing DirectSound (section)

===Windows 2000/XP===
In Windows 2000, Microsoft also implemented the same WDM-based audio stack on [[Windows NT]] by introducing the WDM audio drivers and the kernel mixer component ([[KMixer]]).<ref name=CakeWalkKS>[http://www.cakewalk.com/DevXchange/article.aspx?aid=114 CakeWalk - Windows Pro Audio Roundtable]</ref> In Windows XP, Microsoft introduced another improved kernel streaming class driver, ''AVStream''. Beginning with Windows XP, hardware acceleration was also added for DirectSound capture effects processing<ref>[http://msdn.microsoft.com/en-us/library/ff536379(v=vs.85).aspx Exposing Hardware-Accelerated Capture Effects]</ref> such as [[Echo cancellation#Acoustic echo cancellation|Acoustic Echo Cancellation]] for USB microphones, noise suppression and array microphone support.