Bypass the Windows audio mixer with Winamp kernel streaming plugin
Winamp Kernel Streaming is a free plugin for Winamp that will let you bypass the Windows mixer and stream the output audio of Winamp directly to your sound-card or DAC.
The project began as an attempt of the author to improve the stability of the existing Kernel Streaming plugin developed by Chun Yu Shien. After several revisions of that code, many people were asking for the addition of various features, particularly buffering. For these features, the existing codebase was no longer considered suitable, so that he rewrote the plugin from scratch.
Note that the plugin won’t function if you enable 24 bit support in Winamp (you must leave it to 16 bit). Volume control through Winamp can be enabled or disabled without problems. Of course, you won’t have control of the volume through the Windows mixer. Check also this post if Winamp gives you the error CKsEnumFilters::EnumFilters failed.
For recent Winamp versions you may like also to use this WASAPI plugin (Not So Yasapi), simple and reliable.