From MP3Car.com Wiki
[edit] What you need:
Foobar: http://www.foobar2000.org/
Kernel Streaming Plug-in (Optional): http://www.foobar2000.org/components/index.html
KX Project: http://www.driverheaven.net/kx-project-audio-driver-support-forum/
Master Volume Plug-in: http://www.driverheaven.net/effects-dsp/133301-new-master-volume-plugin.html
Console : http://www.console.jp
[edit] HOW TO
Foobar Output: Select KS 0/1 output for best result (because it bypass the windows Kmixer). DS 0/1 work too.
KS = Kernel Streaming DS = DirectSound
Foobar Resampling to 48khz: Whitout resampling playback fail. KX only work at 48khz in DSP mode.
KX Record in ASIO everything coming from the FXBus 0/1:
KX ASIO Configuration: Select 170ms latency as we don’t care about latency for playback and some VST plug-ins are more accurate whit larges chunks of data. 8+8 means 8 inputs channels and 8 outputs channels.
Console Audio I/O Configuration: Select only the I/O channels you need for better performance. Warning: Input or Output 1 and 2 in Console are 0/1 in KX.
Console Routing example:
KX Master Volume and gain: This is the last step, applying a Master Volume and gain to the outputs then connecting everything to the K2LT. The Master Volume part is very important because it is the only control we have over the volume (when using Kernel streaming). Implementing it at the last step prevent any delay. If it is implemented at the first step (before ASIO recording), there is a very annoying 170ms delay. Fixed negative gains prevent any clipping of the card preamp.
See also "How to use Console" by Durwood in ASIO VST Plug-in Audio Tuning Method
Wiki by BenOBS