Like many foobar users, I use my multi-channel soundcard as an active filter.
The dsp of François Bourdon is very good, and has many config options, but I have problems with it due to my config. AEDIO did this dsp, but it makes my foobar crash sometimes. This new one from AEDIO is only 2 ways, and is using FFT technology. I noticed a problem with ogg files (clipping+++), the solution is to activate the dsp equalizer (don't ask me why it works)

PS : You can also use Audiomulch as an active filter, I use the splitter in the MDA pack vst plugins http://mp3.deepsound.net/plugins_packs.php. BUT Audiomulch is limited to .wav and .mp3 files.
