Does anyone know of any PC sound cards that do high pass filtering on the outputs? I am currently using an Audigy ZS in our daily MCPC outputting to a custom discrete amplifier. This soundcard does some high pass filtering - but it is application dependant. For example, if streaming a video file with a premixed LFE channel off the NAS, it will play a high passed signal to the LCRS, and and LFE to the sub. If I am playing 2 channel audio from Itunes, it sends a full range signal to the L/R channels. I would prefer it if I could high pass the the LCRS and send all low frequencies to the sub.