Hi There,
Have a read of
http://www.duffroomcorrection.com/wiki/Main_Page
Its to do with Digital Room Corection and i think it is posible to use convolver as a direct show plugin - Its a slightly different method of equalisation techniques though as IIRC you create impulse response and the computer works out the filters rather than a more manual measure and tweak.
Cya,
Lee