I have a Sound Blaster X-Fi Fata1ity for my Audio and this setting is already in the Control panel. I dont know if this is on lesser models but maybe worth checking out

Located under Speakers -> SVM on/off controls dynamic range volume.

Hi I am using the Logitech Z5500 connected to my PC via Optical Cable from the Decoder! SPDIF passthrough plays the DTS or Dolby Digital audio signals from supported MKV's and shows DTS/Dolby on the screen of the decoder where as with this option disabled it uses only standard audio! This is a great...