I've had a Logitech Revue for awhile. In the settings you can adjust the system sound volume, which controls the sound output for the optical sound. I have used the optical output to a Bose sound system that doesn't have IR control. As long has I didn't turn the sound to 100% I can control the sound through the harmony remote. I am trying to find out how to control the Sony NSZ-GS8 system sound volume from the remote it comes with. I don't use the sound from TV speakers. I am also wanting to find out how to control the sound from my ATT Uverse cable box with Sony NSZ-GS8 remote. If anyone can shed some light on this it would be great.