No its purely that sky box does not send the 5.1 signal in HDMI they only send stereo so its not that HDMI does not do i know it does its just the cleaver people at sky dont use it for some reason..
I assume other people with vision 9 must have this issue, its fine with other things like my mac mini and DVB-t etc its just sky hd....
Its driving me mad and i have played with the delay setting on the sky box but i just cannot get it right.
Andy