Any update from Virgin on this?
If I take the sound from my TV to my Av kit it's fine but if I use the optical out the volume is really low and I'm told there's a humming by people with better hearing than me.
The exact same equipment worked fine on the old box.
Does HDMI improve the sound?
HDMI isn't relevant in this scenario, the equipment is all connected optically and always has been. The only change is to the latest Virgin box.