With a Sky box you can change its volume in the System Settings configuration, so as to make it equal to the analogue volume. I would have thought that most addon Freeview boxes would have a similar feature, but with built-in Freeview you're stuck with how the manufacturer has set it up. As it happens, my cheapie Acoustic Solutions TV has the two volume levels set pretty well equal, so it can be done; shame on those manufacturers who don't do it right.