Black Sabbath - NEVER SAY DIE DVD...

Why on Earth does it suck so bad? I mean Sabbath is hardly a low budget band or something . Yet the only live show of the classic line up looks like a poor transfer from an already bad VHS tape. The picture is at least watchable, but the sonics (both stereo and so called 5.1 mix) are worse then any worst nightmares that you ever head (Even worse then iron Maiden's Raising Hell). I think I have to switch the sound to my built-in TV speakers to be able to watch it at all. Now if someone says to me it was a poor recording from the start look at Deep Purple's Concerto for group and orchestra (1969). They turned a near bootleg sound into the pure DTS glory (you can hear every damn violin, the cymbals crash in the middle of your room and Ian Gillan sings right in front of you) and improved the extremely grainy picture quite a bit as well. What's wrong with Sabbath's management may I ask?