Another question: MSG 1973 July concerts: Excellent video and audio quality Knebworth 1979 concerts: Atrocious video and audio quality WHY??? Logically, the quality of the Knebworth shows must be higher (due to technological advancements).

Thanks, I think I got it. But anyway, what do you guys mean in "multitrack"? And could explain me what do soundboard and bootleg have in common? Sorry, I'm a newbie in bootlegs.

I still can't understand what is "generation" of a bootleg.

What do you mean in multi-track recordings? What is a "gen"?

Why didn't they release this concert seperately or on Led Zep DVD? And does anyone know why the video quality of the Knebworth shows is so low?

Can anyone list all Led Zeppelin concerts that were shot profesionally?