I've always thought that either producers or a band member gets so eager to put out the best, most amazing album ever, that they make a recording beyond the limits of the band's live abilities. As far as the state of any vocalists' diminished abilities, I would prefer to hear a vocalist sing in...
Great posts! 2 of my go-to's are that haven't been listed yet...
Immolation
Laethora
Man at Elevator: "Must be some cockroach...???"
Peter Venkman: "Bite your head off, man."
Did you try bypassing the pedalboard? Just put a jumper from send to return.
My fx loop on my 6505+ was squirrely for a long time; random vol drops, scratchy, bassy, big click when switching. Eventually had a catastrophic cap fail (blue flash from amp).
Took it to a tech, been working great for...