In the past at Dream Theater concerts there has been an opening instrumental. That’s not on any album. It’s kind of a heavy orchestra opening before they start there first song.
SO as an example, you just walk into the venue and find your seat while just random music out of the overhead speakers play. Pandora or something.
But then, the lights go out and then there’s the Opening Instrumental you hear, before the first song from the set list.
Does anyone have any idea what I am talking about?