Is soundstage width a myth?

     Whenever imaging or soundstage are mentioned, I like to remind people about these resources: The following provide tests, with which one may determine whether their system actually images, or reproduces a soundstage, as recorded. 

      ie: On the Chesky sampler/test CD; David explains in detail, his position on the stage and distance from the mics, as he strikes a tambourine(Depth Test).

     LEDR test tells what to expect, if your system performs well, before each segment. 

    Chesky CD contains a number of tests, in addition to the LEDR.

 (https://www.audiocheck.net/audiotests_ledr.php) 

 and (https://www.amazon.com/Chesky-Records-Sampler-Audiophile-Compact/dp/B000003GF3)

     The shape of your ears’ pinnae is also a variable, regarding your ability to perceive images/locate sounds.

     A Stereophile article, that explains the LEDR test: http://www.stereophile.com/features/772/ 

@chocaholic -

       Lots of special effects, on that album, via a process called, "Q-sound" among various other recording tricks/gyrations.

       My favorite: the horse-drawn sleigh, that comes onstage from behind my left shoulder and proceeds diagonally, to behind the right speaker.

     (Caveat emptor) GREAT ALBUM, but: I've heard poor pressings/CDs that didn't retain the info/effects (same Columbia numbers, etc).

http://www.spacial-anomaly.com/amused-to-death-by-roger-waters-an-album-retrospective/

                       and: https://en.wikipedia.org/wiki/QSound