I know there was a thread about this, but I can't find it. In it, someone posted links to a METROPOLIS restoration website that had a 1927 recording of four examples from the score. It was a sample record of four pieces of the score, so theatre owners could decide whether they wanted to rent the orchestral score to play along with the film. I believe it was also mentioned that there was a second 78 RPM disc that had not turned up, with other selections from the score.
Perky Nom: Those weren't the links. Those are only short snippets of some of the selections. I guess it's a moot point now anyway, as all of the selections from both of the discs are included in that first YouTube link I posted above.