I don't watch this show but I thought this Wall Street Journal article
about the use of the player piano was interesting, particularly since
the soundtrack guy is creating new music files of current(?) music to
be played on the player.  And of course since he is having QRS cut the
music rolls.

http://blogs.wsj.com/speakeasy/2016/10/17/in-westworld-the-player-piano-is-a-main-attraction/ 

Paul Johnson

 [ The piano rolls were adapted by MMDer Stephen Kent Goodman, see
 [ http://shatontv.com/tag/robots/ 
 [ http://www.mi-pro.co.uk/index.php/news/read/the-man-behind-westworld-s-player-piano-scrolls/021550 
 [ https://www.thrillist.com/entertainment/nation/westworld-music-piano-radiohead-soundgarden-songs-interview 
 [ -- Robbie