WBFO, the National Public Radio (NPR) station in Buffalo, New York,
did a nice long article about QRS Music Rolls, featuring Bob Berkman.
Here's a link to the article:

https://news.wbfo.org/post/buffalo-love-story-bob-berkman-player-piano-and-qrs-music-rolls-video 

Paul Johnson

 [ That's a great article -- Bob Berkman is a fine story-teller,
 [ and he was there!  The NPR audio interview is available at
 [ https://cpa.ds.npr.org/wbfo/audio/2019/08/player_piano_rolls_feature_mixdown.mp3 
 [ -- Robbie