This Hooghuys organ is over 100 years old but that didn't stop self-proclaimed Hustler Alexey Rom from making it play pop music. To get this 1914 fairground organ to pump out ABBA's "Dancing Queen," Rom had to create a custom player scroll which is no easy feat!
The arrangement was made in Ableton Live using MIDI and was then punched into the cardboard book using an automated punch.
I can only assume the process to make the scroll was similar for this organ.
You may remember this is the same guy who played Boney M's disco hit "Rasputin" on a 1905 Marenghi organ.