[TazeTSchnitzel]

Interesting that they used computers to make them. It seems obvious in hindsight; player piano music is digital!

[userbinator]

Also interesting that we had digital data storage, in the form of punched cards and tape, decades before digital computers.

[vajrabum]

Longer than that. The Jaquard loom was invented in 1801 and the player piano was first demonstrated in 1876.