I remember listening to Watcher of the Skies, one my favorite Genesis songs, and it had this intro with a mellotron in it (imagine a keyboard which can play like an entire orchestra). I happened to find one of these old instruments, showed it to Octavia, and she liked it, except for the fact it took away any need to actually play the cello or any other stringed instrument.

Previous image: >>2499678:https://derpibooru.org/images/2499678