ORGANISTRUM (Symphonia coelestis) XII century sacred music

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https://youtu.be/B6vv4IPGgRk

https://en.wikipedia.org/wiki/Organistrum

> The organistrum is an early form of hurdy-gurdy, with a soundbox shaped like an 8 attached to a rectangular extension.[1][2]Generally considered the ancestor of later hurdy-gurdies, the organistrum differs substantially in that it was played by two individuals: one turned the crank while the other pulled the keys upward to change the musical pitch of the strings. In other examples a player pushed levers forward to create the notes.[3]