This is "Cara Mia Addio", the turret opera from Portal 2, as played by 8 floppy drives.

The MIDI file is being played via 'Moppy', software which translates MIDI into floppy drive notes.

More information here: https://www.partsnotincluded.com/8-mu...

Download Links:
Moppy: https://github.com/SammyIAm/MoppyClassic
MIDI: https://github.com/SammyIAm/MoppyClas...