The Dark Side of the Moon was performed in quad.

Yes. Pink Floyd’s 1973 Dark Side of the Moon was mixed in quadraphonic for the album release, and they took that concept on the road. For the 1974 tour, they used a custom quadraphonic PA system — basically four sets of speakers pointed in different directions — to create the immersive sound they wanted for the live show.

It was a big technical flex at the time. They controlled the whole thing with a joystick, panning sounds around the room. The album itself is