Which groundbreaking product design innovation, first widely adopted in the 1970s, revolutionized sound distribution in theater performances and is now standard in most major venues?

The world of performing arts relies heavily on innovative product design to create immersive experiences. From revolutionary stage mechanisms to sustainable set materials, product design in theater has evolved dramatically over the centuries. This trivia question explores a significant innovation in theatrical product design that changed how performances are experienced by audiences worldwide. Test your knowledge of the technical side of performing arts!

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Surround sound systems with distributed speaker arrays
Hydraulic orchestra pit lifts
LED lighting rigs
Digital projection mapping systems