Final answer:
The first commercial movie with a complete surround soundtrack in 1940 was 'Fantasia' by Walt Disney.
Step-by-step explanation:
The first commercial movie with a complete surround soundtrack in 1940 was 'Fantasia' by Walt Disney.
Fantasia is a landmark film that combines classical music with stunning animation, featuring iconic segments such as 'The Sorcerer's Apprentice.' The film employed the use of 'Fantasound,' a groundbreaking stereophonic sound system that provided a surround sound experience for viewers.