Crossword Genius

"Fantasia" was the first commercial film shown in it

Ross

I believe the answer is:

stereo

(Other definitions for stereo that I've seen before include "One might play record" , "A 19 player" , "Means of amplification of sound through two or more channels" , "Music system with two speakers" , "Method of sound reproduction" .)

I've seen this clue in The New York Times.
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