It would depend on the movie and theatre. Surround sound started in a big way around the mid 70's with Star Wars using two optical tracks (Dolby Stereo system). Some films were done in stereo prior to that using magnetic tape but this made the films expensive to produce. The Dolby Stereo optical system was the big breakthrough (two optical tracks gave four channel sound) because it was cheap to distribute.
Movies in the 70's & 80's was it stereo or mono?
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Were movies shown at theaters in the 60's, 70's & 80's shown in mono or stereo.
When did multi-channel sound show up at the theaters? When did it show up at home?
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Were movies shown at theaters in the 60's, 70's & 80's shown in mono or stereo.
When did multi-channel sound show up at the theaters? When did it show up at home?
.