Analog Surround Sound Was Everywhere, But You Probably Didn’t Notice
Most media consumed today is digital, with movies and TV shows packaged in digital files containing millions of pixels and multiple audio channels.
In the past, media on film or tape was limited to analog stereo audio due to engineering limitations.
However, Dolby created a surround sound format that could operate within these limitations, converting two channels into four.
Dolby’s surround sound efforts were not initially aimed at the home, but at the cinema.
This format, which began as a cinematic format, brought surround sound to homes as early as 1982.
Author's summary: Analog surround sound was introduced by Dolby in 1982.
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