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Quadraphonic sound

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Quadraphonic Sound

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Quadraphonic Sound Demonstration! HEADPHONES ON!

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Quadraphonic Sound

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Quadraphonic sound test (DolbyProLogic Encoded)

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EV-4 Quadraphonic / QS Quadraphonic Test - Electronic Whirlpool (HQ Audio)

Quadraphonic sound – equivalent to what is now called 4.0 surround sound – uses four channels in which speakers are positioned at the four corners of the listening space, reproducing signals that are independent of one another. Quadraphonic audio was the earliest consumer product in surround sound and thousands of quadraphonic recordings were made during the 1970s.
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