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Groovy Grooves: 1970s Stereo Separates and Tape Formats
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What did the 'FM Muting' switch, found on almost all 1970s stereophonic receivers and tuners, do when activated by the user?
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A
It suppressed the loud static hiss heard when tuning between stations
B
It temporarily lowered the volume by 20 dB to answer a telephone
C
It forced a stereo FM broadcast into monaural playback
D
It filtered out high-frequency tape hiss from connected tape decks
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