Duophonic

For the record company, see Duophonic Records. For the album by Charles and Eddie, see Duophonic (album). For duophonic synthesis, see Polyphony and monophony in instruments ยง Duophonic.
"Fake stereo" redirects here. For another artificial stereophonic process, see Perspecta.

Duophonic sound was a trade name for a type of audio signal processing used by Capitol Records on certain releases and re-releases of monaural recordings issued during the 1960s and 1970s.

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