Duophonic

Duophonic is a term used to refer to a sound process by which a monaural recording is reprocessed into a kind of "fake stereo" by splitting the signal into two channels, delaying the left and the right channels by means of delay lines and other circuits, desynchronizing the two channels by fractions of a second, and cutting the bass frequencies in one channel with a high-pass filter, then cutting the treble frequencies in the other channel with a low-pass filter. The result was an artificial stereo effect, without giving the listener the true directional sound characteristics of real stereo. In some cases, the effect was enhanced with reverberation and other technical tricks, sometimes adding stereo echo to mono tracks in an attempt to fool the listener.

"Duophonic" was used as a trade name for the process by Capitol Records for re-releases of mono recordings from June 1961 through the 1970s. Capitol employed this technique in order to increase their inventory of stereo LPs, to satisfy retailer demand for more stereo content (and help promote the sale of stereo receivers and turntables). For nearly ten years, Capitol used the banner "DUOPHONIC – For Stereo Phonographs Only" to differentiate their true stereo LPs from the Duophonic LPs.

Duophonic (album)

Duophonic is the debut album by American vocal duo Charles & Eddie, released in 1992. It includes the worldwide smash hit "Would I Lie to You?" along with two further singles; "N.Y.C." and "House Is Not a Home".

Track listing

Personnel