stereophonic

From stereo- +‎ -phonic, by analogy with stereoscopic.

• Audio (Southern England):

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stereophonic (comparative more stereophonic, superlative most stereophonic)

1. Of or pertaining to sound reproduction using two channels to give a more natural two-dimensional sound distribution.

   Coordinate terms: monophonic, quadraphonic

   • 2000, Richard Osborne, Herbert Von Karajan: A Life in Music, page 349:

     […] this 1953 Hansel und Gretel is a classic example of how a well produced mono recording can seem more stereophonic than many of its later stereophonic rivals.

• binaural